xstream - npm Package Compare versions

Comparing version 6.6.0 to 7.0.0

CHANGELOG.md

@@ -0,1 +1,25 @@
+<a name="7.0.0"></a>
+# [7.0.0](https://github.com/staltz/xstream/compare/v6.6.0...v7.0.0) (2016-10-24)
+
+
+### Bug Fixes
+
+* **map:** remove map+map fusion optimization ([1ca6a5c](https://github.com/staltz/xstream/commit/1ca6a5c)), closes [#98](https://github.com/staltz/xstream/issues/98) [#108](https://github.com/staltz/xstream/issues/108) [#93](https://github.com/staltz/xstream/issues/93)
+* **MemoryStream:** fix a leaking execution bug ([47e67ff](https://github.com/staltz/xstream/commit/47e67ff)), closes [#53](https://github.com/staltz/xstream/issues/53)
+
+
+### BREAKING CHANGES
+
+* map: This change will remove map+map fusions. Your application code may or
+may not rely on the bugs that map+map fusion caused, so we advise to
+update carefully, testing your application code as you go. Generally
+this is very straightforward and safe to update, as there are no visible
+API changes.
+* MemoryStream: This is generally safe to update, but note that the behavior around
+MemoryStream, startWith, take, imitate etc may have slightly changed, so
+it is recommended to run tests on your application and see if it is
+working, in case your application code was relying on buggy behavior.
+
+
+
 <a name="6.6.0"></a>
@@ -2,0 +26,0 @@ # [6.6.0](https://github.com/staltz/xstream/compare/v6.5.0...v6.6.0) (2016-10-19)

core.d.ts

@@ -265,3 +265,3 @@ export interface InternalListener<T> {
     constructor(passes: (t: T) => boolean, project: (t: T) => R, ins: Stream<T>);
-    _n(v: T): void;
+    _n(t: T): void;
 }
@@ -268,0 +268,0 @@ export declare class RememberOperator<T> implements InternalProducer<T> {

core.js

@@ -34,7 +34,2 @@ "use strict";
 }
-function compose2(f1, f2) {
-    return function composedFn(arg) {
-        return f1(f2(arg));
-    };
-}
 function and(f1, f2) {
@@ -758,7 +753,14 @@ return function andFn(t) {
     }
-    FilterMapOperator.prototype._n = function (v) {
-        if (this.passes(v)) {
-            _super.prototype._n.call(this, v);
+    FilterMapOperator.prototype._n = function (t) {
+        if (!this.passes(t))
+            return;
+        var u = this.out;
+        if (u === NO)
+            return;
+        try {
+            u._n(this.project(t));
         }
-        ;
+        catch (e) {
+            u._e(e);
+        }
     };
@@ -1281,8 +1283,2 @@ return FilterMapOperator;
         }
-        if (p instanceof FilterMapOperator) {
-            return new ctor(new FilterMapOperator(p.passes, compose2(project, p.project), p.ins));
-        }
-        if (p instanceof MapOperator) {
-            return new ctor(new MapOperator(compose2(project, p.project), p.ins));
-        }
         return new ctor(new MapOperator(project, this));
@@ -1819,6 +1815,25 @@ };
     MemoryStream.prototype._add = function (il) {
-        if (this._has) {
+        var ta = this._target;
+        if (ta !== NO)
+            return ta._add(il);
+        var a = this._ils;
+        a.push(il);
+        if (a.length > 1) {
+            if (this._has)
+                il._n(this._v);
+            return;
+        }
+        if (this._stopID !== NO) {
+            if (this._has)
+                il._n(this._v);
+            clearTimeout(this._stopID);
+            this._stopID = NO;
+        }
+        else if (this._has)
             il._n(this._v);
+        else {
+            var p = this._prod;
+            if (p !== NO)
+                p._start(this);
         }
-        _super.prototype._add.call(this, il);
     };
@@ -1825,0 +1840,0 @@ MemoryStream.prototype._stopNow = function () {

dist/xstream.js

@@ -35,7 +35,2 @@ (function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.xstream = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
 }
-function compose2(f1, f2) {
-    return function composedFn(arg) {
-        return f1(f2(arg));
-    };
-}
 function and(f1, f2) {
@@ -759,7 +754,14 @@ return function andFn(t) {
     }
-    FilterMapOperator.prototype._n = function (v) {
-        if (this.passes(v)) {
-            _super.prototype._n.call(this, v);
+    FilterMapOperator.prototype._n = function (t) {
+        if (!this.passes(t))
+            return;
+        var u = this.out;
+        if (u === NO)
+            return;
+        try {
+            u._n(this.project(t));
         }
-        ;
+        catch (e) {
+            u._e(e);
+        }
     };
@@ -1138,8 +1140,2 @@ return FilterMapOperator;
         }
-        if (p instanceof FilterMapOperator) {
-            return new ctor(new FilterMapOperator(p.passes, compose2(project, p.project), p.ins));
-        }
-        if (p instanceof MapOperator) {
-            return new ctor(new MapOperator(compose2(project, p.project), p.ins));
-        }
         return new ctor(new MapOperator(project, this));
@@ -1283,6 +1279,25 @@ };
     MemoryStream.prototype._add = function (il) {
-        if (this._has) {
+        var ta = this._target;
+        if (ta !== NO)
+            return ta._add(il);
+        var a = this._ils;
+        a.push(il);
+        if (a.length > 1) {
+            if (this._has)
+                il._n(this._v);
+            return;
+        }
+        if (this._stopID !== NO) {
+            if (this._has)
+                il._n(this._v);
+            clearTimeout(this._stopID);
+            this._stopID = NO;
+        }
+        else if (this._has)
             il._n(this._v);
+        else {
+            var p = this._prod;
+            if (p !== NO)
+                p._start(this);
         }
-        _super.prototype._add.call(this, il);
     };
@@ -1289,0 +1304,0 @@ MemoryStream.prototype._stopNow = function () {

