core-js - npm Package Compare versions

Comparing version 0.2.3 to 0.2.4

bower.json

 {
   "name": "core.js",
   "main": "client/core.js",
-  "version": "0.2.3",
+  "version": "0.2.4",
   "description": "Standard Library",
@@ -6,0 +6,0 @@ "keywords": [

client/core.min.js

 /**
- * Core.js 0.2.3
+ * Core.js 0.2.4
  * https://github.com/zloirock/core-js
@@ -7,3 +7,3 @@ * License: http://rock.mit-license.org
  */
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client/shim.js

 /**
- * Core.js 0.2.3
+ * Core.js 0.2.4
  * https://github.com/zloirock/core-js
@@ -68,4 +68,2 @@ * License: http://rock.mit-license.org
   , Infinity        = 1 / 0
-  , core            = {}
-  , path            = framework ? global : core
   , DOT             = '.';
@@ -106,4 +104,2 @@
   , REFERENCE_GET;
-// Placeholder
-core._ = path._ = framework ? path._ || {} : {};
 // Partial apply
@@ -188,3 +184,3 @@ function part(/* ...args */){
 var assign = Object.assign || function(target, source){
-  var T = Object(target)
+  var T = Object(assertDefined(target))
     , l = arguments.length
@@ -252,5 +248,5 @@ , i = 1;
   return function(callbackfn, that /* = undefined */){
-    var f      = ctx(callbackfn, that, 3)
-      , O      = Object(this)
+    var O      = Object(assertDefined(this))
       , self   = ES5Object(O)
+      , f      = ctx(callbackfn, that, 3)
       , length = toLength(self.length)
@@ -278,3 +274,3 @@ , index  = 0
   return function(el, fromIndex /* = 0 */){
-    var O      = ES5Object(this)
+    var O      = ES5Object(assertDefined(this))
       , length = toLength(O.length)
@@ -348,3 +344,3 @@ , index  = toIndex(fromIndex, length);
   return function(pos){
-    var s = String(this)
+    var s = String(assertDefined(this))
       , i = toInteger(pos)
@@ -366,2 +362,6 @@ , l = s.length
 }
+function assertDefined(it){
+  if(it == undefined)throw TypeError('Function called on null or undefined');
+  return it;
+}
 function assertFunction(it){
@@ -482,4 +482,6 @@ assert(isFunction(it), it, ' is not a function!');
 // core
-var NODE   = cof(process) == PROCESS
-  , old    = global.core
+var NODE = cof(process) == PROCESS
+  , core = {}
+  , path = framework ? global : core
+  , old  = global.core
   // type bitmap
@@ -492,2 +494,6 @@ , FORCED = 1
   , WRAP   = 32;
+function assignHidden(target, src){
+  for(var key in src)hidden(target, key, src[key]);
+  return target;
+}
 function $define(type, name, source){
@@ -516,3 +522,3 @@ var key, own, out, exp
     // export
-    if(exports[key] != out)exports[key] = exp;
+    if(exports[key] != out)hidden(exports, key, exp);
     // extend global
@@ -845,3 +851,3 @@ framework && target && !own && (isGlobal || delete target[key]) && hidden(target, key, out);
   var isInteger = Number.isInteger || function(it){
-        return isFinite(it) && floor(it) === it;
+        return !isObject(it) && isFinite(it) && floor(it) === it;
       }
@@ -890,3 +896,3 @@ // 20.2.2.28 Math.sign(x)
     acosh: function(x){
-      return log(x + sqrt(x * x - 1));
+      return x < 1 ? NaN : log(x + sqrt(x * x - 1));
     },
@@ -916,4 +922,8 @@ // 20.2.2.5 Math.asinh(x)
     // 20.2.2.16 Math.fround(x)
-    // TODO
+    // TODO: fallback for IE9-
+    fround: function(x){
+      return new Float32Array([x])[0];
+    },
     // 20.2.2.17 Math.hypot([value1[, value2[, … ]]])
+    // TODO: work for very large & small numbers
     hypot: function(value1, value2){
@@ -965,2 +975,5 @@ var sum    = 0
   
