vega-dataflow - npm Package Compare versions

Comparing version 2.0.0-beta.6 to 2.0.0-beta.7

build/vega-dataflow.min.js

@@ -1,2 +0,2 @@
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package.json

 {
   "name": "vega-dataflow",
-  "version": "2.0.0-beta.6",
+  "version": "2.0.0-beta.7",
   "description": "Reactive dataflow processing.",
@@ -5,0 +5,0 @@ "keywords": [

README.md

@@ -6,16 +6,16 @@ # vega-dataflow
 Defines a reactive dataflow graph that can process both scalar values and
-streaming relational data. A central `Dataflow` instance manages and schedules
-a collection of `Operator` instances, each of which is a node in a dataflow
-graph. Each operator maintains a local state *value*, and may only also
-process streaming data objects (or *tuples*) passing through. Operators may
-depend on a set of named `Parameters`, which can either be fixed values or
-live references to other operator values.
+streaming relational data. A central `Dataflow` instance manages and
+schedules a collection of `Operator` instances, each of which is a node in
+a dataflow graph. Each operator maintains a local state *value*, and may
+also process streaming data objects (or *tuples*) passing through. Operators
+may depend on a set of named `Parameters`, which can either be fixed values
+or live references to other operator values.
 
-Upon modifications to operator parameters or input data, changes are propagated
-through the graph in topological order. `Pulse` objects propagate from
-operators to their dependencies, and carry queues of added, removed and/or
-modified tuples.
+Upon modifications to operator parameters or input data, changes are
+propagated through the graph in topological order. `Pulse` objects propagate
+from operators to their dependencies, and carry queues of added, removed
+and/or modified tuples.
 
 This module contains a library of `Operator` types for data stream query
-processing, including data generation, sampling, filtering, binning, group-by
-aggregation, and cross-stream lookup operations.
+processing, including data generation, sampling, filtering, binning,
+group-by aggregation, and cross-stream lookup operations.

src/transforms/aggregate/Measures.js

@@ -21,9 +21,2 @@ import {extend, identity} from 'vega-util';
   }),
-  'distinct': measure({
-    name: 'distinct',
-    init: 'this.dmap = {}; this.distinct = 0;',
-    add:  'this.dmap[v] = 1 + (this.dmap[v] || (++this.distinct, 0));',
-    rem:  'if (!(--this.dmap[v])) --this.distinct;',
-    set:  'this.distinct'
-  }),
   'sum': measure({
@@ -76,2 +69,7 @@ name: 'sum',
   }),
+  'distinct': measure({
+    name: 'distinct',
+    set:  'cell.data.distinct(this.get)',
+    req:  ['values'], idx: 3
+  }),
   'ci0': measure({
@@ -170,4 +168,4 @@ name: 'ci0',
       ctr = 'this.cell = cell; this.tuple = t; this.valid = 0; this.missing = 0;',
-      add = 'if(v==null){this.missing++; return;} if(v!==v) return; ++this.valid;',
-      rem = 'if(v==null){this.missing--; return;} if(v!==v) return; --this.valid;',
+      add = 'if(v==null){++this.missing; return;} if(v!==v) return; ++this.valid;',
+      rem = 'if(v==null){--this.missing; return;} if(v!==v) return; --this.valid;',
       set = 'var t = this.tuple; var cell = this.cell;';
@@ -174,0 +172,0 @@

src/transforms/aggregate/TupleStore.js

@@ -51,4 +51,21 @@ import {extentIndex} from 'vega-util';
 
-// memoized statistics methods
+// memoizing statistics methods
 
+prototype.distinct = function(get) {
+  var v = this.values(),
+      n = v.length,
+      map = {},
+      count = 0, s;
+
+  while (--n >= 0) {
+    s = get(v[n]) + '';
+    if (!map.hasOwnProperty(s)) {
+      map[s] = 1;
+      ++count;
+    }
+  }
+
+  return count;
+};
+
 prototype.extent = function(get) {
@@ -55,0 +72,0 @@ if (this._get !== get || !this._ext) {

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