core-js - npm Package Compare versions

Comparing version 0.2.5 to 0.3.0

bower.json

 {
   "name": "core.js",
   "main": "client/core.js",
-  "version": "0.2.5",
+  "version": "0.3.0",
   "description": "Standard Library",
@@ -6,0 +6,0 @@ "keywords": [

client/core.min.js

 /**
- * Core.js 0.2.5
+ * Core.js 0.3.0
  * https://github.com/zloirock/core-js
@@ -7,3 +7,3 @@ * License: http://rock.mit-license.org
  */
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 //# sourceMappingURL=library.min.map

client/shim.js

 /**
- * Core.js 0.2.5
+ * Core.js 0.3.0
  * https://github.com/zloirock/core-js
@@ -180,2 +180,5 @@ * License: http://rock.mit-license.org
   , ES5Object        = Object;
+function get(object, key){
+  if(has(object, key))return object[key];
+}
 // 19.1.2.1 Object.assign(target, source, ...)
@@ -196,15 +199,2 @@ var assign = Object.assign || function(target, source){
 }
-function createObjectToArray(isEntries){
-  return function(object){
-    var O      = ES5Object(object)
-      , keys   = getKeys(object)
-      , length = keys.length
-      , i      = 0
-      , result = Array(length)
-      , key;
-    if(isEntries)while(length > i)result[i] = [key = keys[i++], O[key]];
-    else while(length > i)result[i] = O[keys[i++]];
-    return result;
-  }
-}
 function keyOf(object, el){
@@ -412,3 +402,2 @@ var O      = ES5Object(object)
   , ITER  = safeSymbol('iter')
-  , SHIM  = safeSymbol('shim')
   , KEY   = 1
@@ -418,3 +407,5 @@ , VALUE = 2
   , IteratorPrototype = {}
-  , COLLECTION_KEYS;
+  , NATIVE_ITERATORS = SYMBOL_ITERATOR in ArrayProto
+    // Safari define byggy iterators w/o `next`
+  , BUGGY_ITERATORS = 'keys' in ArrayProto && !('next' in [].keys());
 // 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
@@ -431,10 +422,5 @@ setIterator(IteratorPrototype, returnThis);
 }
-function defineIterator(Constructor, NAME, value){
-  var proto       = Constructor[PROTOTYPE]
-    , HAS_FF_ITER = has(proto, FF_ITERATOR);
-  var iter = has(proto, SYMBOL_ITERATOR)
-    ? proto[SYMBOL_ITERATOR]
-    : HAS_FF_ITER
-      ? proto[FF_ITERATOR]
-      : value;
+function defineIterator(Constructor, NAME, value, DEFAULT){
+  var proto = Constructor[PROTOTYPE]
+    , iter  = get(proto, SYMBOL_ITERATOR) || get(proto, FF_ITERATOR) || (DEFAULT && get(proto, DEFAULT)) || value;
   if(framework){
@@ -448,3 +434,3 @@ // Define iterator
       // FF fix
-      HAS_FF_ITER && setIterator(iterProto, returnThis);
+      has(proto, FF_ITERATOR) && setIterator(iterProto, returnThis);
     }
@@ -457,2 +443,16 @@ }
 }
+function defineStdIterators(Base, NAME, Constructor, next, DEFAULT){
+  function createIter(kind){
+    return function(){
+      return new Constructor(this, kind);
+    }
+  }
+  createIterator(Constructor, NAME, next);
+  defineIterator(Base, NAME, createIter(DEFAULT), DEFAULT == VALUE ? 'values' : 'entries');
+  DEFAULT && $define(PROTO + FORCED * BUGGY_ITERATORS, NAME, {
+    entries: createIter(KEY+VALUE),
+    keys:    createIter(KEY),
+    values:  createIter(VALUE)
+  });
+}
 function iterResult(done, value){
@@ -858,3 +858,4 @@ return {value: value, done: !!done};
     , sqrt = Math.sqrt
-    , fcc  = String.fromCharCode;
+    , fcc  = String.fromCharCode
+    , at   = createPointAt(true);
   // 20.2.2.5 Math.asinh(x)
@@ -1034,2 +1035,17 @@ function asinh(x){
   });
+  // 21.1.3.27 String.prototype[@@iterator]()
+  // 21.1.5.1 CreateStringIterator Abstract Operation
+  defineStdIterators(String, STRING, function(iterated){
+    set(this, ITER, {o: String(iterated), i: 0});
+  // 21.1.5.2.1 %StringIteratorPrototype%.next()
+  }, function(){
+    var iter  = this[ITER]
+      , O     = iter.o
+      , index = iter.i
+      , point;
+    if(index >= O.length)return iterResult(1);
+    point = at.call(O, index);
+    iter.i += point.length;
+    return iterResult(0, point);
+  });
   
@@ -1099,3 +1115,24 @@ $define(STATIC, ARRAY, {
   });
+  // 22.1.3.4 Array.prototype.entries()
+  // 22.1.3.13 Array.prototype.keys()
+  // 22.1.3.29 Array.prototype.values()
+  // 22.1.3.30 Array.prototype[@@iterator]()
+  // 22.1.5.1 CreateArrayIterator Abstract Operation
+  defineStdIterators(Array, ARRAY, function(iterated, kind){
+    set(this, ITER, {o: ES5Object(iterated), i: 0, k: kind});
+  // 22.1.5.2.1 %ArrayIteratorPrototype%.next()
+  }, function(){
+    var iter  = this[ITER]
+      , O     = iter.o
+      , index = iter.i++;
+    if(!O || index >= O.length)return (iter.o = undefined), iterResult(1);
+    switch(iter.k){
+      case KEY:   return iterResult(0, index);
+      case VALUE: return iterResult(0, O[index]);
+    }             return iterResult(0, [index, O[index]]);
+  }, VALUE);
   
+  // argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7)
+  Iterators[ARGUMENTS] = Iterators[ARRAY];
+  
   // 24.3.3 JSON[@@toStringTag]
@@ -1343,5 +1380,6 @@ setToStringTag(global.JSON, 'JSON', true);
 !function(){
-  var KEYS     = COLLECTION_KEYS = safeSymbol('keys')
-    , VALUES   = safeSymbol('values')
-    , STOREID  = safeSymbol('storeId')
+  var DATA     = safeSymbol('data')
+    , UID      = safeSymbol('uid')
+    , LAST     = safeSymbol('last')
+    , FIRST    = safeSymbol('first')
     , WEAKDATA = safeSymbol('weakData')
@@ -1353,24 +1391,33 @@ , WEAKID   = safeSymbol('weakId')
   