+  function assertNotRegExp(it){
+    if(isObject(it) && it instanceof RegExp)throw TypeError();
+  }
   $define(STATIC, STRING, {
@@ -984,3 +997,3 @@ // 21.1.2.2 String.fromCodePoint(...codePoints)
     raw: function(callSite){
-      var raw = ES5Object(callSite.raw)
+      var raw = ES5Object(assertDefined(callSite.raw))
         , len = toLength(raw.length)
@@ -1001,2 +1014,3 @@ , sln = arguments.length
     endsWith: function(searchString, endPosition /* = @length */){
+      assertNotRegExp(searchString);
       var len = this.length
@@ -1009,10 +1023,10 @@ , end = endPosition === undefined ? len : min(toLength(endPosition), len);
     includes: function(searchString, position /* = 0 */){
-      return !!~String(this).indexOf(searchString, position);
+      return !!~String(assertDefined(this)).indexOf(searchString, position);
     },
     // 21.1.3.13 String.prototype.repeat(count)
     repeat: function(count){
-      var str = String(this)
+      var str = String(assertDefined(this))
         , res = ''
         , n   = toInteger(count);
-      if(0 > n)throw RangeError("Count can't be negative");
+      if(0 > n || n == Infinity)throw RangeError("Count can't be negative");
       for(;n > 0; (n >>>= 1) && (str += str))if(n & 1)res += str;
@@ -1023,2 +1037,3 @@ return res;
     startsWith: function(searchString, position /* = 0 */){
+      assertNotRegExp(searchString);
       var index = toLength(min(position, this.length));
@@ -1033,3 +1048,3 @@ searchString += '';
     from: function(arrayLike, mapfn /* -> it */, that /* = undefind */){
-      var O       = Object(arrayLike)
+      var O       = Object(assertDefined(arrayLike))
         , result  = new (generic(this, Array))
@@ -1061,3 +1076,3 @@ , mapping = mapfn !== undefined
     copyWithin: function(target /* = 0 */, start /* = 0 */, end /* = @length */){
-      var O     = Object(this)
+      var O     = Object(assertDefined(this))
         , len   = toLength(O.length)
@@ -1067,3 +1082,4 @@ , to    = toIndex(target, len)
         , fin   = end === undefined ? len : toIndex(end, len)
-        , count = min(fin - from, len - to), inc = 1;
+        , count = min(fin - from, len - to)
+        , inc   = 1;
       if(from < to && to < from + count){
@@ -1083,3 +1099,3 @@ inc  = -1;
     fill: function(value, start /* = 0 */, end /* = @length */){
-      var O      = Object(this)
+      var O      = Object(assertDefined(this))
         , length = toLength(O.length)
@@ -1344,2 +1360,8 @@ , index  = toIndex(start, length)
   
+  function wrapSVZ(method, chain){
+    return 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){
@@ -1361,11 +1383,12 @@ var ADDER_KEY = isMap ? 'set' : 'add'
       set(C, SHIM, true);
-      assign(C[PROTOTYPE], methods, commonMethods);
+      assignHidden(assignHidden(C[PROTOTYPE], methods), commonMethods);
       isWeak || defineProperty(C[PROTOTYPE], 'size', {get: function(){
-        return this[SIZE];
+        return assertDefined(this[SIZE]);
       }});
     } else {
-      var Native     = C
-        , collection = new C
-        , adder      = collection[ADDER_KEY]
-        , buggyChaining, buggyZero;
+      var Native = C
+        , proto  = C[PROTOTYPE]
+        , inst   = new C
+        , chain  = inst[ADDER_KEY](isWeak ? {} : -0, 1)
+        , buggyZero;
       // wrap to init collections from iterable
@@ -1377,14 +1400,16 @@ if(!(SYMBOL_ITERATOR in ArrayProto && C.length)){
         }
-        C[PROTOTYPE] = Native[PROTOTYPE];
+        C[PROTOTYPE] = proto;
       }
-      buggyChaining = collection[ADDER_KEY](isWeak ? {} : -0, 1) !== collection;
-      isWeak || collection[FOR_EACH](function(val, key){
+      isWeak || inst[FOR_EACH](function(val, key){
         if(same(key, -0))buggyZero = true;
       });
-      // fix .add & .set for chaining & converting -0 key to +0
-      if(framework && (buggyChaining || buggyZero)){
-        hidden(C[PROTOTYPE], ADDER_KEY, function(a, b){
-          adder.call(this, same(a, -0) ? 0 : a, b);
-          return this;
-        });
+      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));
       }
@@ -1446,3 +1471,3 @@ }
           }
-        } while(index != undefined && index != (k = getKeys(keys))[k.length - 1]);
+        } while((k = getKeys(keys)).length && k[k.length - 1] != index);
       },
@@ -1776,4 +1801,4 @@ // 23.1.3.7 Map.prototype.has(key)
   } catch(e){}
-  $define(GLOBAL + FORCED, {console: assign($console.log, $console)});
+  $define(GLOBAL + FORCED, {console: assignHidden($console.log, $console)});
 }(global.console || {});
 }(Function('return this'), true);

