neo-async - npm Package Compare versions

Comparing version 0.4.1 to 0.4.2

lib/async.min.js

@@ -1,42 +0,42 @@
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+return e};z.prototype.once=function a(c,e){var f=this;"object"==typeof c?v(c,function(c,e){a.call(f,e,c)}):(Array.isArray(e)?U(e,function(a){a._once=!0}):e._once=!0,f.on(c,e));return f};z.prototype.emit=function(a,c,e){function f(a,e){for(var f=g.length;--f;)g[f]._once&&g.splice(f,1);c(a,e)}c=c||function(){};var g=this._events[a]||[];if(!g.length)return c();a=this._emitter;a=e?a.bind(e):a;a===S?a(g,this._limit,f):a(g,f);return this}}).call(this);

package.json

 {
   "name": "neo-async",
-  "version": "0.4.1",
+  "version": "0.4.2",
   "description": "Neo-Async is compatible with Async.js, it is faster and has more feature.",
@@ -5,0 +5,0 @@ "main": "index.js",

README.md

@@ -9,5 +9,6 @@ # Neo-Async
 
-Neo-Async is compatible with Async.js, it is faster and has more feature.
-Async is a utilty module which provides staright-forward.
+Neo-Async is compatible with Async.js, it is [faster](#speed-comparison) and has more [feature](#feature).
 
+Async is a utility module which provides staright-forward.
+
 ---
@@ -131,3 +132,3 @@
 <a name='concat'/>
-### concat(collection, iterator, callback, thisArg)
+### concat(collection, iterator, [callback], [thisArg])
 
@@ -138,3 +139,3 @@ __Arguments__
 2. iterator(item, callback) (Function): The function called per iteration.
-3. callback(err, res) (Function): The function called at the end.
+3. callback(err, array) (Function): The function called at the end.
 4. thisArg (*): The this binding of iterator.
@@ -151,4 +152,4 @@
 };
-async.concat(collection, iterator, function(err, res) {
-  assert.deepEqual(res, [1, 2, 3]);
+async.concat(collection, iterator, function(err, array) {
+  assert.deepEqual(array, [1, 2, 3]);
   assert.deepEqual(order, [1, 2, 3]);
@@ -162,3 +163,3 @@ });
 <a name='concatSeries'/>
-### concatSeries(collection, iterator, callback, thisArg)
+### concatSeries(collection, iterator, [callback], [thisArg])
 
@@ -169,3 +170,3 @@ __Arguments__
 2. iterator(item, callback) (Function): The function called per iteration.
-3. callback(err, res) (Function): The function called at the end.
+3. callback(err, array) (Function): The function called at the end.
 4. thisArg (*): The this binding of iterator.
@@ -182,4 +183,4 @@
 };
-async.concatSeries(collection, iterator, function(err, res) {
-  assert.deepEqual(res, [1, 3, 2]);
+async.concatSeries(collection, iterator, function(err, array) {
+  assert.deepEqual(array, [1, 3, 2]);
   assert.deepEqual(order, [1, 3, 2]);
@@ -192,3 +193,3 @@ });
 <a name='concatLimit'/>
-### concatLimit(collection, limit, iterator, callback, thisArg)
+### concatLimit(collection, limit, iterator, [callback], [thisArg])
 
@@ -200,3 +201,3 @@ __Arguments__
 3. iterator(item, callback) (Function): The function called per iteration.
-4. callback(err, res) (Function): The function called at the end.
+4. callback(err, array) (Function): The function called at the end.
 5. thisArg (*): The this binding of iterator.
@@ -213,4 +214,4 @@
 };
-async.concatLimit(collection, 2, iterator, function(err, res) {
-  assert.deepEqual(res, [1, 3, 2]);
+async.concatLimit(collection, 2, iterator, function(err, array) {
+  assert.deepEqual(array, [1, 3, 2]);
   assert.deepEqual(order, [1, 3, 2]);
@@ -224,3 +225,3 @@ });
 <a name='detect'/>
-### detect(collection, iterator, callback, thisArg)
+### detect(collection, iterator, [callback], [thisArg])
 
@@ -231,3 +232,3 @@ __Arguments__
 2. iterator(item, callback) (Function): The function called per iteration.
-3. callback(res) (Function): The function called at the end.
+3. callback(item) (Function): The function called at the end.
 4. thisArg (*): The this binding of iterator.
@@ -244,4 +245,4 @@
 };
-async.detect(collection, iterator, function(res) {
-  assert.deepEqual(res, 3);
+async.detect(collection, iterator, function(item) {
+  assert.deepEqual(item, 3);
   assert.deepEqual(order, [1, 2, 3]);
@@ -255,3 +256,3 @@ });
 <a name='detectSeries'/>
-### detectSeries(collection, iterator, callback, thisArg)
+### detectSeries(collection, iterator, [callback], [thisArg])
 