-  function wrapSVZ(method, chain){
-    return function(a, b){
+  function fixSVZ(proto, key, method, chain){
+    framework && hidden(proto, key, function(a, b){
       var result = method.call(this, same(a, -0) ? 0 : a, b);
       return chain ? this : result;
-    }
+    });
   }
   function getCollection(C, NAME, methods, commonMethods, isMap, isWeak){
-    var ADDER_KEY = isMap ? 'set' : 'add'
-      , init      = commonMethods.clear
-      , O         = {};
+    var ADDER = isMap ? 'set' : 'add'
+      , proto = C && C[PROTOTYPE]
+      , O     = {};
     function initFromIterable(that, iterable){
-      if(iterable != undefined)forOf(iterable, isMap, that[ADDER_KEY], that);
+      if(iterable != undefined)forOf(iterable, isMap, that[ADDER], that);
       return that;
     }
-    if(!(isNative(C) && (isWeak || has(C[PROTOTYPE], FOR_EACH)))){
+    if(BUGGY_ITERATORS || !(isNative(C) && (isWeak || (has(proto, FOR_EACH) && has(proto, 'entries'))))){
       // create collection constructor
-      C = function(iterable){
-        assertInstance(this, C, NAME);
-        isWeak ? hidden(this, WEAKID, wid++) : init.call(this);
-        initFromIterable(this, iterable);
-      }
-      set(C, SHIM, true);
+      C = isWeak
+        ? function(iterable){
+            assertInstance(this, C, NAME);
+            set(this, WEAKID, wid++);
+            initFromIterable(this, iterable);
+          }
+        : function(iterable){
+            var that = this;
+            assertInstance(that, C, NAME);
+            set(that, DATA, create(null));
+            set(that, SIZE, 0);
+            set(that, LAST, undefined);
+            set(that, FIRST, undefined);
+            initFromIterable(that, iterable);
+          };
       assignHidden(assignHidden(C[PROTOTYPE], methods), commonMethods);
@@ -1382,8 +1429,7 @@ isWeak || defineProperty(C[PROTOTYPE], 'size', {get: function(){
       var Native = C
-        , proto  = C[PROTOTYPE]
         , inst   = new C
-        , chain  = inst[ADDER_KEY](isWeak ? {} : -0, 1)
+        , chain  = inst[ADDER](isWeak ? {} : -0, 1)
         , buggyZero;
       // wrap to init collections from iterable
-      if(!(SYMBOL_ITERATOR in ArrayProto && C.length)){
+      if(!NATIVE_ITERATORS || !C.length){
         C = function(iterable){
@@ -1398,12 +1444,10 @@ assertInstance(this, C, NAME);
       });
-      if(framework){
-        // fix converting -0 key to +0
-        if(buggyZero){
-          hidden(proto, 'delete', wrapSVZ(proto['delete']));
-          hidden(proto, 'has', wrapSVZ(proto.has));
-          isMap && hidden(proto, 'get', wrapSVZ(proto.get));
-        }
-        // fix .add & .set for chaining
-        if(buggyZero || chain !== inst)hidden(proto, ADDER_KEY, wrapSVZ(proto[ADDER_KEY], true));
+      // fix converting -0 key to +0
+      if(buggyZero){
+        fixSVZ(proto, 'delete', proto['delete']);
+        fixSVZ(proto, 'has', proto.has);
+        isMap && fixSVZ(proto, 'get', proto.get);
       }
+      // fix .add & .set for chaining
+      if(buggyZero || chain !== inst)fixSVZ(proto, ADDER, proto[ADDER], true);
     }
@@ -1420,53 +1464,68 @@ setToStringTag(C, NAME);
     // if it hasn't object id - add next
-    if(!has(it, STOREID)){
-      if(create)hidden(it, STOREID, ++uid);
+    if(!has(it, UID)){
+      if(create)hidden(it, UID, ++uid);
       else return '';
     }
     // return object id with 'O' prefix
-    return 'O' + it[STOREID];
+    return 'O' + it[UID];
   }
+  
+  function def(that, key, value){
+    var index  = fastKey(key, true)
+      , values = that[DATA]
+      , last   = that[LAST]
+      , entry;
+    if(index in values)values[index].v = value;
+    else {
+      entry = values[index] = {k: key, v: value, p: last};
+      if(!that[FIRST])that[FIRST] = entry;
+      if(last)last.n = entry;
+      that[LAST] = entry;
+      that[SIZE]++;
+    } return that;
+  }
+  function del(that, keys, index){
+    var entry = keys[index]
+      , next  = entry.n
+      , prev  = entry.p;
+    delete keys[index];
+    entry.r = true;
+    if(prev)prev.n = next;
+    if(next)next.p = prev;
+    if(that[FIRST] == entry)that[FIRST] = next;
+    if(that[LAST] == entry)that[LAST] = prev;
+    that[SIZE]--;
+  }
 
-  function collectionMethods($VALUES){
-    return {
-      // 23.1.3.1 Map.prototype.clear()
-      // 23.2.3.2 Set.prototype.clear()
-      clear: function(){
-        hidden(this, SIZE, 0);
-        hidden(this, KEYS, create(null));
-        if($VALUES == VALUES)hidden(this, VALUES, create(null));
-      },
-      // 23.1.3.3 Map.prototype.delete(key)
-      // 23.2.3.4 Set.prototype.delete(value)
-      'delete': function(key){
-        var index    = fastKey(key)
-          , keys     = this[KEYS]
-          , contains = index in keys;
-        if(contains){
-          delete keys[index];
-          if($VALUES == VALUES)delete this[VALUES][index];
-          this[SIZE]--;
-        }
-        return contains;
-      },
-      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
-      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
-      forEach: function(callbackfn, that /* = undefined */){
-        var f      = ctx(callbackfn, that, 3)
-          , values = this[$VALUES]
-          , keys   = this[KEYS]
-          , done   = {}
-          , k, index;
-        do {
-          for(index in keys){
-            if(index in done)continue;
-            done[index] = true;
-            f(values[index], keys[index], this);
-          }
-        } while((k = getKeys(keys)).length && k[k.length - 1] != index);
-      },
-      // 23.1.3.7 Map.prototype.has(key)
-      // 23.2.3.7 Set.prototype.has(value)
-      has: function(key){
-        return fastKey(key) in this[KEYS];
+  var collectionMethods = {
+    // 23.1.3.1 Map.prototype.clear()
+    // 23.2.3.2 Set.prototype.clear()
+    clear: function(){
+      var keys = this[DATA], index;
+      for(index in keys)del(this, keys, index);
+    },
+    // 23.1.3.3 Map.prototype.delete(key)
+    // 23.2.3.4 Set.prototype.delete(value)
+    'delete': function(key){
+      var keys     = this[DATA]
+        , index    = fastKey(key)
+        , contains = index in keys;
+      if(contains)del(this, keys, index);
+      return contains;
+    },
+    // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
+    // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
+    forEach: function(callbackfn, that /* = undefined */){
+      var f = ctx(callbackfn, that, 3)
+        , entry;
+      while(true){
+        while(entry && entry.r)entry = entry.p;
+        if(!(entry = entry ? entry.n : this[FIRST]))return;
+        f(entry.v, entry.k, this);
       }
+    },
+    // 23.1.3.7 Map.prototype.has(key)
+    // 23.2.3.7 Set.prototype.has(value)
+    has: function(key){
+      return fastKey(key) in this[DATA];
     }
@@ -1479,16 +1538,10 @@ }
     get: function(key){
-      return this[VALUES][fastKey(key)];
+      var entry = this[DATA][fastKey(key)];
+      return entry && entry.v;
     },
     // 23.1.3.9 Map.prototype.set(key, value)
     set: function(key, value){
-      var index  = fastKey(key, true)
-        , values = this[VALUES];
-      if(!(index in values)){
-        this[KEYS][index] = same(key, -0) ? 0 : key;
-        this[SIZE]++;
-      }
-      values[index] = value;
-      return this;
+      return def(this, same(key, -0) ? 0 : key, value);
     }
-  }, collectionMethods(VALUES), true);
+  }, collectionMethods, true);
   
@@ -1499,11 +1552,6 @@ // 23.2 Set Objects
     add: function(value){
-      var index  = fastKey(value, true)
-        , values = this[KEYS];
-      if(!(index in values)){
-        values[index] = same(value, -0) ? 0 : value;
-        this[SIZE]++;
-      }
-      return this;
+      value = same(value, -0) ? 0 : value;
+      return def(this, value, value);
     }
-  }, collectionMethods(KEYS));
+  }, collectionMethods);
   