client/shim.min.js

 /**
- * Core.js 0.2.3
+ * Core.js 0.2.4
  * 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": "0.2.3",
+  "version": "0.2.4",
   "repository": {
@@ -6,0 +6,0 @@ "type": "git",

README.md

@@ -196,2 +196,3 @@ # Core.js
   .expm1(num) -> num
+  .fround(num) -> num (IE10+)
   .hypot(...args) -> num
@@ -264,20 +265,15 @@ .imul(num, num) -> int
 ```
-By default, `Symbol` polyfill define setter in `Object.prototype`. You can disable it. [Example](http://goo.gl/gbgULA):
+By default, `Symbol` polyfill define setter in `Object.prototype`. You can disable it. [Example](http://goo.gl/N5UD7J):
 ```javascript
+Symbol.useSimple();
 var s1 = Symbol('s1')
   , o1 = {};
 o1[s1] = true;
-for(var key in o1)log(key); // nothing
+for(var key in o1)log(key); // => 'Symbol(s1)_t.qamkg9f3q', w/o native Symbol
 
-Symbol.simple();
+Symbol.useSetter();
 var s2 = Symbol('s2')
   , o2 = {};
 o2[s2] = true;
-for(var key in o2)log(key); // => 'Symbol(s2)_t.qamkg9f3q', w/o native Symbol
-
-Symbol.setter();
-var s3 = Symbol('s3')
-  , o3 = {};
-o3[s3] = true;
-for(var key in o3)log(key); // nothing
+for(var key in o2)log(key); // nothing
 ```
@@ -1194,2 +1190,6 @@ ### ECMAScript 6: Collections
 ## Changelog
+**0.2.4** - *2014.12.17* - Better compliance of ES6
+  * some fixes
+  * added [`Math.fround`](#ecmascript-6-number--math) (IE10+)
+
 **0.2.3** - *2014.12.15* - [Symbols](#ecmascript-6-symbols):
@@ -1196,0 +1196,0 @@ * added option to disable addition setter to `Object.prototype` for Symbol polyfill:

shim.js

 /**
- * Core.js 0.2.3
+ * Core.js 0.2.4
  * https://github.com/zloirock/core-js
@@ -68,4 +68,2 @@ * License: http://rock.mit-license.org
   , Infinity        = 1 / 0
-  , core            = {}
-  , path            = framework ? global : core
   , DOT             = '.';
@@ -106,4 +104,2 @@
   , REFERENCE_GET;
-// Placeholder
-core._ = path._ = framework ? path._ || {} : {};
 // Partial apply
@@ -188,3 +184,3 @@ function part(/* ...args */){
 var assign = Object.assign || function(target, source){
-  var T = Object(target)
+  var T = Object(assertDefined(target))
     , l = arguments.length
@@ -252,5 +248,5 @@ , i = 1;
   return function(callbackfn, that /* = undefined */){
-    var f      = ctx(callbackfn, that, 3)
-      , O      = Object(this)
+    var O      = Object(assertDefined(this))
       , self   = ES5Object(O)
+      , f      = ctx(callbackfn, that, 3)
       , length = toLength(self.length)
@@ -278,3 +274,3 @@ , index  = 0
   return function(el, fromIndex /* = 0 */){
-    var O      = ES5Object(this)
+    var O      = ES5Object(assertDefined(this))
       , length = toLength(O.length)
@@ -348,3 +344,3 @@ , index  = toIndex(fromIndex, length);
   return function(pos){
-    var s = String(this)
+    var s = String(assertDefined(this))
       , i = toInteger(pos)
@@ -366,2 +362,6 @@ , l = s.length
 }
+function assertDefined(it){
+  if(it == undefined)throw TypeError('Function called on null or undefined');
+  return it;
+}
 function assertFunction(it){
@@ -482,4 +482,6 @@ assert(isFunction(it), it, ' is not a function!');
 // core
-var NODE   = cof(process) == PROCESS
-  , old    = global.core
+var NODE = cof(process) == PROCESS
+  , core = {}
+  , path = framework ? global : core
+  , old  = global.core
   // type bitmap
@@ -492,2 +494,6 @@ , FORCED = 1
   , WRAP   = 32;
+function assignHidden(target, src){
+  for(var key in src)hidden(target, key, src[key]);
+  return target;
+}
 function $define(type, name, source){
@@ -516,3 +522,3 @@ var key, own, out, exp