@@ -262,3 +263,3 @@ __Arguments__
 2. iterator(item, callback) (Function): The function called per iteration.
-3. callback(res) (Function): The function called at the end.
+3. callback(item) (Function): The function called at the end.
 4. thisArg (*): The this binding of iterator.
@@ -275,4 +276,4 @@
 };
-async.detectSeries(collection, iterator, function(res) {
-  assert.deepEqual(res, 3);
+async.detectSeries(collection, iterator, function(item) {
+  assert.deepEqual(item, 3);
   assert.deepEqual(order, [1, 3]);
@@ -286,3 +287,3 @@ });
 <a name='detectLimit'/>
-### detectLimit(collection, limit, iterator, callback, thisArg)
+### detectLimit(collection, limit, iterator, [callback], [thisArg])
 
@@ -294,3 +295,3 @@ __Arguments__
 3. iterator(item, callback) (Function): The function called per iteration.
-4. callback(res) (Function): The function called at the end.
+4. callback(item) (Function): The function called at the end.
 5. thisArg (*): The this binding of iterator.
@@ -307,4 +308,4 @@
 };
-async.detectLimit(collection, 2, iterator, function(res) {
-  assert.deepEqual(res, 3);
+async.detectLimit(collection, 2, iterator, function(item) {
+  assert.deepEqual(item, 3);
   assert.deepEqual(order, [1, 3]);
@@ -314,6 +315,7 @@ });
 ```
+
 ---
 
 <a name='each'/>
-### each(collection, iterator, callback, thisArg)
+### each(collection, iterator, [callback], [thisArg])
 Applies the function iterator to each item in collection, in parallel.
@@ -349,3 +351,3 @@
 <a name='eachSeries'/>
-### eachSeries(collection, iterator, callback, thisArg)
+### eachSeries(collection, iterator, [callback], [thisArg])
 The same as each, in series.
@@ -381,3 +383,3 @@
 <a name='eachLimit'/>
-### eachLimit(collection, limit, iterator, callback, thisArg)
+### eachLimit(collection, limit, iterator, [callback], [thisArg])
 The same as each, in limited parallel.
@@ -413,4 +415,253 @@
 
+<a name='every'/>
+### every(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(bool) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(num, callback) {
+  setTimeout(function() {
+    order.push(num);
+    callback(num % 2);
+  }, num * 10);
+};
+async.every(collection, iterator, function(bool) {
+  assert.strictEqual(bool, false);
+  assert.deepEqual(order, [1, 2]);
+  done();
+});
+
+```
+
+---
+
+<a name='everySeries'/>
+### everySeries(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(bool) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(num, callback) {
+  setTimeout(function() {
+    order.push(num);
+    callback(num % 2);
+  }, num * 10);
+};
+async.everySeries(collection, iterator, function(bool) {
+  assert.strictEqual(bool, false);
+  assert.deepEqual(order, [1, 3, 2]);
+  done();
+});
+```
+
+---
+
+<a name='everyLimit'/>
+### everyLimit(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. limit (Number): The maximum number of iterators to run at any time.
+3. iterator(item, callback) (Function): The function called per iteration.
+4. callback(bool) (Function): The function called at the end.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var limit = 2;
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(num, callback) {
+  setTimeout(function() {
+    order.push(num);
+    callback(num % 2);
+  }, num * 10);
+};
+async.everyLimit(collection, limit, iterator, function(bool) {
+  assert.strictEqual(bool, false);
+  assert.deepEqual(order, [1, 3, 2]);
+  done();
+});
+```
+
+---
+
+<a name='filter'/>
+### filter(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(array) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [3, 1, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.filter(collection, iterator, function(array) {
+  assert.deepEqual(array, [3, 1]);
+  assert.deepEqual(order, [1, 2, 3, 4]);
+});
+```
+---
+
+<a name='filterSeries'/>
+### filterSeries(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(array) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [3, 1, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.filterSeries(collection, iterator, function(array) {
+  assert.deepEqual(array, [3, 1]);
+  assert.deepEqual(order, [3, 1, 2, 4]);
+});
+```
+----
+
+<a name='filterLimit'/>
+### filterLimit(collection, limit, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. limit (Number): The maximum number of iterators to run at any time.
+3. iterator(item, callback) (Function): The function called per iteration.
+4. callback(array) (Function): The function called at the end.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [3, 1, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.filterLimit(collection, 2, iterator, function(array) {
+  assert.deepEqual(array, [3, 1]);
+  assert.deepEqual(order, [1, 3, 2, 4]);
+});
+```
+
+---
+
+<a name='map'/>
+### map(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(err, array) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(null, num);
+  }, num * 10);
+};
+async.map(collection, iterator, function(err, array) {
+  assert.deepEqual(array, [1, 3, 2]);
+  assert.deepEqual(order, [1, 2, 3]);
+});
+```
+
+---
+
+<a name='mapSeries'/>
+### eachSeries(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(err, array) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(null, num);
+  }, num * 10);
+};
+async.mapSeries(collection, iterator, function(err, array) {
+  assert.deepEqual(array, [1, 3, 2]);
+  assert.deepEqual(order, [1, 3, 2]);
+});
+```
+
+---
+
+<a name='mapLimit'/>
+### mapLimit(collection, limit, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. limit (Number): The maximum number of iterators to run at any time.
+3. iterator(item, callback) (Function): The function called per iteration.
+4. callback(err, array) (Function): The function called at the end.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(null, num);
+  }, num * 10);
+};
+async.mapLimit(collection, 2, iterator, function(err, array) {
+  assert.deepEqual(array, [1, 3, 2]);
+  assert.deepEqual(order, [1, 3, 2]);
+});
+```
+
+---
+
 <a name='multiEach'/>
-### multiEach(collection, tasks, callback)
+### multiEach(collection, [tasks], [callback])
 This function provides asynchronous and straight-forward to deep nested each functions, in parallel.
@@ -510,4 +761,484 @@
 ```
+
 ---
 