@@ -1549,2 +1597,33 @@ function getWeakData(it){
   }, weakCollectionMethods, false, true);
+  
+  function defineCollectionIterators(C, NAME, DEFAULT){
+    // 23.2.5.1 CreateSetIterator Abstract Operation
+    // 23.1.5.1 CreateMapIterator Abstract Operation
+    defineStdIterators(C, NAME, function(iterated, kind){
+      set(this, ITER, {o: iterated, k: kind});
+    // 23.1.5.2.1 %MapIteratorPrototype%.next()
+    // 23.2.5.2.1 %SetIteratorPrototype%.next()
+    }, function(){
+      var iter = this[ITER]
+        , O    = iter.o
+        , last = iter.l
+        , entry;
+      while(iter.l && iter.l.r)iter.l = iter.l.p;
+      if(!O || !(iter.l = entry = iter.l ? iter.l.n : O[FIRST]))return (iter.o = undefined), iterResult(1);
+      switch(iter.k){
+        case KEY:   return iterResult(0, entry.k);
+        case VALUE: return iterResult(0, entry.v);
+      }             return iterResult(0, [entry.k, entry.v]);
+    }, DEFAULT);
+  }
+  // 23.1.3.4 Map.prototype.entries()
+  // 23.1.3.8 Map.prototype.keys()
+  // 23.1.3.11 Map.prototype.values()
+  // 23.1.3.12 Map.prototype[@@iterator]()
+  defineCollectionIterators(Map, MAP, KEY+VALUE);
+  // 23.2.3.5 Set.prototype.entries()
+  // 23.2.3.8 Set.prototype.keys()
+  // 23.2.3.10 Set.prototype.values()
+  // 23.2.3.11 Set.prototype[@@iterator]()
+  defineCollectionIterators(Set, SET, VALUE);
 }();
@@ -1565,2 +1644,16 @@
   });
+  
+  function createObjectToArray(isEntries){
+    return function(object){
+      var O      = ES5Object(object)
+        , keys   = getKeys(object)
+        , length = keys.length
+        , i      = 0
+        , result = Array(length)
+        , key;
+      if(isEntries)while(length > i)result[i] = [key = keys[i++], O[key]];
+      else while(length > i)result[i] = O[keys[i++]];
+      return result;
+    }
+  }
   $define(STATIC, OBJECT, {
@@ -1608,123 +1701,2 @@ // https://github.com/rwaldron/tc39-notes/blob/master/es6/2014-04/apr-9.md#51-objectentries-objectvalues
 /******************************************************************************
- * Module : es6_iterators                                                     *
- ******************************************************************************/
-
-// ECMAScript 6 iterators shim
-!function(){
-  var getValues = createObjectToArray(false)
-    // Safari define byggy iterators w/o `next`
-    , buggy = 'keys' in ArrayProto && !('next' in [].keys())
-    , at = createPointAt(true);
-  
-  function defineStdIterators(Base, NAME, Constructor, next, DEFAULT){
-    function createIter(kind){
-      return function(){
-        return new Constructor(this, kind);
-      }
-    }
-    // 21.1.5.2.2 %StringIteratorPrototype%[@@toStringTag]
-    // 22.1.5.2.3 %ArrayIteratorPrototype%[@@toStringTag]
-    // 23.1.5.2.3 %MapIteratorPrototype%[@@toStringTag]
-    // 23.2.5.2.3 %SetIteratorPrototype%[@@toStringTag]
-    createIterator(Constructor, NAME, next);
-    DEFAULT && $define(PROTO + FORCED * buggy, NAME, {
-      // 22.1.3.4 Array.prototype.entries()
-      // 23.1.3.4 Map.prototype.entries()
-      // 23.2.3.5 Set.prototype.entries()
-      entries: createIter(KEY+VALUE),
-      // 22.1.3.13 Array.prototype.keys()
-      // 23.1.3.8 Map.prototype.keys()
-      // 23.2.3.8 Set.prototype.keys()
-      keys:    createIter(KEY),
-      // 22.1.3.29 Array.prototype.values()
-      // 23.1.3.11 Map.prototype.values()
-      // 23.2.3.10 Set.prototype.values()
-      values:  createIter(VALUE)
-    });
-    // 21.1.3.27 String.prototype[@@iterator]()
-    // 22.1.3.30 Array.prototype[@@iterator]()
-    // 23.1.3.12 Map.prototype[@@iterator]()
-    // 23.2.3.11 Set.prototype[@@iterator]()
-    Base && defineIterator(Base, NAME, createIter(DEFAULT));
-  }
-  
-  // 21.1.5.1 CreateStringIterator Abstract Operation
-  defineStdIterators(String, STRING, function(iterated){
-    set(this, ITER, {o: String(iterated), i: 0});
-  // 21.1.5.2.1 %StringIteratorPrototype%.next()
-  }, function(){
-    var iter     = this[ITER]
-      , iterated = iter.o
-      , index    = iter.i
-      , point;
-    if(index >= iterated.length)return iterResult(1);
-    point = at.call(iterated, index);
-    iter.i += point.length;
-    return iterResult(0, point);
-  });
-  
-  // 22.1.5.1 CreateArrayIterator Abstract Operation
-  defineStdIterators(Array, ARRAY, function(iterated, kind){
-    set(this, ITER, {o: ES5Object(iterated), i: 0, k: kind});
-  // 22.1.5.2.1 %ArrayIteratorPrototype%.next()
-  }, function(){
-    var iter     = this[ITER]
-      , iterated = iter.o
-      , index    = iter.i++
-      , kind     = iter.k
-      , value;
-    if(index >= iterated.length)return iterResult(1);
-    if(kind == KEY)       value = index;
-    else if(kind == VALUE)value = iterated[index];
-    else                  value = [index, iterated[index]];
-    return iterResult(0, value);
-  }, VALUE);
-  
-  // argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7)
-  Iterators[ARGUMENTS] = Iterators[ARRAY];
-  
-  function getCollectionKeys(inst, C){
-    var keys;
-    if(C[SHIM])keys = getValues(inst[COLLECTION_KEYS]);
-    else inst[FOR_EACH](function(val, key){
-      this.push(C == Map ? key : val);
-    }, keys = []);
-    return keys;
-  }
-  
-  // 23.1.5.1 CreateMapIterator Abstract Operation
-  defineStdIterators(Map, MAP, function(iterated, kind){
-    set(this, ITER, {o: iterated, k: kind, a: getCollectionKeys(iterated, Map), i: 0});
-  // 23.1.5.2.1 %MapIteratorPrototype%.next()
-  }, function(){
-    var iter  = this[ITER]
-      , O     = iter.o
-      , keys  = iter.a
-      , index = iter.i++
-      , kind  = iter.k
-      , key, value;
-    if(index >= keys.length)return iterResult(1);
-    if(!O.has(key = keys[index]))return this.next();
-    if(kind == KEY)       value = key;
-    else if(kind == VALUE)value = O.get(key);
-    else                  value = [key, O.get(key)];
-    return iterResult(0, value);
-  }, KEY+VALUE);
-  
-  // 23.2.5.1 CreateSetIterator Abstract Operation
-  defineStdIterators(Set, SET, function(iterated, kind){
-    set(this, ITER, {o: iterated, k: kind, a: getCollectionKeys(iterated, Set).reverse()});
-  // 23.2.5.2.1 %SetIteratorPrototype%.next()
-  }, function(){
-    var iter = this[ITER]
-      , O    = iter.o
-      , keys = iter.a
-      , key; 
-    if(!keys.length)return iterResult(1);
-    if(!O.has(key = keys.pop()))return this.next();
-    return iterResult(0, iter.k == KEY+VALUE ? [key, key] : key);
-  }, VALUE);
-}();
-
-/******************************************************************************
  * Module : timers                                                            *
@@ -1731,0 +1703,0 @@ ******************************************************************************/

client/shim.min.js

 /**
- * Core.js 0.2.5
+ * Core.js 0.3.0
  * https://github.com/zloirock/core-js
@@ -7,3 +7,3 @@ * License: http://rock.mit-license.org
  */
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 //# sourceMappingURL=shim.min.map

package.json

 {
   "name": "core-js",
   "description": "Standard library",
-  "version": "0.2.5",
+  "version": "0.3.0",
   "repository": {
@@ -6,0 +6,0 @@ "type": "git",

README.md

@@ -77,3 +77,3 @@ # Core.js
 ### ECMAScript 6
-Module `es6`. [Symbols](#ecmascript-6-symbols), [collections](#ecmascript-6-collections), [iterators](#ecmascript-6-iterators) and [promises](#ecmascript-6-promises) in separate modules.
+Module `es6`. About iterators from this module [here](#ecmascript-6-iterators). [Symbols](#ecmascript-6-symbols), [collections](#ecmascript-6-collections) and [promises](#ecmascript-6-promises) in separate modules.
 #### ECMAScript 6: Object
@@ -280,3 +280,3 @@ ```javascript
 ### ECMAScript 6: Collections
-Module `es6_collections`, iterators for them are defined in [es6_iterators](#ecmascript-6-iterators).
+Module `es6_collections`. About iterators from this module [here](#ecmascript-6-iterators).
 
