rx-lite-extras - npm Package Compare versions

Comparing version 2.5.2 to 3.0.0

package.json

@@ -5,3 +5,3 @@ {
   "description": "Lightweight library extras for composing asynchronous and event-based operations in JavaScript",
-  "version": "2.5.2",
+  "version": "3.0.0",
   "homepage": "https://github.com/Reactive-Extensions/RxJS",
@@ -8,0 +8,0 @@ "author": {

rx.lite.extras.js

 // Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
 
 ;(function (factory) {
-    var objectTypes = {
-        'boolean': false,
-        'function': true,
-        'object': true,
-        'number': false,
-        'string': false,
-        'undefined': false
-    };
+  var objectTypes = {
+    'function': true,
+    'object': true
+  };
 
-    var root = (objectTypes[typeof window] && window) || this,
-        freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports,
-        freeModule = objectTypes[typeof module] && module && !module.nodeType && module,
-        moduleExports = freeModule && freeModule.exports === freeExports && freeExports,
-        freeGlobal = objectTypes[typeof global] && global;
+  var
+    freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports,
+    freeSelf = objectTypes[typeof self] && self.Object && self,
+    freeWindow = objectTypes[typeof window] && window && window.Object && window,
+    freeModule = objectTypes[typeof module] && module && !module.nodeType && module,
+    moduleExports = freeModule && freeModule.exports === freeExports && freeExports,
+    freeGlobal = freeExports && freeModule && typeof global == 'object' && global && global.Object && global;
 
-    if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {
-        root = freeGlobal;
-    }
+  var root = root = freeGlobal || ((freeWindow !== (this && this.window)) && freeWindow) || freeSelf || this;
 
-    // Because of build optimizers
-    if (typeof define === 'function' && define.amd) {
-        define(['rx-lite'], function (Rx, exports) {
-            return factory(root, exports, Rx);
-        });
-    } else if (typeof module === 'object' && module && module.exports === freeExports) {
-        module.exports = factory(root, module.exports, require('rx-lite'));
-    } else {
-        root.Rx = factory(root, {}, root.Rx);
-    }
+  // Because of build optimizers
+  if (typeof define === 'function' && define.amd) {
+    define(['rx-lite'], function (Rx, exports) {
+      return factory(root, exports, Rx);
+    });
+  } else if (typeof module === 'object' && module && module.exports === freeExports) {
+    module.exports = factory(root, module.exports, require('rx-lite'));
+  } else {
+    root.Rx = factory(root, {}, root.Rx);
+  }
 }.call(this, function (root, exp, Rx, undefined) {
@@ -39,3 +35,3 @@
     observableNever = Observable.never,
-    observableThrow = Observable.throwException,
+    observableThrow = Observable['throw'],
     AnonymousObservable = Rx.AnonymousObservable,
@@ -47,2 +43,3 @@ AnonymousObserver = Rx.AnonymousObserver,
     Observer = Rx.Observer,
+    observerCreate = Observer.create,
     Subject = Rx.Subject,
@@ -62,2 +59,3 @@ internals = Rx.internals,
     isPromise = helpers.isPromise,
+    isFunction = helpers.isFunction,
     inherits = internals.inherits,
@@ -70,2 +68,21 @@ bindCallback = internals.bindCallback,
 
+  var errorObj = {e: {}};
+  var tryCatchTarget;
+  function tryCatcher() {
+    try {
+      return tryCatchTarget.apply(this, arguments);
+    } catch (e) {
+      errorObj.e = e;
+      return errorObj;
+    }
+  }
+  function tryCatch(fn) {
+    if (!isFunction(fn)) { throw new TypeError('fn must be a function'); }
+    tryCatchTarget = fn;
+    return tryCatcher;
+  }
+  function thrower(e) {
+    throw e;
+  }
+
   function ScheduledDisposable(scheduler, disposable) {
@@ -301,12 +318,14 @@ this.scheduler = scheduler;
   Observable.using = function (resourceFactory, observableFactory) {
-    return new AnonymousObservable(function (observer) {
-      var disposable = disposableEmpty, resource, source;
-      try {
-        resource = resourceFactory();
-        resource && (disposable = resource);
-        source = observableFactory(resource);
-      } catch (exception) {
-        return new CompositeDisposable(observableThrow(exception).subscribe(observer), disposable);
+    return new AnonymousObservable(function (o) {
+      var disposable = disposableEmpty;
+      var resource = tryCatch(resourceFactory)();
+      if (resource === errorObj) {
+        return new CompositeDisposable(observableThrow(resource.e).subscribe(o), disposable);
       }
-      return new CompositeDisposable(source.subscribe(observer), disposable);
+      resource && (disposable = resource);
+      var source = tryCatch(observableFactory)(resource);
+      if (source === errorObj) {
+        return new CompositeDisposable(observableThrow(source.e).subscribe(o), disposable);
+      }
+      return new CompositeDisposable(source.subscribe(o), disposable);
     });
@@ -344,35 +363,33 @@ };
 