     // export
-    if(exports[key] != out)exports[key] = exp;
+    if(exports[key] != out)hidden(exports, key, exp);
     // extend global
@@ -638,3 +644,3 @@ framework && target && !own && (isGlobal || delete target[key]) && hidden(target, key, out);
   var isInteger = Number.isInteger || function(it){
-        return isFinite(it) && floor(it) === it;
+        return !isObject(it) && isFinite(it) && floor(it) === it;
       }
@@ -683,3 +689,3 @@ // 20.2.2.28 Math.sign(x)
     acosh: function(x){
-      return log(x + sqrt(x * x - 1));
+      return x < 1 ? NaN : log(x + sqrt(x * x - 1));
     },
@@ -709,4 +715,8 @@ // 20.2.2.5 Math.asinh(x)
     // 20.2.2.16 Math.fround(x)
-    // TODO
+    // TODO: fallback for IE9-
+    fround: function(x){
+      return new Float32Array([x])[0];
+    },
     // 20.2.2.17 Math.hypot([value1[, value2[, … ]]])
+    // TODO: work for very large & small numbers
     hypot: function(value1, value2){
@@ -758,2 +768,5 @@ var sum    = 0
   
+  function assertNotRegExp(it){
+    if(isObject(it) && it instanceof RegExp)throw TypeError();
+  }
   $define(STATIC, STRING, {
@@ -777,3 +790,3 @@ // 21.1.2.2 String.fromCodePoint(...codePoints)
     raw: function(callSite){
-      var raw = ES5Object(callSite.raw)
+      var raw = ES5Object(assertDefined(callSite.raw))
         , len = toLength(raw.length)
@@ -794,2 +807,3 @@ , sln = arguments.length
     endsWith: function(searchString, endPosition /* = @length */){
+      assertNotRegExp(searchString);
       var len = this.length
@@ -802,10 +816,10 @@ , end = endPosition === undefined ? len : min(toLength(endPosition), len);
     includes: function(searchString, position /* = 0 */){
-      return !!~String(this).indexOf(searchString, position);
+      return !!~String(assertDefined(this)).indexOf(searchString, position);
     },
     // 21.1.3.13 String.prototype.repeat(count)
     repeat: function(count){
-      var str = String(this)
+      var str = String(assertDefined(this))
         , res = ''
         , n   = toInteger(count);
-      if(0 > n)throw RangeError("Count can't be negative");
+      if(0 > n || n == Infinity)throw RangeError("Count can't be negative");
       for(;n > 0; (n >>>= 1) && (str += str))if(n & 1)res += str;
@@ -816,2 +830,3 @@ return res;
     startsWith: function(searchString, position /* = 0 */){
+      assertNotRegExp(searchString);
       var index = toLength(min(position, this.length));
@@ -826,3 +841,3 @@ searchString += '';
     from: function(arrayLike, mapfn /* -> it */, that /* = undefind */){
-      var O       = Object(arrayLike)
+      var O       = Object(assertDefined(arrayLike))
         , result  = new (generic(this, Array))
@@ -854,3 +869,3 @@ , mapping = mapfn !== undefined
     copyWithin: function(target /* = 0 */, start /* = 0 */, end /* = @length */){
-      var O     = Object(this)
+      var O     = Object(assertDefined(this))
         , len   = toLength(O.length)
@@ -860,3 +875,4 @@ , to    = toIndex(target, len)
         , fin   = end === undefined ? len : toIndex(end, len)
-        , count = min(fin - from, len - to), inc = 1;
+        , count = min(fin - from, len - to)
+        , inc   = 1;
       if(from < to && to < from + count){
@@ -876,3 +892,3 @@ inc  = -1;
     fill: function(value, start /* = 0 */, end /* = @length */){
-      var O      = Object(this)
+      var O      = Object(assertDefined(this))
         , length = toLength(O.length)
@@ -1137,2 +1153,8 @@ , index  = toIndex(start, length)
   
+  function wrapSVZ(method, chain){