@@ -398,3 +398,3 @@ #### Map
 ### ECMAScript 6: Iterators
-Module `es6_iterators`.
+Module `es6`:
 ```javascript
@@ -408,2 +408,7 @@ String
   #@@iterator() -> iterator
+Arguments
+  #@@iterator() -> iterator (sham, available only in core-js methods)
+```
+Module `es6_collections`:
+```javascript
 Set
@@ -419,4 +424,2 @@ #values() -> iterator
   #@@iterator() -> iterator (entries)
-Arguments
-  #@@iterator() -> iterator (sham, available only in core-js methods)
 ```
@@ -908,10 +911,10 @@ [Example](http://goo.gl/3s27dC):
 
-for(var key of Dict.keys(dict))console(key); // => 'a', 'b', 'c'
+for(var key of Dict.keys(dict))console.log(key); // => 'a', 'b', 'c'
 
 for(var [key, val] of Dict.entries(dict)){
-  console(key); // => 'a', 'b', 'c'
-  console(val); // => 1, 2, 3
+  console.log(key); // => 'a', 'b', 'c'
+  console.log(val); // => 1, 2, 3
 }
 
-$for(Dict.values(dict)).of(console); // => 1, 2, 3
+$for(Dict.values(dict)).of(console.log); // => 1, 2, 3
 
@@ -997,9 +1000,9 @@ new Map(Dict.entries(dict)); // => Map {a: 1, b: 2, c: 3}
 ```javascript
-var fn1 = log.part(1, 2);
+var fn1 = console.log.part(1, 2);
 fn1(3, 4);    // => 1, 2, 3, 4
 
-var fn2 = log.part(_, 2, _, 4);
+var fn2 = console.log.part(_, 2, _, 4);
 fn2(1, 3);    // => 1, 2, 3, 4
 
-var fn3 = log.part(1, _, _, 4);
+var fn3 = console.log.part(1, _, _, 4);
 fn3(2, 3);    // => 1, 2, 3, 4
@@ -1110,5 +1113,5 @@
 ```javascript
-for(var i of 3)console(i); // => 0, 1, 2
+for(var i of 3)console.log(i); // => 0, 1, 2
 
-$for(3).of(console); // => 0, 1, 2
+$for(3).of(console.log); // => 0, 1, 2
 
@@ -1190,2 +1193,7 @@ Array.from(10, Math.random); // => [0.9817775336559862, 0.02720663254149258, ...]
 ## Changelog
+**0.3.0** - *2014.12.23* - Optimize `Map` & `Set`
+  * use entries chain on hash table
+  * fast & correct iteration
+  * iterators moved to `es6` and `es6_collections` modules
+
 **0.2.5** - *2014.12.20*
@@ -1192,0 +1200,0 @@ * `console` no longer shortcut for `console.log` (compatibility problems)

shim.js

 /**
- * Core.js 0.2.5
+ * Core.js 0.3.0
  * https://github.com/zloirock/core-js
@@ -180,2 +180,5 @@ * License: http://rock.mit-license.org
   , ES5Object        = Object;
+function get(object, key){
+  if(has(object, key))return object[key];
+}
 // 19.1.2.1 Object.assign(target, source, ...)
@@ -196,15 +199,2 @@ var assign = Object.assign || function(target, source){
 }
-function createObjectToArray(isEntries){
-  return function(object){
-    var O      = ES5Object(object)
-      , keys   = getKeys(object)
-      , length = keys.length
-      , i      = 0
-      , result = Array(length)
-      , key;
-    if(isEntries)while(length > i)result[i] = [key = keys[i++], O[key]];
-    else while(length > i)result[i] = O[keys[i++]];
-    return result;
-  }
-}
 function keyOf(object, el){
@@ -412,3 +402,2 @@ var O      = ES5Object(object)
   , ITER  = safeSymbol('iter')
-  , SHIM  = safeSymbol('shim')
   , KEY   = 1
@@ -418,3 +407,5 @@ , VALUE = 2
   , IteratorPrototype = {}
-  , COLLECTION_KEYS;
+  , NATIVE_ITERATORS = SYMBOL_ITERATOR in ArrayProto
+    // Safari define byggy iterators w/o `next`
+  , BUGGY_ITERATORS = 'keys' in ArrayProto && !('next' in [].keys());
 // 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
@@ -431,10 +422,5 @@ setIterator(IteratorPrototype, returnThis);
 }
-function defineIterator(Constructor, NAME, value){
-  var proto       = Constructor[PROTOTYPE]
-    , HAS_FF_ITER = has(proto, FF_ITERATOR);
-  var iter = has(proto, SYMBOL_ITERATOR)
-    ? proto[SYMBOL_ITERATOR]
-    : HAS_FF_ITER
-      ? proto[FF_ITERATOR]
-      : value;
+function defineIterator(Constructor, NAME, value, DEFAULT){
+  var proto = Constructor[PROTOTYPE]
+    , iter  = get(proto, SYMBOL_ITERATOR) || get(proto, FF_ITERATOR) || (DEFAULT && get(proto, DEFAULT)) || value;
   if(framework){
@@ -448,3 +434,3 @@ // Define iterator
       // FF fix
-      HAS_FF_ITER && setIterator(iterProto, returnThis);
+      has(proto, FF_ITERATOR) && setIterator(iterProto, returnThis);
     }
@@ -457,2 +443,16 @@ }
 }
+function defineStdIterators(Base, NAME, Constructor, next, DEFAULT){
+  function createIter(kind){
+    return function(){
+      return new Constructor(this, kind);
+    }
+  }
+  createIterator(Constructor, NAME, next);
+  defineIterator(Base, NAME, createIter(DEFAULT), DEFAULT == VALUE ? 'values' : 'entries');
+  DEFAULT && $define(PROTO + FORCED * BUGGY_ITERATORS, NAME, {
+    entries: createIter(KEY+VALUE),
+    keys:    createIter(KEY),
+    values:  createIter(VALUE)
+  });
+}
 function iterResult(done, value){
@@ -651,3 +651,4 @@ return {value: value, done: !!done};
     , sqrt = Math.sqrt
-    , fcc  = String.fromCharCode;
+    , fcc  = String.fromCharCode
+    , at   = createPointAt(true);
   // 20.2.2.5 Math.asinh(x)
@@ -827,2 +828,17 @@ function asinh(x){
   });
+  // 21.1.3.27 String.prototype[@@iterator]()
+  // 21.1.5.1 CreateStringIterator Abstract Operation
+  defineStdIterators(String, STRING, function(iterated){
+    set(this, ITER, {o: String(iterated), i: 0});
+  // 21.1.5.2.1 %StringIteratorPrototype%.next()
+  }, function(){
+    var iter  = this[ITER]
+      , O     = iter.o
+      , index = iter.i
+      , point;
+    if(index >= O.length)return iterResult(1);
+    point = at.call(O, index);
+    iter.i += point.length;
+    return iterResult(0, point);
+  });
   
@@ -892,3 +908,24 @@ $define(STATIC, ARRAY, {
   });
+  // 22.1.3.4 Array.prototype.entries()
+  // 22.1.3.13 Array.prototype.keys()
+  // 22.1.3.29 Array.prototype.values()
+  // 22.1.3.30 Array.prototype[@@iterator]()
+  // 22.1.5.1 CreateArrayIterator Abstract Operation
+  defineStdIterators(Array, ARRAY, function(iterated, kind){
+    set(this, ITER, {o: ES5Object(iterated), i: 0, k: kind});
+  // 22.1.5.2.1 %ArrayIteratorPrototype%.next()
+  }, function(){
+    var iter  = this[ITER]
+      , O     = iter.o
+      , index = iter.i++;
+    if(!O || index >= O.length)return (iter.o = undefined), iterResult(1);
+    switch(iter.k){
+      case KEY:   return iterResult(0, index);
+      case VALUE: return iterResult(0, O[index]);
+    }             return iterResult(0, [index, O[index]]);
+  }, VALUE);
   
+  // argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7)
+  Iterators[ARGUMENTS] = Iterators[ARRAY];
+  
   // 24.3.3 JSON[@@toStringTag]
@@ -1136,5 +1173,6 @@ setToStringTag(global.JSON, 'JSON', true);
 !function(){
-  var KEYS     = COLLECTION_KEYS = safeSymbol('keys')
-    , VALUES   = safeSymbol('values')
-    , STOREID  = safeSymbol('storeId')
+  var DATA     = safeSymbol('data')
+    , UID      = safeSymbol('uid')
+    , LAST     = safeSymbol('last')
+    , FIRST    = safeSymbol('first')
     , WEAKDATA = safeSymbol('weakData')
@@ -1146,24 +1184,33 @@ , WEAKID   = safeSymbol('weakId')
   