+<a name='pick'/>
+### pick(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(collection) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.pick(collection, iterator, function(collection) {
+  assert.deepEqual(collection, [1, 3]);
+  assert.deepEqual(order, [1, 2, 3, 4]);
+});
+```
+
+---
+
+<a name='pickSeries'/>
+### pickSeries(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(collection) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.pickSeries(collection, iterator, function(collection) {
+  assert.deepEqual(collection, [1, 3]);
+  assert.deepEqual(order, [1, 3, 2, 4]);
+});
+```
+
+---
+
+<a name='pickLimit'/>
+### pickLimit(collection, limit, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. limit (Number): The maximum number of iterators to run at any time.
+3. iterator(item, callback) (Function): The function called per iteration.
+4. callback(collection) (Function): The function called at the end.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.pickLimit(collection, 2, iterator, function(collection) {
+  assert.deepEqual(collection, [1, 3]);
+  assert.deepEqual(order, [1, 3, 2, 4]);
+});
+```
+
+---
+
+<a name='reduce'/>
+### reduce(collection, accumulator, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. accumulator (*): Initial value of the accumulator.
+3. iterator(memo, item, callback) (Function): The function called per iteration.
+4. callback(err, result) (Function): The function called at the end.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(memo, num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(null, memo + num);
+  }, num * 10);
+};
+async.reduce(collection, 0, iterator, function(err, result) {
+  assert.strictEqual(result, 10);
+  assert.deepEqual(order, [1, 3, 2, 4]);
+});
+```
+
+---
+
+<a name='reduceRight'/>
+### reduceRight(collection, accumulator, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. accumulator (*): Initial value of the accumulator.
+3. iterator(memo, item, callback) (Function): The function called per iteration.
+4. callback(err, result) (Function): The function called at the end.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(memo, num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(null, memo + num);
+  }, num * 10);
+};
+async.reduceRight(collection, 0, iterator, function(err, result) {
+  assert.strictEqual(result, 10);
+  assert.deepEqual(order, [4, 2, 3, 1]);
+});
+```
+
+---
+
+<a name='reject'/>
+### reject(collection, iterator, [callback], [thisArg])
+
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(collection) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.reject(collection, iterator, function(collection) {
+  assert.deepEqual(collection, [2, 4]);
+  assert.deepEqual(order, [1, 2, 3, 4]);
+});
+```
+
+---
+
+<a name='rejectSeries'/>
+### rejectSeries(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(collection) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.rejectSeries(collection, iterator, function(collection) {
+  assert.deepEqual(collection, [2, 4]);
+  assert.deepEqual(order, [1, 3, 2, 4]);
+});
+```
+
+---
+
+<a name='rejectLimit'/>
+### rejectLimit(collection, limit, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. limit (Number): The maximum number of iterators to run at any time.
+3. iterator(item, callback) (Function): The function called per iteration.
+4. callback(collection) (Function): The function called at the end.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 3, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.rejectLimit(collection, 2, iterator, function(collection) {
+  assert.deepEqual(collection, [2, 4]);
+  assert.deepEqual(order, [1, 3, 2, 4]);
+});
+```
+
+---
+
+<a name='some'/>
+### some(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(bool) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [3, 1, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.some(collection, iterator, function(bool) {
+  assert.ok(bool);
+  assert.deepEqual(order, [1]);
+});
+```
+
+---
+
+<a name='someSeries'/>
+### someSeries(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(bool) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [3, 1, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.someSeries(collection, iterator, function(bool) {
+  assert.ok(bool);
+  assert.deepEqual(order, [3]);
+});
+```
+
+---
+
+<a name='someLimit'/>
+### someLimit(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. limit (Number): The maximum number of iterators to run at any time.
+3. iterator(item, callback) (Function): The function called per iteration.