dist/xstream.min.js

@@ -1,1 +0,1 @@
-(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.xstream=f()}})(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){"use strict";var __extends=this&&this.__extends||function(d,b){for(var p in b)if(b.hasOwnProperty(p))d[p]=b[p];function __(){this.constructor=d}d.prototype=b===null?Object.create(b):(__.prototype=b.prototype,new __)};var symbol_observable_1=require("symbol-observable");var NO={};function noop(){}function copy(a){var l=a.length;var b=Array(l);for(var i=0;i<l;++i){b[i]=a[i]}return b}exports.NO_IL={_n:noop,_e:noop,_c:noop};function internalizeProducer(producer){producer._start=function _start(il){il.next=il._n;il.error=il._e;il.complete=il._c;this.start(il)};producer._stop=producer.stop}function compose2(f1,f2){return function composedFn(arg){return f1(f2(arg))}}function and(f1,f2){return function andFn(t){return f1(t)&&f2(t)}}var Subscription=function(){function Subscription(_stream,_listener){this._stream=_stream;this._listener=_listener}Subscription.prototype.unsubscribe=function(){this._stream.removeListener(this._listener)};return Subscription}();exports.Subscription=Subscription;var ObservableProducer=function(){function ObservableProducer(observable){this.type="fromObservable";this.ins=observable}ObservableProducer.prototype._start=function(out){this.out=out;this._subscription=this.ins.subscribe(new ObservableListener(out))};ObservableProducer.prototype._stop=function(){this._subscription.unsubscribe()};return ObservableProducer}();var ObservableListener=function(){function ObservableListener(_listener){this._listener=_listener}ObservableListener.prototype.next=function(value){this._listener._n(value)};ObservableListener.prototype.error=function(err){this._listener._e(err)};ObservableListener.prototype.complete=function(){this._listener._c()};return ObservableListener}();var MergeProducer=function(){function MergeProducer(insArr){this.type="merge";this.insArr=insArr;this.out=NO;this.ac=0}MergeProducer.prototype._start=function(out){this.out=out;var s=this.insArr;var L=s.length;this.ac=L;for(var i=0;i<L;i++){s[i]._add(this)}};MergeProducer.prototype._stop=function(){var s=this.insArr;var L=s.length;for(var i=0;i<L;i++){s[i]._remove(this)}this.out=NO};MergeProducer.prototype._n=function(t){var u=this.out;if(u===NO)return;u._n(t)};MergeProducer.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};MergeProducer.prototype._c=function(){if(--this.ac<=0){var u=this.out;if(u===NO)return;u._c()}};return MergeProducer}();exports.MergeProducer=MergeProducer;var CombineListener=function(){function CombineListener(i,out,p){this.i=i;this.out=out;this.p=p;p.ils.push(this)}CombineListener.prototype._n=function(t){var p=this.p,out=this.out;if(out===NO)return;if(p.up(t,this.i)){out._n(p.vals)}};CombineListener.prototype._e=function(err){var out=this.out;if(out===NO)return;out._e(err)};CombineListener.prototype._c=function(){var p=this.p;if(p.out===NO)return;if(--p.Nc===0){p.out._c()}};return CombineListener}();exports.CombineListener=CombineListener;var CombineProducer=function(){function CombineProducer(insArr){this.type="combine";this.insArr=insArr;this.out=NO;this.ils=[];this.Nc=this.Nn=0;this.vals=[]}CombineProducer.prototype.up=function(t,i){var v=this.vals[i];var Nn=!this.Nn?0:v===NO?--this.Nn:this.Nn;this.vals[i]=t;return Nn===0};CombineProducer.prototype._start=function(out){this.out=out;var s=this.insArr;var n=this.Nc=this.Nn=s.length;var vals=this.vals=new Array(n);if(n===0){out._n([]);out._c()}else{for(var i=0;i<n;i++){vals[i]=NO;s[i]._add(new CombineListener(i,out,this))}}};CombineProducer.prototype._stop=function(){var s=this.insArr;var n=s.length;var ils=this.ils;for(var i=0;i<n;i++){s[i]._remove(ils[i])}this.out=NO;this.ils=[];this.vals=[]};return CombineProducer}();exports.CombineProducer=CombineProducer;var FromArrayProducer=function(){function FromArrayProducer(a){this.type="fromArray";this.a=a}FromArrayProducer.prototype._start=function(out){var a=this.a;for(var i=0,l=a.length;i<l;i++){out._n(a[i])}out._c()};FromArrayProducer.prototype._stop=function(){};return FromArrayProducer}();exports.FromArrayProducer=FromArrayProducer;var FromPromiseProducer=function(){function FromPromiseProducer(p){this.type="fromPromise";this.on=false;this.p=p}FromPromiseProducer.prototype._start=function(out){var prod=this;this.on=true;this.p.then(function(v){if(prod.on){out._n(v);out._c()}},function(e){out._e(e)}).then(noop,function(err){setTimeout(function(){throw err})})};FromPromiseProducer.prototype._stop=function(){this.on=false};return FromPromiseProducer}();exports.FromPromiseProducer=FromPromiseProducer;var PeriodicProducer=function(){function PeriodicProducer(period){this.type="periodic";this.period=period;this.intervalID=-1;this.i=0}PeriodicProducer.prototype._start=function(stream){var self=this;function intervalHandler(){stream._n(self.i++)}this.intervalID=setInterval(intervalHandler,this.period)};PeriodicProducer.prototype._stop=function(){if(this.intervalID!==-1)clearInterval(this.intervalID);this.intervalID=-1;this.i=0};return PeriodicProducer}();exports.PeriodicProducer=PeriodicProducer;var DebugOperator=function(){function DebugOperator(ins,arg){this.type="debug";this.ins=ins;this.out=NO;this.s=noop;this.l="";if(typeof arg==="string"){this.l=arg}else if(typeof arg==="function"){this.s=arg}}DebugOperator.prototype._start=function(out){this.out=out;this.ins._add(this)};DebugOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};DebugOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;var s=this.s,l=this.l;if(s!==noop){try{s(t)}catch(e){u._e(e)}}else if(l){console.log(l+":",t)}else{console.log(t)}u._n(t)};DebugOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};DebugOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return DebugOperator}();exports.DebugOperator=DebugOperator;var DropOperator=function(){function DropOperator(max,ins){this.type="drop";this.ins=ins;this.out=NO;this.max=max;this.dropped=0}DropOperator.prototype._start=function(out){this.out=out;this.dropped=0;this.ins._add(this)};DropOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};DropOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;if(this.dropped++>=this.max)u._n(t)};DropOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};DropOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return DropOperator}();exports.DropOperator=DropOperator;var OtherIL=function(){function OtherIL(out,op){this.out=out;this.op=op}OtherIL.prototype._n=function(t){this.op.end()};OtherIL.prototype._e=function(err){this.out._e(err)};OtherIL.prototype._c=function(){this.op.end()};return OtherIL}();var EndWhenOperator=function(){function EndWhenOperator(o,ins){this.type="endWhen";this.ins=ins;this.out=NO;this.o=o;this.oil=exports.NO_IL}EndWhenOperator.prototype._start=function(out){this.out=out;this.o._add(this.oil=new OtherIL(out,this));this.ins._add(this)};EndWhenOperator.prototype._stop=function(){this.ins._remove(this);this.o._remove(this.oil);this.out=NO;this.oil=exports.NO_IL};EndWhenOperator.prototype.end=function(){var u=this.out;if(u===NO)return;u._c()};EndWhenOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;u._n(t)};EndWhenOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};EndWhenOperator.prototype._c=function(){this.end()};return EndWhenOperator}();exports.EndWhenOperator=EndWhenOperator;var FilterOperator=function(){function FilterOperator(passes,ins){this.type="filter";this.ins=ins;this.out=NO;this.passes=passes}FilterOperator.prototype._start=function(out){this.out=out;this.ins._add(this)};FilterOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};FilterOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;try{if(this.passes(t))u._n(t)}catch(e){u._e(e)}};FilterOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};FilterOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return FilterOperator}();exports.FilterOperator=FilterOperator;var FlattenListener=function(){function FlattenListener(out,op){this.out=out;this.op=op}FlattenListener.prototype._n=function(t){this.out._n(t)};FlattenListener.prototype._e=function(err){this.out._e(err)};FlattenListener.prototype._c=function(){this.op.inner=NO;this.op.less()};return FlattenListener}();var FlattenOperator=function(){function FlattenOperator(ins){this.type="flatten";this.ins=ins;this.out=NO;this.open=true;this.inner=NO;this.il=exports.NO_IL}FlattenOperator.prototype._start=function(out){this.out=out;this.open=true;this.inner=NO;this.il=exports.NO_IL;this.ins._add(this)};FlattenOperator.prototype._stop=function(){this.ins._remove(this);if(this.inner!