+    return 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){
@@ -1154,11 +1176,12 @@ var ADDER_KEY = isMap ? 'set' : 'add'
       set(C, SHIM, true);
-      assign(C[PROTOTYPE], methods, commonMethods);
+      assignHidden(assignHidden(C[PROTOTYPE], methods), commonMethods);
       isWeak || defineProperty(C[PROTOTYPE], 'size', {get: function(){
-        return this[SIZE];
+        return assertDefined(this[SIZE]);
       }});
     } else {
-      var Native     = C
-        , collection = new C
-        , adder      = collection[ADDER_KEY]
-        , buggyChaining, buggyZero;
+      var Native = C
+        , proto  = C[PROTOTYPE]
+        , inst   = new C
+        , chain  = inst[ADDER_KEY](isWeak ? {} : -0, 1)
+        , buggyZero;
       // wrap to init collections from iterable
@@ -1170,14 +1193,16 @@ if(!(SYMBOL_ITERATOR in ArrayProto && C.length)){
         }
-        C[PROTOTYPE] = Native[PROTOTYPE];
+        C[PROTOTYPE] = proto;
       }
-      buggyChaining = collection[ADDER_KEY](isWeak ? {} : -0, 1) !== collection;
-      isWeak || collection[FOR_EACH](function(val, key){
+      isWeak || inst[FOR_EACH](function(val, key){
         if(same(key, -0))buggyZero = true;
       });
-      // fix .add & .set for chaining & converting -0 key to +0
-      if(framework && (buggyChaining || buggyZero)){
-        hidden(C[PROTOTYPE], ADDER_KEY, function(a, b){
-          adder.call(this, same(a, -0) ? 0 : a, b);
-          return this;
-        });
+      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));
       }
@@ -1239,3 +1264,3 @@ }
           }
-        } while(index != undefined && index != (k = getKeys(keys))[k.length - 1]);
+        } while((k = getKeys(keys)).length && k[k.length - 1] != index);
       },
@@ -1551,4 +1576,4 @@ // 23.1.3.7 Map.prototype.has(key)
   } catch(e){}
-  $define(GLOBAL + FORCED, {console: assign($console.log, $console)});
+  $define(GLOBAL + FORCED, {console: assignHidden($console.log, $console)});
 }(global.console || {});
 }(Function('return this'), true);

src/$for.js

@@ -39,3 +39,3 @@ !function(ENTRIES, FN){
   
-  assign($forProto, {
+  assignHidden($forProto, {
     of: function(fn, that){
@@ -42,0 +42,0 @@ forOf(this, this[ENTRIES], fn, that);

src/binding.js

 !function(_, toLocaleString){
+  // Placeholder
+  core._ = path._ = path._ || {};
+
   $define(PROTO + FORCED, FUNCTION, {
@@ -3,0 +6,0 @@ part: part,

src/common.js

@@ -55,4 +55,2 @@ var global          = returnThis()
   , Infinity        = 1 / 0
-  , core            = {}
-  , path            = framework ? global : core
   , DOT             = '.';
@@ -93,4 +91,2 @@
   , REFERENCE_GET;
-// Placeholder
-core._ = path._ = framework ? path._ || {} : {};
 // Partial apply
@@ -175,3 +171,3 @@ function part(/* ...args */){
 var assign = Object.assign || function(target, source){
-  var T = Object(target)
+  var T = Object(assertDefined(target))
     , l = arguments.length
@@ -239,5 +235,5 @@ , i = 1;
   return function(callbackfn, that /* = undefined */){
-    var f      = ctx(callbackfn, that, 3)
-      , O      = Object(this)
+    var O      = Object(assertDefined(this))
       , self   = ES5Object(O)
+      , f      = ctx(callbackfn, that, 3)
       , length = toLength(self.length)
@@ -265,3 +261,3 @@ , index  = 0
   return function(el, fromIndex /* = 0 */){
-    var O      = ES5Object(this)
+    var O      = ES5Object(assertDefined(this))
       , length = toLength(O.length)
@@ -335,3 +331,3 @@ , index  = toIndex(fromIndex, length);
   return function(pos){