-  function wrapSVZ(method, chain){
-    return function(a, b){
+  function fixSVZ(proto, key, method, chain){
+    framework && hidden(proto, key, function(a, b){
       var result = method.call(this, same(a, -0) ? 0 : a, b);
       return chain ? this : result;
-    }
+    });
   }
   function getCollection(C, NAME, methods, commonMethods, isMap, isWeak){
-    var ADDER_KEY = isMap ? 'set' : 'add'
-      , init      = commonMethods.clear
-      , O         = {};
+    var ADDER = isMap ? 'set' : 'add'
+      , proto = C && C[PROTOTYPE]
+      , O     = {};
     function initFromIterable(that, iterable){
-      if(iterable != undefined)forOf(iterable, isMap, that[ADDER_KEY], that);
+      if(iterable != undefined)forOf(iterable, isMap, that[ADDER], that);
       return that;
     }
-    if(!(isNative(C) && (isWeak || has(C[PROTOTYPE], FOR_EACH)))){
+    if(BUGGY_ITERATORS || !(isNative(C) && (isWeak || (has(proto, FOR_EACH) && has(proto, 'entries'))))){
       // create collection constructor
-      C = function(iterable){
-        assertInstance(this, C, NAME);
-        isWeak ? hidden(this, WEAKID, wid++) : init.call(this);
-        initFromIterable(this, iterable);
-      }
-      set(C, SHIM, true);
+      C = isWeak
+        ? function(iterable){
+            assertInstance(this, C, NAME);
+            set(this, WEAKID, wid++);
+            initFromIterable(this, iterable);
+          }
+        : function(iterable){
+            var that = this;
+            assertInstance(that, C, NAME);
+            set(that, DATA, create(null));
+            set(that, SIZE, 0);
+            set(that, LAST, undefined);
+            set(that, FIRST, undefined);
+            initFromIterable(that, iterable);
+          };
       assignHidden(assignHidden(C[PROTOTYPE], methods), commonMethods);
@@ -1175,8 +1222,7 @@ isWeak || defineProperty(C[PROTOTYPE], 'size', {get: function(){
       var Native = C
-        , proto  = C[PROTOTYPE]
         , inst   = new C
-        , chain  = inst[ADDER_KEY](isWeak ? {} : -0, 1)
+        , chain  = inst[ADDER](isWeak ? {} : -0, 1)
         , buggyZero;
       // wrap to init collections from iterable
-      if(!(SYMBOL_ITERATOR in ArrayProto && C.length)){
+      if(!NATIVE_ITERATORS || !C.length){
         C = function(iterable){
@@ -1191,12 +1237,10 @@ assertInstance(this, C, NAME);
       });
-      if(framework){
-        // fix converting -0 key to +0
-        if(buggyZero){
-          hidden(proto, 'delete', wrapSVZ(proto['delete']));
-          hidden(proto, 'has', wrapSVZ(proto.has));
-          isMap && hidden(proto, 'get', wrapSVZ(proto.get));
-        }
-        // fix .add & .set for chaining
-        if(buggyZero || chain !== inst)hidden(proto, ADDER_KEY, wrapSVZ(proto[ADDER_KEY], true));
+      // fix converting -0 key to +0
+      if(buggyZero){
+        fixSVZ(proto, 'delete', proto['delete']);
+        fixSVZ(proto, 'has', proto.has);
+        isMap && fixSVZ(proto, 'get', proto.get);
       }
+      // fix .add & .set for chaining
+      if(buggyZero || chain !== inst)fixSVZ(proto, ADDER, proto[ADDER], true);
     }
@@ -1213,53 +1257,68 @@ setToStringTag(C, NAME);
     // if it hasn't object id - add next
-    if(!has(it, STOREID)){
-      if(create)hidden(it, STOREID, ++uid);
+    if(!has(it, UID)){
+      if(create)hidden(it, UID, ++uid);
       else return '';
     }
     // return object id with 'O' prefix
-    return 'O' + it[STOREID];
+    return 'O' + it[UID];
   }
+  
+  function def(that, key, value){
+    var index  = fastKey(key, true)
+      , values = that[DATA]
+      , last   = that[LAST]
+      , entry;
+    if(index in values)values[index].v = value;
+    else {
+      entry = values[index] = {k: key, v: value, p: last};
+      if(!that[FIRST])that[FIRST] = entry;
+      if(last)last.n = entry;
+      that[LAST] = entry;
+      that[SIZE]++;
+    } return that;
+  }
+  function del(that, keys, index){
+    var entry = keys[index]
+      , next  = entry.n
+      , prev  = entry.p;
+    delete keys[index];
+    entry.r = true;
+    if(prev)prev.n = next;
+    if(next)next.p = prev;
+    if(that[FIRST] == entry)that[FIRST] = next;
+    if(that[LAST] == entry)that[LAST] = prev;
+    that[SIZE]--;
+  }
 
-  function collectionMethods($VALUES){
-    return {
-      // 23.1.3.1 Map.prototype.clear()
-      // 23.2.3.2 Set.prototype.clear()
-      clear: function(){
-        hidden(this, SIZE, 0);
-        hidden(this, KEYS, create(null));
-        if($VALUES == VALUES)hidden(this, VALUES, create(null));
-      },
-      // 23.1.3.3 Map.prototype.delete(key)
-      // 23.2.3.4 Set.prototype.delete(value)
-      'delete': function(key){
-        var index    = fastKey(key)
-          , keys     = this[KEYS]
-          , contains = index in keys;
-        if(contains){
-          delete keys[index];
-          if($VALUES == VALUES)delete this[VALUES][index];
-          this[SIZE]--;
-        }
-        return contains;
-      },
-      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
-      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
-      forEach: function(callbackfn, that /* = undefined */){
-        var f      = ctx(callbackfn, that, 3)
-          , values = this[$VALUES]
-          , keys   = this[KEYS]
-          , done   = {}
-          , k, index;
-        do {
-          for(index in keys){
-            if(index in done)continue;
-            done[index] = true;
-            f(values[index], keys[index], this);
-          }
-        } while((k = getKeys(keys)).length && k[k.length - 1] != index);
-      },
-      // 23.1.3.7 Map.prototype.has(key)
-      // 23.2.3.7 Set.prototype.has(value)
-      has: function(key){
-        return fastKey(key) in this[KEYS];
+  var collectionMethods = {
+    // 23.1.3.1 Map.prototype.clear()
+    // 23.2.3.2 Set.prototype.clear()
+    clear: function(){
+      var keys = this[DATA], index;
+      for(index in keys)del(this, keys, index);
+    },
+    // 23.1.3.3 Map.prototype.delete(key)
+    // 23.2.3.4 Set.prototype.delete(value)
+    'delete': function(key){
+      var keys     = this[DATA]
+        , index    = fastKey(key)
+        , contains = index in keys;
+      if(contains)del(this, keys, index);
+      return contains;
+    },
+    // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
+    // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
+    forEach: function(callbackfn, that /* = undefined */){
+      var f = ctx(callbackfn, that, 3)
+        , entry;
+      while(true){
+        while(entry && entry.r)entry = entry.p;
+        if(!(entry = entry ? entry.n : this[FIRST]))return;
+        f(entry.v, entry.k, this);
       }
+    },
+    // 23.1.3.7 Map.prototype.has(key)
+    // 23.2.3.7 Set.prototype.has(value)
+    has: function(key){
+      return fastKey(key) in this[DATA];
     }
@@ -1272,16 +1331,10 @@ }
     get: function(key){
-      return this[VALUES][fastKey(key)];
+      var entry = this[DATA][fastKey(key)];
+      return entry && entry.v;
     },
     // 23.1.3.9 Map.prototype.set(key, value)
     set: function(key, value){
-      var index  = fastKey(key, true)
-        , values = this[VALUES];
-      if(!(index in values)){
-        this[KEYS][index] = same(key, -0) ? 0 : key;
-        this[SIZE]++;
-      }
-      values[index] = value;
-      return this;
+      return def(this, same(key, -0) ? 0 : key, value);
     }
-  }, collectionMethods(VALUES), true);
+  }, collectionMethods, true);
   
@@ -1292,11 +1345,6 @@ // 23.2 Set Objects
     add: function(value){
-      var index  = fastKey(value, true)
-        , values = this[KEYS];
-      if(!(index in values)){
-        values[index] = same(value, -0) ? 0 : value;
-        this[SIZE]++;
-      }
-      return this;
+      value = same(value, -0) ? 0 : value;
+      return def(this, value, value);
     }
-  }, collectionMethods(KEYS));
+  }, collectionMethods);
   