==NO)this.inner._remove(this.il);this.out=NO;this.open=true;this.inner=NO;this.il=exports.NO_IL};FlattenOperator.prototype.less=function(){var u=this.out;if(u===NO)return;if(!this.open&&this.inner===NO)u._c()};FlattenOperator.prototype._n=function(s){var u=this.out;if(u===NO)return;var _a=this,inner=_a.inner,il=_a.il;if(inner!==NO&&il!==exports.NO_IL)inner._remove(il);(this.inner=s)._add(this.il=new FlattenListener(u,this))};FlattenOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};FlattenOperator.prototype._c=function(){this.open=false;this.less()};return FlattenOperator}();exports.FlattenOperator=FlattenOperator;var FoldOperator=function(){function FoldOperator(f,seed,ins){this.type="fold";this.ins=ins;this.out=NO;this.f=f;this.acc=this.seed=seed}FoldOperator.prototype._start=function(out){this.out=out;this.acc=this.seed;out._n(this.acc);this.ins._add(this)};FoldOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO;this.acc=this.seed};FoldOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;try{u._n(this.acc=this.f(this.acc,t))}catch(e){u._e(e)}};FoldOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};FoldOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return FoldOperator}();exports.FoldOperator=FoldOperator;var LastOperator=function(){function LastOperator(ins){this.type="last";this.ins=ins;this.out=NO;this.has=false;this.val=NO}LastOperator.prototype._start=function(out){this.out=out;this.has=false;this.ins._add(this)};LastOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO;this.val=NO};LastOperator.prototype._n=function(t){this.has=true;this.val=t};LastOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};LastOperator.prototype._c=function(){var u=this.out;if(u===NO)return;if(this.has){u._n(this.val);u._c()}else{u._e("TODO show proper error")}};return LastOperator}();exports.LastOperator=LastOperator;var MapFlattenInner=function(){function MapFlattenInner(out,op){this.out=out;this.op=op}MapFlattenInner.prototype._n=function(r){this.out._n(r)};MapFlattenInner.prototype._e=function(err){this.out._e(err)};MapFlattenInner.prototype._c=function(){this.op.inner=NO;this.op.less()};return MapFlattenInner}();var MapFlattenOperator=function(){function MapFlattenOperator(mapOp){this.type=mapOp.type+"+flatten";this.ins=mapOp.ins;this.out=NO;this.mapOp=mapOp;this.inner=NO;this.il=exports.NO_IL;this.open=true}MapFlattenOperator.prototype._start=function(out){this.out=out;this.inner=NO;this.il=exports.NO_IL;this.open=true;this.mapOp.ins._add(this)};MapFlattenOperator.prototype._stop=function(){this.mapOp.ins._remove(this);if(this.inner!==NO)this.inner._remove(this.il);this.out=NO;this.inner=NO;this.il=exports.NO_IL};MapFlattenOperator.prototype.less=function(){if(!this.open&&this.inner===NO){var u=this.out;if(u===NO)return;u._c()}};MapFlattenOperator.prototype._n=function(v){var u=this.out;if(u===NO)return;var _a=this,inner=_a.inner,il=_a.il;var s;try{s=this.mapOp.project(v)}catch(e){u._e(e);return}if(inner!==NO&&il!==exports.NO_IL)inner._remove(il);(this.inner=s)._add(this.il=new MapFlattenInner(u,this))};MapFlattenOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};MapFlattenOperator.prototype._c=function(){this.open=false;this.less()};return MapFlattenOperator}();exports.MapFlattenOperator=MapFlattenOperator;var MapOperator=function(){function MapOperator(project,ins){this.type="map";this.ins=ins;this.out=NO;this.project=project}MapOperator.prototype._start=function(out){this.out=out;this.ins._add(this)};MapOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};MapOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;try{u._n(this.project(t))}catch(e){u._e(e)}};MapOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};MapOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return MapOperator}();exports.MapOperator=MapOperator;var FilterMapOperator=function(_super){__extends(FilterMapOperator,_super);function FilterMapOperator(passes,project,ins){_super.call(this,project,ins);this.type="filter+map";this.passes=passes}FilterMapOperator.prototype._n=function(v){if(this.passes(v)){_super.prototype._n.call(this,v)}};return FilterMapOperator}(MapOperator);exports.FilterMapOperator=FilterMapOperator;var RememberOperator=function(){function RememberOperator(ins){this.type="remember";this.ins=ins;this.out=NO}RememberOperator.prototype._start=function(out){this.out=out;this.ins._add(out)};RememberOperator.prototype._stop=function(){this.ins._remove(this.out);this.out=NO};return RememberOperator}();exports.RememberOperator=RememberOperator;var ReplaceErrorOperator=function(){function ReplaceErrorOperator(fn,ins){this.type="replaceError";this.ins=ins;this.out=NO;this.fn=fn}ReplaceErrorOperator.prototype._start=function(out){this.out=out;this.ins._add(this)};ReplaceErrorOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};ReplaceErrorOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;u._n(t)};ReplaceErrorOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;try{this.ins._remove(this);(this.ins=this.fn(err))._add(this)}catch(e){u._e(e)}};ReplaceErrorOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return ReplaceErrorOperator}();exports.ReplaceErrorOperator=ReplaceErrorOperator;var StartWithOperator=function(){function StartWithOperator(ins,val){this.type="startWith";this.ins=ins;this.out=NO;this.val=val}StartWithOperator.prototype._start=function(out){this.out=out;this.out._n(this.val);this.ins._add(out)};StartWithOperator.prototype._stop=function(){this.ins._remove(this.out);this.out=NO};return StartWithOperator}();exports.StartWithOperator=StartWithOperator;var TakeOperator=function(){function TakeOperator(max,ins){this.type="take";this.ins=ins;this.out=NO;this.max=max;this.taken=0}TakeOperator.prototype._start=function(out){this.out=out;this.taken=0;if(this.max<=0){out._c()}else{this.ins._add(this)}};TakeOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};TakeOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;if(this.taken++<this.max-1){u._n(t)}else{u._n(t);u._c()}};TakeOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};TakeOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return TakeOperator}();exports.TakeOperator=TakeOperator;var Stream=function(){function Stream(producer){this._prod=producer||NO;this._ils=[];this._stopID=NO;this._dl=NO;this._d=false;this._target=NO;this._err=NO}Stream.prototype._n=function(t){var a=this._ils;var L=a.length;if(this._d)this._dl._n(t);if(L==1)a[0]._n(t);else{var b=copy(a);for(var i=0;i<L;i++)b[i]._n(t)}};Stream.prototype._e=function(err){if(this._err!==NO)return;this._err=err;var a=this._ils;var L=a.length;this._x();if(this._d)this._dl._e(err);if(L==1)a[0]._e(err);else{var b=copy(a);for(var i=0;i<L;i++)b[i]._e(err)}};Stream.prototype._c=function(){var a=this._ils;var L=a.length;this._x();if(this._d)this._dl._c();if(L==1)a[0]._c();else{var b=copy(a);for(var i=0;i<L;i++)b[i]._c()}};Stream.prototype._x=function(){if(this._ils.length===0)return;if(this._prod!==NO)this._prod._stop();this._err=NO;this._ils=[]};Stream.prototype._stopNow=function(){this._prod._stop();this._err=NO;this._stopID=NO};Stream.prototype._add=function(il){var ta=this._target;if(ta!==NO)return ta._add(il);var a=this._ils;a.push(il);if(a.length>1)return;if(this._stopID!==NO){clearTimeout(this._stopID);this._stopID=NO}else{var p=this._prod;if(p!==NO)p._start(this)}};Stream.prototype._remove=function(il){var _this=this;var ta=this._target;if(ta!==NO)return ta._remove(il);var a=this._ils;var i=a.indexOf(il);if(i>-1){a.splice(i,1);if(this._prod!==NO&&a.length<=0){this._err=NO;this._stopID=setTimeout(function(){return _this._stopNow()})}else if(a.length===1){this._pruneCycles()}}};Stream.prototype._pruneCycles=function(){if(this._hasNoSinks(this,[])){this._remove(this._ils[0])}};Stream.prototype._hasNoSinks=function(x,trace){if(trace.indexOf(x)!