-    var s = String(this)
+    var s = String(assertDefined(this))
       , i = toInteger(pos)
@@ -353,2 +349,6 @@ , l = s.length
 }
+function assertDefined(it){
+  if(it == undefined)throw TypeError('Function called on null or undefined');
+  return it;
+}
 function assertFunction(it){
@@ -469,4 +469,6 @@ assert(isFunction(it), it, ' is not a function!');
 // core
-var NODE   = cof(process) == PROCESS
-  , old    = global.core
+var NODE = cof(process) == PROCESS
+  , core = {}
+  , path = framework ? global : core
+  , old  = global.core
   // type bitmap
@@ -479,2 +481,6 @@ , FORCED = 1
   , WRAP   = 32;
+function assignHidden(target, src){
+  for(var key in src)hidden(target, key, src[key]);
+  return target;
+}
 function $define(type, name, source){
@@ -503,3 +509,3 @@ var key, own, out, exp
     // export
-    if(exports[key] != out)exports[key] = exp;
+    if(exports[key] != out)hidden(exports, key, exp);
     // extend global
@@ -506,0 +512,0 @@ framework && target && !own && (isGlobal || delete target[key]) && hidden(target, key, out);

src/console.js

@@ -29,3 +29,3 @@ !function(console){
   } catch(e){}
-  $define(GLOBAL + FORCED, {console: assign($console.log, $console)});
+  $define(GLOBAL + FORCED, {console: assignHidden($console.log, $console)});
 }(global.console || {});

src/dict.js

@@ -141,3 +141,3 @@ !function(DICT){
   
-  $define(GLOBAL + FORCED, {Dict: assign(Dict, dictMethods)});
+  $define(GLOBAL + FORCED, {Dict: assignHidden(Dict, dictMethods)});
 }('Dict');

src/es6_collections.js

@@ -12,2 +12,8 @@ // ECMAScript 6 collections shim
   
+  function wrapSVZ(method, chain){
+    return 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){
@@ -29,11 +35,12 @@ var ADDER_KEY = isMap ? 'set' : 'add'
       set(C, SHIM, true);
-      assign(C[PROTOTYPE], methods, commonMethods);
+      assignHidden(assignHidden(C[PROTOTYPE], methods), commonMethods);
       isWeak || defineProperty(C[PROTOTYPE], 'size', {get: function(){
-        return this[SIZE];
+        return assertDefined(this[SIZE]);
       }});
     } else {
-      var Native     = C
-        , collection = new C
-        , adder      = collection[ADDER_KEY]
-        , buggyChaining, buggyZero;
+      var Native = C
+        , proto  = C[PROTOTYPE]
+        , inst   = new C
+        , chain  = inst[ADDER_KEY](isWeak ? {} : -0, 1)
+        , buggyZero;
       // wrap to init collections from iterable
@@ -45,14 +52,16 @@ if(!(SYMBOL_ITERATOR in ArrayProto && C.length)){
         }
-        C[PROTOTYPE] = Native[PROTOTYPE];
+        C[PROTOTYPE] = proto;
       }
-      buggyChaining = collection[ADDER_KEY](isWeak ? {} : -0, 1) !== collection;
-      isWeak || collection[FOR_EACH](function(val, key){
+      isWeak || inst[FOR_EACH](function(val, key){
         if(same(key, -0))buggyZero = true;
       });
-      // fix .add & .set for chaining & converting -0 key to +0
-      if(framework && (buggyChaining || buggyZero)){
-        hidden(C[PROTOTYPE], ADDER_KEY, function(a, b){
-          adder.call(this, same(a, -0) ? 0 : a, b);
-          return this;
-        });
+      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));
       }
@@ -114,3 +123,3 @@ }
           }
-        } while(index != undefined && index != (k = getKeys(keys))[k.length - 1]);
+        } while((k = getKeys(keys)).length && k[k.length - 1] != index);
       },
@@ -117,0 +126,0 @@ // 23.1.3.7 Map.prototype.has(key)

src/es6.js

@@ -29,3 +29,3 @@ // ECMAScript 6 shim
   var isInteger = Number.isInteger || function(it){