@@ -1342,2 +1390,33 @@ function getWeakData(it){
   }, weakCollectionMethods, false, true);
+  
+  function defineCollectionIterators(C, NAME, DEFAULT){
+    // 23.2.5.1 CreateSetIterator Abstract Operation
+    // 23.1.5.1 CreateMapIterator Abstract Operation
+    defineStdIterators(C, NAME, function(iterated, kind){
+      set(this, ITER, {o: iterated, k: kind});
+    // 23.1.5.2.1 %MapIteratorPrototype%.next()
+    // 23.2.5.2.1 %SetIteratorPrototype%.next()
+    }, function(){
+      var iter = this[ITER]
+        , O    = iter.o
+        , last = iter.l
+        , entry;
+      while(iter.l && iter.l.r)iter.l = iter.l.p;
+      if(!O || !(iter.l = entry = iter.l ? iter.l.n : O[FIRST]))return (iter.o = undefined), iterResult(1);
+      switch(iter.k){
+        case KEY:   return iterResult(0, entry.k);
+        case VALUE: return iterResult(0, entry.v);
+      }             return iterResult(0, [entry.k, entry.v]);
+    }, DEFAULT);
+  }
+  // 23.1.3.4 Map.prototype.entries()
+  // 23.1.3.8 Map.prototype.keys()
+  // 23.1.3.11 Map.prototype.values()
+  // 23.1.3.12 Map.prototype[@@iterator]()
+  defineCollectionIterators(Map, MAP, KEY+VALUE);
+  // 23.2.3.5 Set.prototype.entries()
+  // 23.2.3.8 Set.prototype.keys()
+  // 23.2.3.10 Set.prototype.values()
+  // 23.2.3.11 Set.prototype[@@iterator]()
+  defineCollectionIterators(Set, SET, VALUE);
 }();
@@ -1358,2 +1437,16 @@
   });
+  
+  function createObjectToArray(isEntries){
+    return function(object){
+      var O      = ES5Object(object)
+        , keys   = getKeys(object)
+        , length = keys.length
+        , i      = 0
+        , result = Array(length)
+        , key;
+      if(isEntries)while(length > i)result[i] = [key = keys[i++], O[key]];
+      else while(length > i)result[i] = O[keys[i++]];
+      return result;
+    }
+  }
   $define(STATIC, OBJECT, {
@@ -1401,123 +1494,2 @@ // https://github.com/rwaldron/tc39-notes/blob/master/es6/2014-04/apr-9.md#51-objectentries-objectvalues
 /******************************************************************************
- * Module : es6_iterators                                                     *
- ******************************************************************************/
-
-// ECMAScript 6 iterators shim
-!function(){
-  var getValues = createObjectToArray(false)
-    // Safari define byggy iterators w/o `next`
-    , buggy = 'keys' in ArrayProto && !('next' in [].keys())
-    , at = createPointAt(true);
-  
-  function defineStdIterators(Base, NAME, Constructor, next, DEFAULT){
-    function createIter(kind){
-      return function(){
-        return new Constructor(this, kind);
-      }
-    }
-    // 21.1.5.2.2 %StringIteratorPrototype%[@@toStringTag]
-    // 22.1.5.2.3 %ArrayIteratorPrototype%[@@toStringTag]
-    // 23.1.5.2.3 %MapIteratorPrototype%[@@toStringTag]
-    // 23.2.5.2.3 %SetIteratorPrototype%[@@toStringTag]
-    createIterator(Constructor, NAME, next);
-    DEFAULT && $define(PROTO + FORCED * buggy, NAME, {
-      // 22.1.3.4 Array.prototype.entries()
-      // 23.1.3.4 Map.prototype.entries()
-      // 23.2.3.5 Set.prototype.entries()
-      entries: createIter(KEY+VALUE),
-      // 22.1.3.13 Array.prototype.keys()
-      // 23.1.3.8 Map.prototype.keys()
-      // 23.2.3.8 Set.prototype.keys()
-      keys:    createIter(KEY),
-      // 22.1.3.29 Array.prototype.values()
-      // 23.1.3.11 Map.prototype.values()
-      // 23.2.3.10 Set.prototype.values()
-      values:  createIter(VALUE)
-    });
-    // 21.1.3.27 String.prototype[@@iterator]()
-    // 22.1.3.30 Array.prototype[@@iterator]()
-    // 23.1.3.12 Map.prototype[@@iterator]()
-    // 23.2.3.11 Set.prototype[@@iterator]()
-    Base && defineIterator(Base, NAME, createIter(DEFAULT));
-  }
-  
-  // 21.1.5.1 CreateStringIterator Abstract Operation
-  defineStdIterators(String, STRING, function(iterated){
-    set(this, ITER, {o: String(iterated), i: 0});
-  // 21.1.5.2.1 %StringIteratorPrototype%.next()
-  }, function(){
-    var iter     = this[ITER]
-      , iterated = iter.o
-      , index    = iter.i
-      , point;
-    if(index >= iterated.length)return iterResult(1);
-    point = at.call(iterated, index);
-    iter.i += point.length;
-    return iterResult(0, point);
-  });
-  
-  // 22.1.5.1 CreateArrayIterator Abstract Operation
-  defineStdIterators(Array, ARRAY, function(iterated, kind){
-    set(this, ITER, {o: ES5Object(iterated), i: 0, k: kind});
-  // 22.1.5.2.1 %ArrayIteratorPrototype%.next()
-  }, function(){
-    var iter     = this[ITER]
-      , iterated = iter.o
-      , index    = iter.i++
-      , kind     = iter.k
-      , value;
-    if(index >= iterated.length)return iterResult(1);
-    if(kind == KEY)       value = index;
-    else if(kind == VALUE)value = iterated[index];
-    else                  value = [index, iterated[index]];
-    return iterResult(0, value);
-  }, VALUE);
-  
-  // argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7)
-  Iterators[ARGUMENTS] = Iterators[ARRAY];
-  
-  function getCollectionKeys(inst, C){
-    var keys;
-    if(C[SHIM])keys = getValues(inst[COLLECTION_KEYS]);
-    else inst[FOR_EACH](function(val, key){
-      this.push(C == Map ? key : val);
-    }, keys = []);
-    return keys;
-  }
-  
-  // 23.1.5.1 CreateMapIterator Abstract Operation
-  defineStdIterators(Map, MAP, function(iterated, kind){
-    set(this, ITER, {o: iterated, k: kind, a: getCollectionKeys(iterated, Map), i: 0});
-  // 23.1.5.2.1 %MapIteratorPrototype%.next()
-  }, function(){
-    var iter  = this[ITER]
-      , O     = iter.o
-      , keys  = iter.a
-      , index = iter.i++
-      , kind  = iter.k
-      , key, value;
-    if(index >= keys.length)return iterResult(1);
-    if(!O.has(key = keys[index]))return this.next();
-    if(kind == KEY)       value = key;
-    else if(kind == VALUE)value = O.get(key);
-    else                  value = [key, O.get(key)];
-    return iterResult(0, value);
-  }, KEY+VALUE);
-  
-  // 23.2.5.1 CreateSetIterator Abstract Operation
-  defineStdIterators(Set, SET, function(iterated, kind){
-    set(this, ITER, {o: iterated, k: kind, a: getCollectionKeys(iterated, Set).reverse()});
-  // 23.2.5.2.1 %SetIteratorPrototype%.next()
-  }, function(){
-    var iter = this[ITER]
-      , O    = iter.o
-      , keys = iter.a
-      , key; 
-    if(!keys.length)return iterResult(1);
-    if(!O.has(key = keys.pop()))return this.next();
-    return iterResult(0, iter.k == KEY+VALUE ? [key, key] : key);
-  }, VALUE);
-}();
-
-/******************************************************************************
  * Module : array_statics                                                     *
@@ -1524,0 +1496,0 @@ ******************************************************************************/