==-1){return true}else if(x.out===this){return true}else if(x.out&&x.out!==NO){return this._hasNoSinks(x.out,trace.concat(x))}else if(x._ils){for(var i=0,N=x._ils.length;i<N;i++){if(!this._hasNoSinks(x._ils[i],trace.concat(x))){return false}}return true}else{return false}};Stream.prototype.ctor=function(){return this instanceof MemoryStream?MemoryStream:Stream};Stream.prototype.addListener=function(listener){listener._n=listener.next||noop;listener._e=listener.error||noop;listener._c=listener.complete||noop;this._add(listener)};Stream.prototype.removeListener=function(listener){this._remove(listener)};Stream.prototype.subscribe=function(listener){this.addListener(listener);return new Subscription(this,listener)};Stream.prototype[symbol_observable_1.default]=function(){return this};Stream.create=function(producer){if(producer){if(typeof producer.start!=="function"||typeof producer.stop!=="function"){throw new Error("producer requires both start and stop functions")}internalizeProducer(producer)}return new Stream(producer)};Stream.createWithMemory=function(producer){if(producer){internalizeProducer(producer)}return new MemoryStream(producer)};Stream.never=function(){return new Stream({_start:noop,_stop:noop})};Stream.empty=function(){return new Stream({_start:function(il){il._c()},_stop:noop})};Stream.throw=function(error){return new Stream({_start:function(il){il._e(error)},_stop:noop})};Stream.from=function(input){if(typeof input[symbol_observable_1.default]==="function"){return Stream.fromObservable(input)}else if(typeof input.then==="function"){return Stream.fromPromise(input)}else if(Array.isArray(input)){return Stream.fromArray(input)}throw new TypeError("Type of input to from() must be an Array, Promise, or Observable")};Stream.of=function(){var items=[];for(var _i=0;_i<arguments.length;_i++){items[_i-0]=arguments[_i]}return Stream.fromArray(items)};Stream.fromArray=function(array){return new Stream(new FromArrayProducer(array))};Stream.fromPromise=function(promise){return new Stream(new FromPromiseProducer(promise))};Stream.fromObservable=function(observable){return new Stream(new ObservableProducer(observable))};Stream.periodic=function(period){return new Stream(new PeriodicProducer(period))};Stream.prototype._map=function(project){var p=this._prod;var ctor=this.ctor();if(p instanceof FilterOperator){return new ctor(new FilterMapOperator(p.passes,project,p.ins))}if(p instanceof FilterMapOperator){return new ctor(new FilterMapOperator(p.passes,compose2(project,p.project),p.ins))}if(p instanceof MapOperator){return new ctor(new MapOperator(compose2(project,p.project),p.ins))}return new ctor(new MapOperator(project,this))};Stream.prototype.map=function(project){return this._map(project)};Stream.prototype.mapTo=function(projectedValue){var s=this.map(function(){return projectedValue});var op=s._prod;op.type=op.type.replace("map","mapTo");return s};Stream.prototype.filter=function(passes){var p=this._prod;if(p instanceof FilterOperator){return new Stream(new FilterOperator(and(p.passes,passes),p.ins))}return new Stream(new FilterOperator(passes,this))};Stream.prototype.take=function(amount){return new(this.ctor())(new TakeOperator(amount,this))};Stream.prototype.drop=function(amount){return new Stream(new DropOperator(amount,this))};Stream.prototype.last=function(){return new Stream(new LastOperator(this))};Stream.prototype.startWith=function(initial){return new MemoryStream(new StartWithOperator(this,initial))};Stream.prototype.endWhen=function(other){return new(this.ctor())(new EndWhenOperator(other,this))};Stream.prototype.fold=function(accumulate,seed){return new MemoryStream(new FoldOperator(accumulate,seed,this))};Stream.prototype.replaceError=function(replace){return new(this.ctor())(new ReplaceErrorOperator(replace,this))};Stream.prototype.flatten=function(){var p=this._prod;return new Stream(p instanceof MapOperator&&!(p instanceof FilterMapOperator)?new MapFlattenOperator(p):new FlattenOperator(this))};Stream.prototype.compose=function(operator){return operator(this)};Stream.prototype.remember=function(){return new MemoryStream(new RememberOperator(this))};Stream.prototype.debug=function(labelOrSpy){return new(this.ctor())(new DebugOperator(this,labelOrSpy))};Stream.prototype.imitate=function(target){if(target instanceof MemoryStream){throw new Error("A MemoryStream was given to imitate(), but it only "+"supports a Stream. Read more about this restriction here: "+"https://github.com/staltz/xstream#faq")}this._target=target;for(var ils=this._ils,N=ils.length,i=0;i<N;i++){target._add(ils[i])}this._ils=[]};Stream.prototype.shamefullySendNext=function(value){this._n(value)};Stream.prototype.shamefullySendError=function(error){this._e(error)};Stream.prototype.shamefullySendComplete=function(){this._c()};Stream.prototype.setDebugListener=function(listener){if(!listener){this._d=false;this._dl=NO}else{this._d=true;listener._n=listener.next;listener._e=listener.error;listener._c=listener.complete;this._dl=listener}};Stream.merge=function merge(){var streams=[];for(var _i=0;_i<arguments.length;_i++){streams[_i-0]=arguments[_i]}return new Stream(new MergeProducer(streams))};Stream.combine=function combine(){var streams=[];for(var _i=0;_i<arguments.length;_i++){streams[_i-0]=arguments[_i]}return new Stream(new CombineProducer(streams))};return Stream}();exports.Stream=Stream;var MemoryStream=function(_super){__extends(MemoryStream,_super);function MemoryStream(producer){_super.call(this,producer);this._has=false}MemoryStream.prototype._n=function(x){this._v=x;this._has=true;_super.prototype._n.call(this,x)};MemoryStream.prototype._add=function(il){if(this._has){il._n(this._v)}_super.prototype._add.call(this,il)};MemoryStream.prototype._stopNow=function(){this._has=false;_super.prototype._stopNow.call(this)};MemoryStream.prototype._x=function(){this._has=false;_super.prototype._x.call(this)};MemoryStream.prototype.map=function(project){return this._map(project)};MemoryStream.prototype.mapTo=function(projectedValue){return _super.prototype.mapTo.call(this,projectedValue)};MemoryStream.prototype.take=function(amount){return _super.prototype.take.call(this,amount)};MemoryStream.prototype.endWhen=function(other){return _super.prototype.endWhen.call(this,other)};MemoryStream.prototype.replaceError=function(replace){return _super.prototype.replaceError.call(this,replace)};MemoryStream.prototype.remember=function(){return this};MemoryStream.prototype.debug=function(labelOrSpy){return _super.prototype.debug.call(this,labelOrSpy)};return MemoryStream}(Stream);exports.MemoryStream=MemoryStream;Object.defineProperty(exports,"__esModule",{value:true});exports.default=Stream},{"symbol-observable":3}],2:[function(require,module,exports){"use strict";var core_1=require("./core");exports.Stream=core_1.Stream;exports.MemoryStream=core_1.MemoryStream;Object.defineProperty(exports,"__esModule",{value:true});exports.default=core_1.Stream},{"./core":1}],3:[function(require,module,exports){module.exports=require("./lib/index")},{"./lib/index":4}],4:[function(require,module,exports){(function(global){"use strict";Object.defineProperty(exports,"__esModule",{value:true});var _ponyfill=require("./ponyfill");var _ponyfill2=_interopRequireDefault(_ponyfill);function _interopRequireDefault(obj){return obj&&obj.__esModule?obj:{default:obj}}var root;if(typeof self!=="undefined"){root=self}else if(typeof window!=="undefined"){root=window}else if(typeof global!=="undefined"){root=global}else if(typeof module!=="undefined"){root=module}else{root=Function("return this")()}var result=(0,_ponyfill2["default"])(root);exports["default"]=result}).call(this,typeof global!=="undefined"?global:typeof self!=="undefined"?self:typeof window!=="undefined"?window:{})},{"./ponyfill":5}],5:[function(require,module,exports){"use strict";Object.defineProperty(exports,"__esModule",{value:true});exports["default"]=symbolObservablePonyfill;function symbolObservablePonyfill(root){var result;var _Symbol=root.Symbol;if(typeof _Symbol==="function"){if(_Symbol.observable){result=_Symbol.observable}else{result=_Symbol("observable");_Symbol.observable=result}}else{result="@@observable"}return result}},{}]},{},[2])(2)});