+4. callback(bool) (Function): The function called at the end.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [3, 1, 2, 4];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(num % 2);
+  }, num * 10);
+};
+async.someLimit(collection, 2, iterator, function(bool) {
+  assert.ok(bool);
+  assert.deepEqual(order, [1]);
+});
+```
+
+---
+
+<a name='sortBy'/>
+### sortBy(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(err, array) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [3, 1, 4, 2];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(null, num % 2);
+  }, num * 10);
+};
+async.sortBy(collection, iterator, function(err, array) {
+  assert.deepEqual(array, [4, 2, 3, 1]);
+  assert.deepEqual(order, [1, 2, 3, 4]);
+});
+```
+
+---
+
+<a name='sortBySeries'/>
+### sortBySeries(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(item, callback) (Function): The function called per iteration.
+3. callback(err, array) (Function): The function called at the end.
+4. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [3, 1, 4, 2];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(null, num % 2);
+  }, num * 10);
+};
+async.sortBySeries(collection, iterator, function(err, array) {
+  assert.deepEqual(array, [4, 2, 3, 1]);
+  assert.deepEqual(order, [3, 1, 4, 2]);
+});
+```
+
+---
+
+<a name='sortByLimit'/>
+### sortByLimit(collection, iterator, [callback], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. limit (Number): The maximum number of iterators to run at any time.
+3. iterator(item, callback) (Function): The function called per iteration.
+4. callback(err, array) (Function): The function called at the end.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [3, 1, 4, 2];
+var iterator = function(num, done) {
+  setTimeout(function() {
+    order.push(num);
+    done(null, num % 2);
+  }, num * 10);
+};
+async.sortByLimit(collection, 2, iterator, function(err, array) {
+  assert.deepEqual(array, [4, 2, 3, 1]);
+  assert.deepEqual(order, [1, 3, 2, 4]);
+});
+```
+
+---
+<a name='transform'/>
+### transform(collection, iterator, [callback], [accumulator], [thisArg])
+This function is similar to lodash transform, in parallel.
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(memo, item, callback) (Function): The function called per iteration.
+3. callback(err, result) (Function): The function called at the end.
+4. accumulator (*): Initial value of the accumulator.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 5, 3, 2, 4];
+var iterator = function(memo, num, index, done) {
+  setTimeout(function() {
+    order.push(num);
+    if (num % 2) {
+      memo.push(num);
+    }
+    done();
+  }, num * 10);
+};
+async.transform(collection, iterator, function(err, result) {
+  assert.deepEqual(result, [1, 3, 5]);
+  assert.deepEqual(order, [1, 2, 3, 4, 5]);
+});
+```
+
+---
+
+<a name='transformSeries'/>
+### transformSeries(collection, iterator, [callback], [accumulator], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. iterator(memo, item, callback) (Function): The function called per iteration.
+3. callback(err, result) (Function): The function called at the end.
+4. accumulator (*): Initial value of the accumulator.
+5. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 5, 3, 2, 4];
+var iterator = function(memo, num, index, done) {
+  setTimeout(function() {
+    order.push(num);
+    if (num % 2) {
+      memo.push(num);
+    }
+    done();
+  }, num * 10);
+};
+async.transformSeries(collection, iterator, function(err, result) {
+  assert.deepEqual(result, [1, 5, 3]);
+  assert.deepEqual(order, [1, 5, 3, 2, 4]);
+});
+```
+
+---
+
+<a name='transformLimit'/>
+### transformLimit(collection, limit, iterator, [callback], [accumulator], [thisArg])
+
+__Arguments__
+
+1. collection (Array|Object): The collection to iterate over.
+2. limit (Number): The maximum number of iterators to run at any time.
+3. iterator(item, callback) (Function): The function called per iteration.
+4. callback(err, array) (Function): The function called at the end.
+5. accumulator (*): Initial value of the accumulator.
+6. thisArg (*): The this binding of iterator.
+
+```js
+var order = [];
+var collection = [1, 5, 3, 2, 4];
+var iterator = function(memo, num, index, done) {
+  setTimeout(function() {
+    order.push(num);
+    if (num % 2) {
+      memo.push(num);
+    }
+    done();
+  }, num * 10);
+};
+async.transformLimit(collection, 2, iterator, function(err, result) {
+  assert.deepEqual(result, [1, 5, 3]);
+  assert.deepEqual(order, [1, 5, 2, 3, 4]);
+});
+```
+
+---
+
 ## Speed Comparison
@@ -514,0 +1245,0 @@

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