-      leftSubscription.setDisposable(leftSource.subscribe(function (left) {
-        choiceL();
-        if (choice === leftChoice) {
-          observer.onNext(left);
+      var leftSubscribe = observerCreate(
+        function (left) {
+          choiceL();
+          choice === leftChoice && observer.onNext(left);
+        },
+        function (e) {
+          choiceL();
+          choice === leftChoice && observer.onError(e);
+        },
+        function () {
+          choiceL();
+          choice === leftChoice && observer.onCompleted();
         }
-      }, function (err) {
-        choiceL();
-        if (choice === leftChoice) {
-          observer.onError(err);
+      );
+      var rightSubscribe = observerCreate(
+        function (right) {
+          choiceR();
+          choice === rightChoice && observer.onNext(right);
+        },
+        function (e) {
+          choiceR();
+          choice === rightChoice && observer.onError(e);
+        },
+        function () {
+          choiceR();
+          choice === rightChoice && observer.onCompleted();
         }
-      }, function () {
-        choiceL();
-        if (choice === leftChoice) {
-          observer.onCompleted();
-        }
-      }));
+      );
 
-      rightSubscription.setDisposable(rightSource.subscribe(function (right) {
-        choiceR();
-        if (choice === rightChoice) {
-          observer.onNext(right);
-        }
-      }, function (err) {
-        choiceR();
-        if (choice === rightChoice) {
-          observer.onError(err);
-        }
-      }, function () {
-        choiceR();
-        if (choice === rightChoice) {
-          observer.onCompleted();
-        }
-      }));
+      leftSubscription.setDisposable(leftSource.subscribe(leftSubscribe));
+      rightSubscription.setDisposable(rightSource.subscribe(rightSubscribe));
 
@@ -383,22 +400,19 @@ return new CompositeDisposable(leftSubscription, rightSubscription);
 
+  function amb(p, c) { return p.amb(c); }
+
   /**
    * Propagates the observable sequence or Promise that reacts first.
-   *
-   * @example
-   * var = Rx.Observable.amb(xs, ys, zs);
    * @returns {Observable} An observable sequence that surfaces any of the given sequences, whichever reacted first.
    */
   Observable.amb = function () {
-    var acc = observableNever(), items = [];
+    var acc = observableNever(), items;
     if (Array.isArray(arguments[0])) {
       items = arguments[0];
     } else {
-      for(var i = 0, len = arguments.length; i < len; i++) { items.push(arguments[i]); }
+      var len = arguments.length;
+      items = new Array(items);
+      for(var i = 0; i < len; i++) { items[i] = arguments[i]; }
     }
-
-    function func(previous, current) {
-      return previous.amb(current);
-    }
     for (var i = 0, len = items.length; i < len; i++) {
-      acc = func(acc, items[i]);
+      acc = amb(acc, items[i]);
     }
@@ -451,8 +465,7 @@ return acc;
 
+  function toArray(x) { return x.toArray(); }
+  function notEmpty(x) { return x.length > 0; }
+
   /**
    *  Projects each element of an observable sequence into zero or more buffers which are produced based on element count information.
-   *
-   * @example
-   *  var res = xs.bufferWithCount(10);
-   *  var res = xs.bufferWithCount(10, 1);
    * @param {Number} count Length of each buffer.
@@ -463,10 +476,6 @@ * @param {Number} [skip] Number of elements to skip between creation of consecutive buffers. If not provided, defaults to the count.
   observableProto.bufferWithCount = function (count, skip) {
-    if (typeof skip !== 'number') {
-      skip = count;
-    }
-    return this.windowWithCount(count, skip).selectMany(function (x) {
-      return x.toArray();
-    }).where(function (x) {
-      return x.length > 0;
-    });
+    typeof skip !== 'number' && (skip = count);
+    return this.windowWithCount(count, skip)
+      .flatMap(toArray)
+      .filter(notEmpty);
   };
@@ -629,3 +638,24 @@
 
+  /**
+   * Returns an observable sequence that shares a single subscription to the underlying sequence. This observable sequence
+   * can be resubscribed to, even if all prior subscriptions have ended. (unlike `.publish().refCount()`)
+   * @returns {Observable} An observable sequence that contains the elements of a sequence produced by multicasting the source.
+   */
+  observableProto.singleInstance = function() {
+    var source = this, hasObservable = false, observable;
+
+    function getObservable() {
+      if (!hasObservable) {
+        hasObservable = true;
+        observable = source.finally(function() { hasObservable = false; }).publish().refCount();
+      }
+      return observable;
+    };
+
+    return new AnonymousObservable(function(o) {
+      return getObservable().subscribe(o);
+    });
+  };
+
     return Rx;
 }));

rx.lite.extras.min.js

 /* Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.*/
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