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.xstream=f()}})(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){"use strict";var __extends=this&&this.__extends||function(d,b){for(var p in b)if(b.hasOwnProperty(p))d[p]=b[p];function __(){this.constructor=d}d.prototype=b===null?Object.create(b):(__.prototype=b.prototype,new __)};var symbol_observable_1=require("symbol-observable");var NO={};function noop(){}function copy(a){var l=a.length;var b=Array(l);for(var i=0;i<l;++i){b[i]=a[i]}return b}exports.NO_IL={_n:noop,_e:noop,_c:noop};function internalizeProducer(producer){producer._start=function _start(il){il.next=il._n;il.error=il._e;il.complete=il._c;this.start(il)};producer._stop=producer.stop}function and(f1,f2){return function andFn(t){return f1(t)&&f2(t)}}var Subscription=function(){function Subscription(_stream,_listener){this._stream=_stream;this._listener=_listener}Subscription.prototype.unsubscribe=function(){this._stream.removeListener(this._listener)};return Subscription}();exports.Subscription=Subscription;var ObservableProducer=function(){function ObservableProducer(observable){this.type="fromObservable";this.ins=observable}ObservableProducer.prototype._start=function(out){this.out=out;this._subscription=this.ins.subscribe(new ObservableListener(out))};ObservableProducer.prototype._stop=function(){this._subscription.unsubscribe()};return ObservableProducer}();var ObservableListener=function(){function ObservableListener(_listener){this._listener=_listener}ObservableListener.prototype.next=function(value){this._listener._n(value)};ObservableListener.prototype.error=function(err){this._listener._e(err)};ObservableListener.prototype.complete=function(){this._listener._c()};return ObservableListener}();var MergeProducer=function(){function MergeProducer(insArr){this.type="merge";this.insArr=insArr;this.out=NO;this.ac=0}MergeProducer.prototype._start=function(out){this.out=out;var s=this.insArr;var L=s.length;this.ac=L;for(var i=0;i<L;i++){s[i]._add(this)}};MergeProducer.prototype._stop=function(){var s=this.insArr;var L=s.length;for(var i=0;i<L;i++){s[i]._remove(this)}this.out=NO};MergeProducer.prototype._n=function(t){var u=this.out;if(u===NO)return;u._n(t)};MergeProducer.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};MergeProducer.prototype._c=function(){if(--this.ac<=0){var u=this.out;if(u===NO)return;u._c()}};return MergeProducer}();exports.MergeProducer=MergeProducer;var CombineListener=function(){function CombineListener(i,out,p){this.i=i;this.out=out;this.p=p;p.ils.push(this)}CombineListener.prototype._n=function(t){var p=this.p,out=this.out;if(out===NO)return;if(p.up(t,this.i)){out._n(p.vals)}};CombineListener.prototype._e=function(err){var out=this.out;if(out===NO)return;out._e(err)};CombineListener.prototype._c=function(){var p=this.p;if(p.out===NO)return;if(--p.Nc===0){p.out._c()}};return CombineListener}();exports.CombineListener=CombineListener;var CombineProducer=function(){function CombineProducer(insArr){this.type="combine";this.insArr=insArr;this.out=NO;this.ils=[];this.Nc=this.Nn=0;this.vals=[]}CombineProducer.prototype.up=function(t,i){var v=this.vals[i];var Nn=!this.Nn?0:v===NO?--this.Nn:this.Nn;this.vals[i]=t;return Nn===0};CombineProducer.prototype._start=function(out){this.out=out;var s=this.insArr;var n=this.Nc=this.Nn=s.length;var vals=this.vals=new Array(n);if(n===0){out._n([]);out._c()}else{for(var i=0;i<n;i++){vals[i]=NO;s[i]._add(new CombineListener(i,out,this))}}};CombineProducer.prototype._stop=function(){var s=this.insArr;var n=s.length;var ils=this.ils;for(var i=0;i<n;i++){s[i]._remove(ils[i])}this.out=NO;this.ils=[];this.vals=[]};return CombineProducer}();exports.CombineProducer=CombineProducer;var FromArrayProducer=function(){function FromArrayProducer(a){this.type="fromArray";this.a=a}FromArrayProducer.prototype._start=function(out){var a=this.a;for(var i=0,l=a.length;i<l;i++){out._n(a[i])}out._c()};FromArrayProducer.prototype._stop=function(){};return FromArrayProducer}();exports.FromArrayProducer=FromArrayProducer;var FromPromiseProducer=function(){function FromPromiseProducer(p){this.type="fromPromise";this.on=false;this.p=p}FromPromiseProducer.prototype._start=function(out){var prod=this;this.on=true;this.p.then(function(v){if(prod.on){out._n(v);out._c()}},function(e){out._e(e)}).then(noop,function(err){setTimeout(function(){throw err})})};FromPromiseProducer.prototype._stop=function(){this.on=false};return FromPromiseProducer}();exports.FromPromiseProducer=FromPromiseProducer;var PeriodicProducer=function(){function PeriodicProducer(period){this.type="periodic";this.period=period;this.intervalID=-1;this.i=0}PeriodicProducer.prototype._start=function(stream){var self=this;function intervalHandler(){stream._n(self.i++)}this.intervalID=setInterval(intervalHandler,this.period)};PeriodicProducer.prototype._stop=function(){if(this.intervalID!==-1)clearInterval(this.intervalID);this.intervalID=-1;this.i=0};return PeriodicProducer}();exports.PeriodicProducer=PeriodicProducer;var DebugOperator=function(){function DebugOperator(ins,arg){this.type="debug";this.ins=ins;this.out=NO;this.s=noop;this.l="";if(typeof arg==="string"){this.l=arg}else if(typeof arg==="function"){this.s=arg}}DebugOperator.prototype._start=function(out){this.out=out;this.ins._add(this)};DebugOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};DebugOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;var s=this.s,l=this.l;if(s!==noop){try{s(t)}catch(e){u._e(e)}}else if(l){console.log(l+":",t)}else{console.log(t)}u._n(t)};DebugOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};DebugOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return DebugOperator}();exports.DebugOperator=DebugOperator;var DropOperator=function(){function DropOperator(max,ins){this.type="drop";this.ins=ins;this.out=NO;this.max=max;this.dropped=0}DropOperator.prototype._start=function(out){this.out=out;this.dropped=0;this.ins._add(this)};DropOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};DropOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;if(this.dropped++>=this.max)u._n(t)};DropOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};DropOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return DropOperator}();exports.DropOperator=DropOperator;var OtherIL=function(){function OtherIL(out,op){this.out=out;this.op=op}OtherIL.prototype._n=function(t){this.op.end()};OtherIL.prototype._e=function(err){this.out._e(err)};OtherIL.prototype._c=function(){this.op.end()};return OtherIL}();var EndWhenOperator=function(){function EndWhenOperator(o,ins){this.type="endWhen";this.ins=ins;this.out=NO;this.o=o;this.oil=exports.NO_IL}EndWhenOperator.prototype._start=function(out){this.out=out;this.o._add(this.oil=new OtherIL(out,this));this.ins._add(this)};EndWhenOperator.prototype._stop=function(){this.ins._remove(this);this.o._remove(this.oil);this.out=NO;this.oil=exports.NO_IL};EndWhenOperator.prototype.end=function(){var u=this.out;if(u===NO)return;u._c()};EndWhenOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;u._n(t)};EndWhenOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};EndWhenOperator.prototype._c=function(){this.end()};return EndWhenOperator}();exports.EndWhenOperator=EndWhenOperator;var FilterOperator=function(){function FilterOperator(passes,ins){this.type="filter";this.ins=ins;this.out=NO;this.passes=passes}FilterOperator.prototype._start=function(out){this.out=out;this.ins._add(this)};FilterOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};FilterOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;try{if(this.passes(t))u._n(t)}catch(e){u._e(e)}};FilterOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};FilterOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return FilterOperator}();exports.FilterOperator=FilterOperator;var FlattenListener=function(){function FlattenListener(out,op){this.out=out;this.op=op}FlattenListener.prototype._n=function(t){this.out._n(t)};FlattenListener.prototype._e=function(err){this.out._e(err)};FlattenListener.prototype._c=function(){this.op.inner=NO;this.op.less()};return FlattenListener}();var FlattenOperator=function(){function FlattenOperator(ins){this.type="flatten";this.ins=ins;this.out=NO;this.open=true;this.inner=NO;this.il=exports.NO_IL}FlattenOperator.prototype._start=function(out){this.out=out;this.open=true;this.inner=NO;this.il=exports.NO_IL;this.ins._add(this)};FlattenOperator.prototype._stop=function(){this.ins._remove(this);if(this.inner!