src/common.js

@@ -167,2 +167,5 @@ var global          = returnThis()
   , ES5Object        = Object;
+function get(object, key){
+  if(has(object, key))return object[key];
+}
 // 19.1.2.1 Object.assign(target, source, ...)
@@ -183,15 +186,2 @@ var assign = Object.assign || function(target, source){
 }
-function createObjectToArray(isEntries){
-  return function(object){
-    var O      = ES5Object(object)
-      , keys   = getKeys(object)
-      , length = keys.length
-      , i      = 0
-      , result = Array(length)
-      , key;
-    if(isEntries)while(length > i)result[i] = [key = keys[i++], O[key]];
-    else while(length > i)result[i] = O[keys[i++]];
-    return result;
-  }
-}
 function keyOf(object, el){
@@ -399,3 +389,2 @@ var O      = ES5Object(object)
   , ITER  = safeSymbol('iter')
-  , SHIM  = safeSymbol('shim')
   , KEY   = 1
@@ -405,3 +394,5 @@ , VALUE = 2
   , IteratorPrototype = {}
-  , COLLECTION_KEYS;
+  , NATIVE_ITERATORS = SYMBOL_ITERATOR in ArrayProto
+    // Safari define byggy iterators w/o `next`
+  , BUGGY_ITERATORS = 'keys' in ArrayProto && !('next' in [].keys());
 // 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
@@ -418,10 +409,5 @@ setIterator(IteratorPrototype, returnThis);
 }
-function defineIterator(Constructor, NAME, value){
-  var proto       = Constructor[PROTOTYPE]
-    , HAS_FF_ITER = has(proto, FF_ITERATOR);
-  var iter = has(proto, SYMBOL_ITERATOR)
-    ? proto[SYMBOL_ITERATOR]
-    : HAS_FF_ITER
-      ? proto[FF_ITERATOR]
-      : value;
+function defineIterator(Constructor, NAME, value, DEFAULT){
+  var proto = Constructor[PROTOTYPE]
+    , iter  = get(proto, SYMBOL_ITERATOR) || get(proto, FF_ITERATOR) || (DEFAULT && get(proto, DEFAULT)) || value;
   if(framework){
@@ -435,3 +421,3 @@ // Define iterator
       // FF fix
-      HAS_FF_ITER && setIterator(iterProto, returnThis);
+      has(proto, FF_ITERATOR) && setIterator(iterProto, returnThis);
     }
@@ -444,2 +430,16 @@ }
 }
+function defineStdIterators(Base, NAME, Constructor, next, DEFAULT){
+  function createIter(kind){
+    return function(){
+      return new Constructor(this, kind);
+    }
+  }
+  createIterator(Constructor, NAME, next);
+  defineIterator(Base, NAME, createIter(DEFAULT), DEFAULT == VALUE ? 'values' : 'entries');
+  DEFAULT && $define(PROTO + FORCED * BUGGY_ITERATORS, NAME, {
+    entries: createIter(KEY+VALUE),
+    keys:    createIter(KEY),
+    values:  createIter(VALUE)
+  });
+}
 function iterResult(done, value){
@@ -446,0 +446,0 @@ return {value: value, done: !!done};

src/dict.js

@@ -22,13 +22,12 @@ !function(DICT){
       , O     = iter.o
-      , index = iter.i++
       , keys  = iter.a
       , kind  = iter.k
-      , key, value;
-    if(index >= keys.length)return iterResult(1);
-    key = keys[index];
-    if(!has(O, key))return this.next();
-    if(kind == KEY)       value = key;
-    else if(kind == VALUE)value = O[key];
-    else                  value = [key, O[key]];
-    return iterResult(0, value);
+      , key;
+    while(true){
+      if(iter.i >= keys.length)return iterResult(1);
+      if(has(O, key = keys[iter.i++]))break;
+    }
+    if(kind == KEY)  return iterResult(0, key);
+    if(kind == VALUE)return iterResult(0, O[key]);
+                     return iterResult(0, [key, O[key]]);    
   });
@@ -121,5 +120,3 @@ function createDictIter(kind){
     has: has,
-    get: function(object, key){
-      if(has(object, key))return object[key];
-    },
+    get: get,
     set: createDefiner(0),
@@ -126,0 +123,0 @@ isDict: function(it){

src/es6_collections.js

 // ECMAScript 6 collections shim
 !function(){
-  var KEYS     = COLLECTION_KEYS = safeSymbol('keys')
-    , VALUES   = safeSymbol('values')
-    , STOREID  = safeSymbol('storeId')
+  var DATA     = safeSymbol('data')
+    , UID      = safeSymbol('uid')
+    , LAST     = safeSymbol('last')
+    , FIRST    = safeSymbol('first')
     , WEAKDATA = safeSymbol('weakData')
@@ -12,24 +13,33 @@ , WEAKID   = safeSymbol('weakId')
   
-  function wrapSVZ(method, chain){
-    return function(a, b){
+  function fixSVZ(proto, key, method, chain){
+    framework && hidden(proto, key, function(a, b){
       var result = method.call(this, same(a, -0) ? 0 : a, b);
       return chain ? this : result;
-    }
+    });
   }
   function getCollection(C, NAME, methods, commonMethods, isMap, isWeak){
-    var ADDER_KEY = isMap ? 'set' : 'add'
-      , init      = commonMethods.clear
-      , O         = {};
+    var ADDER = isMap ? 'set' : 'add'
+      , proto = C && C[PROTOTYPE]
+      , O     = {};
     function initFromIterable(that, iterable){
-      if(iterable != undefined)forOf(iterable, isMap, that[ADDER_KEY], that);
+      if(iterable != undefined)forOf(iterable, isMap, that[ADDER], that);
       return that;
     }
-    if(!(isNative(C) && (isWeak || has(C[PROTOTYPE], FOR_EACH)))){
+    if(BUGGY_ITERATORS || !(isNative(C) && (isWeak || (has(proto, FOR_EACH) && has(proto, 'entries'))))){
       // create collection constructor
-      C = function(iterable){
-        assertInstance(this, C, NAME);
-        isWeak ? hidden(this, WEAKID, wid++) : init.call(this);
-        initFromIterable(this, iterable);
-      }
-      set(C, SHIM, true);
+      C = isWeak
+        ? function(iterable){
+            assertInstance(this, C, NAME);
+            set(this, WEAKID, wid++);
+            initFromIterable(this, iterable);
+          }
+        : function(iterable){
+            var that = this;
+            assertInstance(that, C, NAME);
+            set(that, DATA, create(null));
+            set(that, SIZE, 0);
+            set(that, LAST, undefined);
+            set(that, FIRST, undefined);
+            initFromIterable(that, iterable);
+          };
       assignHidden(assignHidden(C[PROTOTYPE], methods), commonMethods);
@@ -41,8 +51,7 @@ isWeak || defineProperty(C[PROTOTYPE], 'size', {get: function(){
       var Native = C
-        , proto  = C[PROTOTYPE]
         , inst   = new C
-        , chain  = inst[ADDER_KEY](isWeak ? {} : -0, 1)
+        , chain  = inst[ADDER](isWeak ? {} : -0, 1)
         , buggyZero;
       // wrap to init collections from iterable
-      if(!(SYMBOL_ITERATOR in ArrayProto && C.length)){
+      if(!NATIVE_ITERATORS || !C.length){
         C = function(iterable){
@@ -57,12 +66,10 @@ assertInstance(this, C, NAME);
       });
-      if(framework){
-        // fix converting -0 key to +0
-        if(buggyZero){
-          hidden(proto, 'delete', wrapSVZ(proto['delete']));
-          hidden(proto, 'has', wrapSVZ(proto.has));
-          isMap && hidden(proto, 'get', wrapSVZ(proto.get));
-        }
-        // fix .add & .set for chaining
-        if(buggyZero || chain !== inst)hidden(proto, ADDER_KEY, wrapSVZ(proto[ADDER_KEY], true));
+      // fix converting -0 key to +0
+      if(buggyZero){
+        fixSVZ(proto, 'delete', proto['delete']);
+        fixSVZ(proto, 'has', proto.has);
+        isMap && fixSVZ(proto, 'get', proto.get);
       }
+      // fix .add & .set for chaining
+      if(buggyZero || chain !== inst)fixSVZ(proto, ADDER, proto[ADDER], true);
     }
@@ -79,53 +86,68 @@ setToStringTag(C, NAME);
     // if it hasn't object id - add next
-    if(!has(it, STOREID)){
-      if(create)hidden(it, STOREID, ++uid);
+    if(!has(it, UID)){
+      if(create)hidden(it, UID, ++uid);
       else return '';
     }
     // return object id with 'O' prefix
-    return 'O' + it[STOREID];
+    return 'O' + it[UID];
   }
+  
+  function def(that, key, value){
+    var index  = fastKey(key, true)
+      , values = that[DATA]
+      , last   = that[LAST]
+      , entry;
+    if(index in values)values[index].v = value;
+    else {
+      entry = values[index] = {k: key, v: value, p: last};
+      if(!that[FIRST])that[FIRST] = entry;
+      if(last)last.n = entry;
+      that[LAST] = entry;
+      that[SIZE]++;
+    } return that;
+  }
+  function del(that, keys, index){
+    var entry = keys[index]
+      , next  = entry.n
+      , prev  = entry.p;
+    delete keys[index];
+    entry.r = true;
+    if(prev)prev.n = next;
+    if(next)next.p = prev;
+    if(that[FIRST] == entry)that[FIRST] = next;
+    if(that[LAST] == entry)that[LAST] = prev;
+    that[SIZE]--;
+  }
 