-        return isFinite(it) && floor(it) === it;
+        return !isObject(it) && isFinite(it) && floor(it) === it;
       }
@@ -74,3 +74,3 @@ // 20.2.2.28 Math.sign(x)
     acosh: function(x){
-      return log(x + sqrt(x * x - 1));
+      return x < 1 ? NaN : log(x + sqrt(x * x - 1));
     },
@@ -100,4 +100,8 @@ // 20.2.2.5 Math.asinh(x)
     // 20.2.2.16 Math.fround(x)
-    // TODO
+    // TODO: fallback for IE9-
+    fround: function(x){
+      return new Float32Array([x])[0];
+    },
     // 20.2.2.17 Math.hypot([value1[, value2[, … ]]])
+    // TODO: work for very large & small numbers
     hypot: function(value1, value2){
@@ -149,2 +153,5 @@ var sum    = 0
   
+  function assertNotRegExp(it){
+    if(isObject(it) && it instanceof RegExp)throw TypeError();
+  }
   $define(STATIC, STRING, {
@@ -168,3 +175,3 @@ // 21.1.2.2 String.fromCodePoint(...codePoints)
     raw: function(callSite){
-      var raw = ES5Object(callSite.raw)
+      var raw = ES5Object(assertDefined(callSite.raw))
         , len = toLength(raw.length)
@@ -185,2 +192,3 @@ , sln = arguments.length
     endsWith: function(searchString, endPosition /* = @length */){
+      assertNotRegExp(searchString);
       var len = this.length
@@ -193,10 +201,10 @@ , end = endPosition === undefined ? len : min(toLength(endPosition), len);
     includes: function(searchString, position /* = 0 */){
-      return !!~String(this).indexOf(searchString, position);
+      return !!~String(assertDefined(this)).indexOf(searchString, position);
     },
     // 21.1.3.13 String.prototype.repeat(count)
     repeat: function(count){
-      var str = String(this)
+      var str = String(assertDefined(this))
         , res = ''
         , n   = toInteger(count);
-      if(0 > n)throw RangeError("Count can't be negative");
+      if(0 > n || n == Infinity)throw RangeError("Count can't be negative");
       for(;n > 0; (n >>>= 1) && (str += str))if(n & 1)res += str;
@@ -207,2 +215,3 @@ return res;
     startsWith: function(searchString, position /* = 0 */){
+      assertNotRegExp(searchString);
       var index = toLength(min(position, this.length));
@@ -217,3 +226,3 @@ searchString += '';
     from: function(arrayLike, mapfn /* -> it */, that /* = undefind */){
-      var O       = Object(arrayLike)
+      var O       = Object(assertDefined(arrayLike))
         , result  = new (generic(this, Array))
@@ -245,3 +254,3 @@ , mapping = mapfn !== undefined
     copyWithin: function(target /* = 0 */, start /* = 0 */, end /* = @length */){
-      var O     = Object(this)
+      var O     = Object(assertDefined(this))
         , len   = toLength(O.length)
@@ -251,3 +260,4 @@ , to    = toIndex(target, len)
         , fin   = end === undefined ? len : toIndex(end, len)
-        , count = min(fin - from, len - to), inc = 1;
+        , count = min(fin - from, len - to)
+        , inc   = 1;
       if(from < to && to < from + count){
@@ -267,3 +277,3 @@ inc  = -1;
     fill: function(value, start /* = 0 */, end /* = @length */){
-      var O      = Object(this)
+      var O      = Object(assertDefined(this))
         , length = toLength(O.length)
@@ -270,0 +280,0 @@ , index  = toIndex(start, length)

src/iterator.js

@@ -83,3 +83,3 @@ !function(WRAPPER, ENTRIES, FN, I){
   
-  assign(IteratorPrototype, {
+  assignHidden(IteratorPrototype, {
     to: function(to){
@@ -86,0 +86,0 @@ return to.from(this);

No alert changes

Improved metrics

Total package byte prevSize

999042

increased by2.15%

Lines of code

19531

increased by2.3%

No dependency changes