==NO)this.inner._remove(this.il);this.out=NO;this.open=true;this.inner=NO;this.il=exports.NO_IL};FlattenOperator.prototype.less=function(){var u=this.out;if(u===NO)return;if(!this.open&&this.inner===NO)u._c()};FlattenOperator.prototype._n=function(s){var u=this.out;if(u===NO)return;var _a=this,inner=_a.inner,il=_a.il;if(inner!==NO&&il!==exports.NO_IL)inner._remove(il);(this.inner=s)._add(this.il=new FlattenListener(u,this))};FlattenOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};FlattenOperator.prototype._c=function(){this.open=false;this.less()};return FlattenOperator}();exports.FlattenOperator=FlattenOperator;var FoldOperator=function(){function FoldOperator(f,seed,ins){this.type="fold";this.ins=ins;this.out=NO;this.f=f;this.acc=this.seed=seed}FoldOperator.prototype._start=function(out){this.out=out;this.acc=this.seed;out._n(this.acc);this.ins._add(this)};FoldOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO;this.acc=this.seed};FoldOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;try{u._n(this.acc=this.f(this.acc,t))}catch(e){u._e(e)}};FoldOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};FoldOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return FoldOperator}();exports.FoldOperator=FoldOperator;var LastOperator=function(){function LastOperator(ins){this.type="last";this.ins=ins;this.out=NO;this.has=false;this.val=NO}LastOperator.prototype._start=function(out){this.out=out;this.has=false;this.ins._add(this)};LastOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO;this.val=NO};LastOperator.prototype._n=function(t){this.has=true;this.val=t};LastOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};LastOperator.prototype._c=function(){var u=this.out;if(u===NO)return;if(this.has){u._n(this.val);u._c()}else{u._e("TODO show proper error")}};return LastOperator}();exports.LastOperator=LastOperator;var MapFlattenInner=function(){function MapFlattenInner(out,op){this.out=out;this.op=op}MapFlattenInner.prototype._n=function(r){this.out._n(r)};MapFlattenInner.prototype._e=function(err){this.out._e(err)};MapFlattenInner.prototype._c=function(){this.op.inner=NO;this.op.less()};return MapFlattenInner}();var MapFlattenOperator=function(){function MapFlattenOperator(mapOp){this.type=mapOp.type+"+flatten";this.ins=mapOp.ins;this.out=NO;this.mapOp=mapOp;this.inner=NO;this.il=exports.NO_IL;this.open=true}MapFlattenOperator.prototype._start=function(out){this.out=out;this.inner=NO;this.il=exports.NO_IL;this.open=true;this.mapOp.ins._add(this)};MapFlattenOperator.prototype._stop=function(){this.mapOp.ins._remove(this);if(this.inner!==NO)this.inner._remove(this.il);this.out=NO;this.inner=NO;this.il=exports.NO_IL};MapFlattenOperator.prototype.less=function(){if(!this.open&&this.inner===NO){var u=this.out;if(u===NO)return;u._c()}};MapFlattenOperator.prototype._n=function(v){var u=this.out;if(u===NO)return;var _a=this,inner=_a.inner,il=_a.il;var s;try{s=this.mapOp.project(v)}catch(e){u._e(e);return}if(inner!==NO&&il!==exports.NO_IL)inner._remove(il);(this.inner=s)._add(this.il=new MapFlattenInner(u,this))};MapFlattenOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};MapFlattenOperator.prototype._c=function(){this.open=false;this.less()};return MapFlattenOperator}();exports.MapFlattenOperator=MapFlattenOperator;var MapOperator=function(){function MapOperator(project,ins){this.type="map";this.ins=ins;this.out=NO;this.project=project}MapOperator.prototype._start=function(out){this.out=out;this.ins._add(this)};MapOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};MapOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;try{u._n(this.project(t))}catch(e){u._e(e)}};MapOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};MapOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return MapOperator}();exports.MapOperator=MapOperator;var FilterMapOperator=function(_super){__extends(FilterMapOperator,_super);function FilterMapOperator(passes,project,ins){_super.call(this,project,ins);this.type="filter+map";this.passes=passes}FilterMapOperator.prototype._n=function(t){if(!this.passes(t))return;var u=this.out;if(u===NO)return;try{u._n(this.project(t))}catch(e){u._e(e)}};return FilterMapOperator}(MapOperator);exports.FilterMapOperator=FilterMapOperator;var RememberOperator=function(){function RememberOperator(ins){this.type="remember";this.ins=ins;this.out=NO}RememberOperator.prototype._start=function(out){this.out=out;this.ins._add(out)};RememberOperator.prototype._stop=function(){this.ins._remove(this.out);this.out=NO};return RememberOperator}();exports.RememberOperator=RememberOperator;var ReplaceErrorOperator=function(){function ReplaceErrorOperator(fn,ins){this.type="replaceError";this.ins=ins;this.out=NO;this.fn=fn}ReplaceErrorOperator.prototype._start=function(out){this.out=out;this.ins._add(this)};ReplaceErrorOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};ReplaceErrorOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;u._n(t)};ReplaceErrorOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;try{this.ins._remove(this);(this.ins=this.fn(err))._add(this)}catch(e){u._e(e)}};ReplaceErrorOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return ReplaceErrorOperator}();exports.ReplaceErrorOperator=ReplaceErrorOperator;var StartWithOperator=function(){function StartWithOperator(ins,val){this.type="startWith";this.ins=ins;this.out=NO;this.val=val}StartWithOperator.prototype._start=function(out){this.out=out;this.out._n(this.val);this.ins._add(out)};StartWithOperator.prototype._stop=function(){this.ins._remove(this.out);this.out=NO};return StartWithOperator}();exports.StartWithOperator=StartWithOperator;var TakeOperator=function(){function TakeOperator(max,ins){this.type="take";this.ins=ins;this.out=NO;this.max=max;this.taken=0}TakeOperator.prototype._start=function(out){this.out=out;this.taken=0;if(this.max<=0){out._c()}else{this.ins._add(this)}};TakeOperator.prototype._stop=function(){this.ins._remove(this);this.out=NO};TakeOperator.prototype._n=function(t){var u=this.out;if(u===NO)return;if(this.taken++<this.max-1){u._n(t)}else{u._n(t);u._c()}};TakeOperator.prototype._e=function(err){var u=this.out;if(u===NO)return;u._e(err)};TakeOperator.prototype._c=function(){var u=this.out;if(u===NO)return;u._c()};return TakeOperator}();exports.TakeOperator=TakeOperator;var Stream=function(){function Stream(producer){this._prod=producer||NO;this._ils=[];this._stopID=NO;this._dl=NO;this._d=false;this._target=NO;this._err=NO}Stream.prototype._n=function(t){var a=this._ils;var L=a.length;if(this._d)this._dl._n(t);if(L==1)a[0]._n(t);else{var b=copy(a);for(var i=0;i<L;i++)b[i]._n(t)}};Stream.prototype._e=function(err){if(this._err!==NO)return;this._err=err;var a=this._ils;var L=a.length;this._x();if(this._d)this._dl._e(err);if(L==1)a[0]._e(err);else{var b=copy(a);for(var i=0;i<L;i++)b[i]._e(err)}};Stream.prototype._c=function(){var a=this._ils;var L=a.length;this._x();if(this._d)this._dl._c();if(L==1)a[0]._c();else{var b=copy(a);for(var i=0;i<L;i++)b[i]._c()}};Stream.prototype._x=function(){if(this._ils.length===0)return;if(this._prod!==NO)this._prod._stop();this._err=NO;this._ils=[]};Stream.prototype._stopNow=function(){this._prod._stop();this._err=NO;this._stopID=NO};Stream.prototype._add=function(il){var ta=this._target;if(ta!==NO)return ta._add(il);var a=this._ils;a.push(il);if(a.length>1)return;if(this._stopID!==NO){clearTimeout(this._stopID);this._stopID=NO}else{var p=this._prod;if(p!==NO)p._start(this)}};Stream.prototype._remove=function(il){var _this=this;var ta=this._target;if(ta!==NO)return ta._remove(il);var a=this._ils;var i=a.indexOf(il);if(i>-1){a.splice(i,1);if(this._prod!==NO&&a.length<=0){this._err=NO;this._stopID=setTimeout(function(){return _this._stopNow()})}else if(a.length===1){this._pruneCycles()}}};Stream.prototype._pruneCycles=function(){if(this._hasNoSinks(this,[])){this._remove(this._ils[0])}};Stream.prototype._hasNoSinks=function(x,trace){if(trace.indexOf(x)!