-  function collectionMethods($VALUES){
-    return {
-      // 23.1.3.1 Map.prototype.clear()
-      // 23.2.3.2 Set.prototype.clear()
-      clear: function(){
-        hidden(this, SIZE, 0);
-        hidden(this, KEYS, create(null));
-        if($VALUES == VALUES)hidden(this, VALUES, create(null));
-      },
-      // 23.1.3.3 Map.prototype.delete(key)
-      // 23.2.3.4 Set.prototype.delete(value)
-      'delete': function(key){
-        var index    = fastKey(key)
-          , keys     = this[KEYS]
-          , contains = index in keys;
-        if(contains){
-          delete keys[index];
-          if($VALUES == VALUES)delete this[VALUES][index];
-          this[SIZE]--;
-        }
-        return contains;
-      },
-      // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
-      // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
-      forEach: function(callbackfn, that /* = undefined */){
-        var f      = ctx(callbackfn, that, 3)
-          , values = this[$VALUES]
-          , keys   = this[KEYS]
-          , done   = {}
-          , k, index;
-        do {
-          for(index in keys){
-            if(index in done)continue;
-            done[index] = true;
-            f(values[index], keys[index], this);
-          }
-        } while((k = getKeys(keys)).length && k[k.length - 1] != index);
-      },
-      // 23.1.3.7 Map.prototype.has(key)
-      // 23.2.3.7 Set.prototype.has(value)
-      has: function(key){
-        return fastKey(key) in this[KEYS];
+  var collectionMethods = {
+    // 23.1.3.1 Map.prototype.clear()
+    // 23.2.3.2 Set.prototype.clear()
+    clear: function(){
+      var keys = this[DATA], index;
+      for(index in keys)del(this, keys, index);
+    },
+    // 23.1.3.3 Map.prototype.delete(key)
+    // 23.2.3.4 Set.prototype.delete(value)
+    'delete': function(key){
+      var keys     = this[DATA]
+        , index    = fastKey(key)
+        , contains = index in keys;
+      if(contains)del(this, keys, index);
+      return contains;
+    },
+    // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
+    // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
+    forEach: function(callbackfn, that /* = undefined */){
+      var f = ctx(callbackfn, that, 3)
+        , entry;
+      while(true){
+        while(entry && entry.r)entry = entry.p;
+        if(!(entry = entry ? entry.n : this[FIRST]))return;
+        f(entry.v, entry.k, this);
       }
+    },
+    // 23.1.3.7 Map.prototype.has(key)
+    // 23.2.3.7 Set.prototype.has(value)
+    has: function(key){
+      return fastKey(key) in this[DATA];
     }
@@ -138,16 +160,10 @@ }
     get: function(key){
-      return this[VALUES][fastKey(key)];
+      var entry = this[DATA][fastKey(key)];
+      return entry && entry.v;
     },
     // 23.1.3.9 Map.prototype.set(key, value)
     set: function(key, value){
-      var index  = fastKey(key, true)
-        , values = this[VALUES];
-      if(!(index in values)){
-        this[KEYS][index] = same(key, -0) ? 0 : key;
-        this[SIZE]++;
-      }
-      values[index] = value;
-      return this;
+      return def(this, same(key, -0) ? 0 : key, value);
     }
-  }, collectionMethods(VALUES), true);
+  }, collectionMethods, true);
   
@@ -158,11 +174,6 @@ // 23.2 Set Objects
     add: function(value){
-      var index  = fastKey(value, true)
-        , values = this[KEYS];
-      if(!(index in values)){
-        values[index] = same(value, -0) ? 0 : value;
-        this[SIZE]++;
-      }
-      return this;
+      value = same(value, -0) ? 0 : value;
+      return def(this, value, value);
     }
-  }, collectionMethods(KEYS));
+  }, collectionMethods);
   
@@ -208,2 +219,33 @@ function getWeakData(it){
   }, weakCollectionMethods, false, true);
+  
+  function defineCollectionIterators(C, NAME, DEFAULT){
+    // 23.2.5.1 CreateSetIterator Abstract Operation
+    // 23.1.5.1 CreateMapIterator Abstract Operation
+    defineStdIterators(C, NAME, function(iterated, kind){
+      set(this, ITER, {o: iterated, k: kind});
+    // 23.1.5.2.1 %MapIteratorPrototype%.next()
+    // 23.2.5.2.1 %SetIteratorPrototype%.next()
+    }, function(){
+      var iter = this[ITER]
+        , O    = iter.o
+        , last = iter.l
+        , entry;
+      while(iter.l && iter.l.r)iter.l = iter.l.p;
+      if(!O || !(iter.l = entry = iter.l ? iter.l.n : O[FIRST]))return (iter.o = undefined), iterResult(1);
+      switch(iter.k){
+        case KEY:   return iterResult(0, entry.k);
+        case VALUE: return iterResult(0, entry.v);
+      }             return iterResult(0, [entry.k, entry.v]);
+    }, DEFAULT);
+  }
+  // 23.1.3.4 Map.prototype.entries()
+  // 23.1.3.8 Map.prototype.keys()
+  // 23.1.3.11 Map.prototype.values()
+  // 23.1.3.12 Map.prototype[@@iterator]()
+  defineCollectionIterators(Map, MAP, KEY+VALUE);
+  // 23.2.3.5 Set.prototype.entries()
+  // 23.2.3.8 Set.prototype.keys()
+  // 23.2.3.10 Set.prototype.values()
+  // 23.2.3.11 Set.prototype[@@iterator]()
+  defineCollectionIterators(Set, SET, VALUE);
 }();

src/es6.js

@@ -39,3 +39,4 @@ // ECMAScript 6 shim
     , sqrt = Math.sqrt
-    , fcc  = String.fromCharCode;
+    , fcc  = String.fromCharCode
+    , at   = createPointAt(true);
   // 20.2.2.5 Math.asinh(x)
@@ -215,2 +216,17 @@ function asinh(x){
   });
+  // 21.1.3.27 String.prototype[@@iterator]()
+  // 21.1.5.1 CreateStringIterator Abstract Operation
+  defineStdIterators(String, STRING, function(iterated){
+    set(this, ITER, {o: String(iterated), i: 0});
+  // 21.1.5.2.1 %StringIteratorPrototype%.next()
+  }, function(){
+    var iter  = this[ITER]
+      , O     = iter.o
+      , index = iter.i
+      , point;
+    if(index >= O.length)return iterResult(1);
+    point = at.call(O, index);
+    iter.i += point.length;
+    return iterResult(0, point);
+  });
   
@@ -280,3 +296,24 @@ $define(STATIC, ARRAY, {
   });
+  // 22.1.3.4 Array.prototype.entries()
+  // 22.1.3.13 Array.prototype.keys()
+  // 22.1.3.29 Array.prototype.values()
+  // 22.1.3.30 Array.prototype[@@iterator]()
+  // 22.1.5.1 CreateArrayIterator Abstract Operation
+  defineStdIterators(Array, ARRAY, function(iterated, kind){
+    set(this, ITER, {o: ES5Object(iterated), i: 0, k: kind});
+  // 22.1.5.2.1 %ArrayIteratorPrototype%.next()
+  }, function(){
+    var iter  = this[ITER]
+      , O     = iter.o
+      , index = iter.i++;
+    if(!O || index >= O.length)return (iter.o = undefined), iterResult(1);
+    switch(iter.k){
+      case KEY:   return iterResult(0, index);
+      case VALUE: return iterResult(0, O[index]);
+    }             return iterResult(0, [index, O[index]]);
+  }, VALUE);
   
+  // argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7)
+  Iterators[ARGUMENTS] = Iterators[ARRAY];
+  
   // 24.3.3 JSON[@@toStringTag]
@@ -283,0 +320,0 @@ setToStringTag(global.JSON, 'JSON', true);

src/es7.js

@@ -10,2 +10,16 @@ !function(){
   });
+  
+  function createObjectToArray(isEntries){
+    return function(object){
+      var O      = ES5Object(object)
+        , keys   = getKeys(object)
+        , length = keys.length
+        , i      = 0
+        , result = Array(length)
+        , key;
+      if(isEntries)while(length > i)result[i] = [key = keys[i++], O[key]];
+      else while(length > i)result[i] = O[keys[i++]];
+      return result;
+    }
+  }
   $define(STATIC, OBJECT, {
@@ -12,0 +26,0 @@ // https://github.com/rwaldron/tc39-notes/blob/master/es6/2014-04/apr-9.md#51-objectentries-objectvalues

No alert changes

Improved metrics

Total package byte prevSize

1047103

increased by4.8%

Lines of code

20835

increased by6.76%

Number of lines in readme file

1256

increased by0.64%

Worsened metrics

Number of package files

69

decreased by-1.43%

No dependency changes