==-1){return true}else if(x.out===this){return true}else if(x.out&&x.out!==NO){return this._hasNoSinks(x.out,trace.concat(x))}else if(x._ils){for(var i=0,N=x._ils.length;i<N;i++){if(!this._hasNoSinks(x._ils[i],trace.concat(x))){return false}}return true}else{return false}};Stream.prototype.ctor=function(){return this instanceof MemoryStream?MemoryStream:Stream};Stream.prototype.addListener=function(listener){listener._n=listener.next||noop;listener._e=listener.error||noop;listener._c=listener.complete||noop;this._add(listener)};Stream.prototype.removeListener=function(listener){this._remove(listener)};Stream.prototype.subscribe=function(listener){this.addListener(listener);return new Subscription(this,listener)};Stream.prototype[symbol_observable_1.default]=function(){return this};Stream.create=function(producer){if(producer){if(typeof producer.start!=="function"||typeof producer.stop!=="function"){throw new Error("producer requires both start and stop functions")}internalizeProducer(producer)}return new Stream(producer)};Stream.createWithMemory=function(producer){if(producer){internalizeProducer(producer)}return new MemoryStream(producer)};Stream.never=function(){return new Stream({_start:noop,_stop:noop})};Stream.empty=function(){return new Stream({_start:function(il){il._c()},_stop:noop})};Stream.throw=function(error){return new Stream({_start:function(il){il._e(error)},_stop:noop})};Stream.from=function(input){if(typeof input[symbol_observable_1.default]==="function"){return Stream.fromObservable(input)}else if(typeof input.then==="function"){return Stream.fromPromise(input)}else if(Array.isArray(input)){return Stream.fromArray(input)}throw new TypeError("Type of input to from() must be an Array, Promise, or Observable")};Stream.of=function(){var items=[];for(var _i=0;_i<arguments.length;_i++){items[_i-0]=arguments[_i]}return Stream.fromArray(items)};Stream.fromArray=function(array){return new Stream(new FromArrayProducer(array))};Stream.fromPromise=function(promise){return new Stream(new FromPromiseProducer(promise))};Stream.fromObservable=function(observable){return new Stream(new ObservableProducer(observable))};Stream.periodic=function(period){return new Stream(new PeriodicProducer(period))};Stream.prototype._map=function(project){var p=this._prod;var ctor=this.ctor();if(p instanceof FilterOperator){return new ctor(new FilterMapOperator(p.passes,project,p.ins))}return new ctor(new MapOperator(project,this))};Stream.prototype.map=function(project){return this._map(project)};Stream.prototype.mapTo=function(projectedValue){var s=this.map(function(){return projectedValue});var op=s._prod;op.type=op.type.replace("map","mapTo");return s};Stream.prototype.filter=function(passes){var p=this._prod;if(p instanceof FilterOperator){return new Stream(new FilterOperator(and(p.passes,passes),p.ins))}return new Stream(new FilterOperator(passes,this))};Stream.prototype.take=function(amount){return new(this.ctor())(new TakeOperator(amount,this))};Stream.prototype.drop=function(amount){return new Stream(new DropOperator(amount,this))};Stream.prototype.last=function(){return new Stream(new LastOperator(this))};Stream.prototype.startWith=function(initial){return new MemoryStream(new StartWithOperator(this,initial))};Stream.prototype.endWhen=function(other){return new(this.ctor())(new EndWhenOperator(other,this))};Stream.prototype.fold=function(accumulate,seed){return new MemoryStream(new FoldOperator(accumulate,seed,this))};Stream.prototype.replaceError=function(replace){return new(this.ctor())(new ReplaceErrorOperator(replace,this))};Stream.prototype.flatten=function(){var p=this._prod;return new Stream(p instanceof MapOperator&&!(p instanceof FilterMapOperator)?new MapFlattenOperator(p):new FlattenOperator(this))};Stream.prototype.compose=function(operator){return operator(this)};Stream.prototype.remember=function(){return new MemoryStream(new RememberOperator(this))};Stream.prototype.debug=function(labelOrSpy){return new(this.ctor())(new DebugOperator(this,labelOrSpy))};Stream.prototype.imitate=function(target){if(target instanceof MemoryStream){throw new Error("A MemoryStream was given to imitate(), but it only "+"supports a Stream. Read more about this restriction here: "+"https://github.com/staltz/xstream#faq")}this._target=target;for(var ils=this._ils,N=ils.length,i=0;i<N;i++){target._add(ils[i])}this._ils=[]};Stream.prototype.shamefullySendNext=function(value){this._n(value)};Stream.prototype.shamefullySendError=function(error){this._e(error)};Stream.prototype.shamefullySendComplete=function(){this._c()};Stream.prototype.setDebugListener=function(listener){if(!listener){this._d=false;this._dl=NO}else{this._d=true;listener._n=listener.next;listener._e=listener.error;listener._c=listener.complete;this._dl=listener}};Stream.merge=function merge(){var streams=[];for(var _i=0;_i<arguments.length;_i++){streams[_i-0]=arguments[_i]}return new Stream(new MergeProducer(streams))};Stream.combine=function combine(){var streams=[];for(var _i=0;_i<arguments.length;_i++){streams[_i-0]=arguments[_i]}return new Stream(new CombineProducer(streams))};return Stream}();exports.Stream=Stream;var MemoryStream=function(_super){__extends(MemoryStream,_super);function MemoryStream(producer){_super.call(this,producer);this._has=false}MemoryStream.prototype._n=function(x){this._v=x;this._has=true;_super.prototype._n.call(this,x)};MemoryStream.prototype._add=function(il){var ta=this._target;if(ta!==NO)return ta._add(il);var a=this._ils;a.push(il);if(a.length>1){if(this._has)il._n(this._v);return}if(this._stopID!==NO){if(this._has)il._n(this._v);clearTimeout(this._stopID);this._stopID=NO}else if(this._has)il._n(this._v);else{var p=this._prod;if(p!==NO)p._start(this)}};MemoryStream.prototype._stopNow=function(){this._has=false;_super.prototype._stopNow.call(this)};MemoryStream.prototype._x=function(){this._has=false;_super.prototype._x.call(this)};MemoryStream.prototype.map=function(project){return this._map(project)};MemoryStream.prototype.mapTo=function(projectedValue){return _super.prototype.mapTo.call(this,projectedValue)};MemoryStream.prototype.take=function(amount){return _super.prototype.take.call(this,amount)};MemoryStream.prototype.endWhen=function(other){return _super.prototype.endWhen.call(this,other)};MemoryStream.prototype.replaceError=function(replace){return _super.prototype.replaceError.call(this,replace)};MemoryStream.prototype.remember=function(){return this};MemoryStream.prototype.debug=function(labelOrSpy){return _super.prototype.debug.call(this,labelOrSpy)};return MemoryStream}(Stream);exports.MemoryStream=MemoryStream;Object.defineProperty(exports,"__esModule",{value:true});exports.default=Stream},{"symbol-observable":3}],2:[function(require,module,exports){"use strict";var core_1=require("./core");exports.Stream=core_1.Stream;exports.MemoryStream=core_1.MemoryStream;Object.defineProperty(exports,"__esModule",{value:true});exports.default=core_1.Stream},{"./core":1}],3:[function(require,module,exports){module.exports=require("./lib/index")},{"./lib/index":4}],4:[function(require,module,exports){(function(global){"use strict";Object.defineProperty(exports,"__esModule",{value:true});var _ponyfill=require("./ponyfill");var _ponyfill2=_interopRequireDefault(_ponyfill);function _interopRequireDefault(obj){return obj&&obj.__esModule?obj:{default:obj}}var root;if(typeof self!=="undefined"){root=self}else if(typeof window!=="undefined"){root=window}else if(typeof global!=="undefined"){root=global}else if(typeof module!=="undefined"){root=module}else{root=Function("return this")()}var result=(0,_ponyfill2["default"])(root);exports["default"]=result}).call(this,typeof global!=="undefined"?global:typeof self!=="undefined"?self:typeof window!=="undefined"?window:{})},{"./ponyfill":5}],5:[function(require,module,exports){"use strict";Object.defineProperty(exports,"__esModule",{value:true});exports["default"]=symbolObservablePonyfill;function symbolObservablePonyfill(root){var result;var _Symbol=root.Symbol;if(typeof _Symbol==="function"){if(_Symbol.observable){result=_Symbol.observable}else{result=_Symbol("observable");_Symbol.observable=result}}else{result="@@observable"}return result}},{}]},{},[2])(2)});

package.json

 {
   "name": "xstream",
-  "version": "6.6.0",
+  "version": "7.0.0",
   "description": "An extremely intuitive, small, and fast functional reactive stream library for JavaScript",
@@ -5,0 +5,0 @@ "main": "index.js",

src/core.ts

@@ -84,8 +84,2 @@ import {Promise} from 'es6-promise';
 
-function compose2<T, U>(f1: (t: T) => any, f2: (t: T) => any): (t: T) => any {
-  return function composedFn(arg: T): any {
-    return f1(f2(arg));
-  };
-}
-
 function and<T>(f1: (t: T) => boolean, f2: (t: T) => boolean): (t: T) => boolean {
@@ -1051,6 +1045,11 @@ return function andFn(t: T): boolean {
 
-  _n(v: T) {
-    if (this.passes(v)) {
-      super._n(v);
-    };
+  _n(t: T) {
+    if (!this.passes(t)) return;
+    const u = this.out;
+    if (u === NO) return;
+    try {
+      u._n(this.project(t));
+    } catch (e) {
+      u._e(e);
+    }
   }
@@ -1646,21 +1645,4 @@ }
     if (p instanceof FilterOperator) {
-      return new ctor<U>(new FilterMapOperator<T, U>(
-        (p as FilterOperator<T>).passes,
-        project,
-        (p as FilterOperator<T>).ins
-      ));
+      return new ctor<U>(new FilterMapOperator<T, U>(p.passes, project, p.ins));
     }
-    if (p instanceof FilterMapOperator) {
-      return new ctor<U>(new FilterMapOperator<T, U>(
-        (p as FilterMapOperator<T, U>).passes,
-        compose2(project, (p as FilterMapOperator<T, U>).project),
-        (p as FilterMapOperator<T, U>).ins
-      ));
-    }
-    if (p instanceof MapOperator) {
-      return new ctor<U>(new MapOperator<T, U>(
-        compose2(project, (p as MapOperator<T, U>).project),
-        (p as MapOperator<T, U>).ins
-      ));
-    }
     return new ctor<U>(new MapOperator<T, U>(project, this));
@@ -2165,4 +2147,18 @@ }
   _add(il: InternalListener<T>): void {
-    if (this._has) { il._n(this._v); }
-    super._add(il);
+    const ta = this._target;
+    if (ta !== NO) return ta._add(il);
+    const a = this._ils;
+    a.push(il);
+    if (a.length > 1) {
+      if (this._has) il._n(this._v);
+      return;
+    }
+    if (this._stopID !== NO) {
+      if (this._has) il._n(this._v);
+      clearTimeout(this._stopID);
+      this._stopID = NO;
+    } else if (this._has) il._n(this._v); else {
+      const p = this._prod;
+      if (p !== NO) p._start(this);
+    }
   }
@@ -2169,0 +2165,0 @@

tests/memoryStream.ts

@@ -164,2 +164,106 @@ /// <reference path="../typings/globals/mocha/index.d.ts" />
   });
+
+  /**
+   * When an operator listener is about to be added to a memory stream, the
+   * operator will synchronously receive the remembered value, and may
+   * synchronously remove itself from the memory stream. This happens in the
+   * case of e.g. take(). In those cases, the operator should NOT be added AFTER
+   * it just "got the remembered value and removed itself", because that would
+   * create leaky executions of the stream. This was reported as bug #53 in
+   * GitHub.
+   */
+  it('should not allow an operator listener to be indefinitely attached', (done) => {
+    let debugCalled = 0;
+    const debugExpected = [42, 0];
+    const source$ = xs.periodic(100).startWith(42)
+      .debug(x => {
+        debugCalled += 1;
+        assert.strictEqual(debugExpected.length > 0, true);
+        assert.strictEqual(x, debugExpected.shift());
+      });
+
+    const expectedA = [42, 0];
+    const expectedB = [42];
+    let completeCalled = 0;
+
+    source$.take(2).addListener({
+      next: (x) => {
+        assert.strictEqual(x, expectedA.shift());
+      },
+      error: (err) => {},
+      complete: () => {
+        completeCalled += 1;
+      },
+    });
+
+    source$.take(1).addListener({
+      next: (x) => {
+        assert.strictEqual(x, expectedB.shift());
+      },
+      error: (err) => {},
+      complete: () => {
+        completeCalled += 1;
+      }
+    });
+
+    setTimeout(() => {
+      assert.strictEqual(debugExpected.length, 0);
+      assert.strictEqual(expectedA.length, 0);
+      assert.strictEqual(expectedB.length, 0);
+      assert.strictEqual(completeCalled, 2);
+      assert.strictEqual(debugCalled, 2);
+      done();
+    }, 500);
+  });
+
+  it('should emit remembered value also when cancelling a stop', (done) => {
+    const expectedA = [1];
+    const expectedB = [1, 2];
+    let completeCalled = 0;
+    let doneCalled = 0;
+
+    const source$ = xs.createWithMemory({
+      start(listener: Listener<number>) {
+        listener.next(1);
+        setTimeout(() => {
+          listener.next(2);
+          listener.complete();
+        }, 100);
+      },
+      stop() {
+        doneCalled += 1;
+      },
+    });
+
+    const listenerA = {
+      next: (x: number) => {
+        assert.strictEqual(x, expectedA.shift());
+        source$.removeListener(listenerA);
+      },
+      error: (err: any) => {},
+      complete: () => {
+        completeCalled += 1;
+      },
+    };
+
+    source$.addListener(listenerA);
+
+    source$.addListener({
+      next: (x) => {
+        assert.strictEqual(x, expectedB.shift());
+      },
+      error: (err) => {},
+      complete: () => {
+        completeCalled += 1;
+      }
+    });
+
+    setTimeout(() => {
+      assert.strictEqual(expectedA.length, 0);
+      assert.strictEqual(expectedB.length, 0);
+      assert.strictEqual(completeCalled, 1);
+      assert.strictEqual(doneCalled, 1);
+      done();
+    }, 300);
+  });
 });

tests/operator/map.ts

@@ -101,2 +101,66 @@ /// <reference path="../../typings/globals/mocha/index.d.ts" />
   });
+
+  it('should not repeat the map project function (e.g. no map+map fusion)', (done) => {
+    const stream = xs.create();
+    let firstMapCalled = 0;
+
+    const source$ = stream.map(x => {
+      firstMapCalled += 1;
+      return {a: 10, b: 20, c: 30};
+    });
+
+    const a$ = source$.map(x => x.a);
+    const b$ = source$.map(x => x.b);
+    const c$ = source$.map(x => x.c);
+
+    const expectedA = [10];
+    const expectedB = [20];
+    const expectedC = [30];
+
+    a$.addListener({next: a => assert.strictEqual(a, expectedA.shift())});
+    b$.addListener({next: b => assert.strictEqual(b, expectedB.shift())});
+    c$.addListener({next: c => assert.strictEqual(c, expectedC.shift())});
+
+    stream.shamefullySendNext(1);
+
+    setTimeout(() => {
+      assert.strictEqual(firstMapCalled, 1);
+      assert.strictEqual(expectedA.length, 0);
+      assert.strictEqual(expectedB.length, 0);
+      assert.strictEqual(expectedC.length, 0);
+      done();
+    });
+  });
+
+  it('should not repeat the map project function (e.g. no filter+map+map fusion)', (done) => {
+    const stream = xs.create();
+    let firstMapCalled = 0;
+
+    const source$ = stream.filter(x => x !== 42).map(x => {
+      firstMapCalled += 1;
+      return {a: 10, b: 20, c: 30};
+    });
+
+    const a$ = source$.map(x => x.a);
+    const b$ = source$.map(x => x.b);
+    const c$ = source$.map(x => x.c);
+
+    const expectedA = [10];
+    const expectedB = [20];
+    const expectedC = [30];
+
+    a$.addListener({next: a => assert.strictEqual(a, expectedA.shift())});
+    b$.addListener({next: b => assert.strictEqual(b, expectedB.shift())});
+    c$.addListener({next: c => assert.strictEqual(c, expectedC.shift())});
+
+    stream.shamefullySendNext(1);
+
+    setTimeout(() => {
+      assert.strictEqual(firstMapCalled, 1);
+      assert.strictEqual(expectedA.length, 0);
+      assert.strictEqual(expectedB.length, 0);
+      assert.strictEqual(expectedC.length, 0);
+      done();
+    });
+  });
 });

New alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Fixed alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

925132

increased by0.82%

Number of package files

161

increased by0.63%

Lines of code

18138

increased by1.15%

No dependency changes