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Remove _.isArguments fallback and _.support.argsTag.

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jdalton
2015-05-26 11:14:25 -07:00
parent 41cec24644
commit c0e8cc0254
1 changed files with 5 additions and 22 deletions
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27
lodash.src.js
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@@ -999,15 +999,6 @@
Ctor.prototype = { 'valueOf': x, 'y': x }; Ctor.prototype = { 'valueOf': x, 'y': x };
for (var key in new Ctor) { props.push(key); } for (var key in new Ctor) { props.push(key); }
/**
* Detect if the `toStringTag` of `arguments` objects is resolvable
* (all but Firefox < 4, IE < 9).
*
* @memberOf _.support
* @type boolean
*/
support.argsTag = objToString.call(arguments) == argsTag;
/** /**
* Detect if `name` or `message` properties of `Error.prototype` are * Detect if `name` or `message` properties of `Error.prototype` are
* enumerable by default (IE < 9, Safari < 5.1). * enumerable by default (IE < 9, Safari < 5.1).
@@ -4493,10 +4484,8 @@
support = lodash.support; support = lodash.support;
// Exit early for non `Object` objects. // Exit early for non `Object` objects.
if (!(isObjectLike(value) && objToString.call(value) == objectTag && !isHostObject(value)) || if (!(isObjectLike(value) && objToString.call(value) == objectTag && !isHostObject(value) && !isArguments(value)) ||
(!hasOwnProperty.call(value, 'constructor') && (!hasOwnProperty.call(value, 'constructor') && (Ctor = value.constructor, typeof Ctor == 'function' && !(Ctor instanceof Ctor)))) {
(Ctor = value.constructor, typeof Ctor == 'function' && !(Ctor instanceof Ctor))) ||
(!support.argsTag && isArguments(value))) {
return false; return false;
} }
// IE < 9 iterates inherited properties before own properties. If the first // IE < 9 iterates inherited properties before own properties. If the first
@@ -8574,14 +8563,8 @@
* // => false * // => false
*/ */
function isArguments(value) { function isArguments(value) {
return isObjectLike(value) && isArrayLike(value) && objToString.call(value) == argsTag; return isObjectLike(value) && isArrayLike(value) &&
} hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee');
// Fallback for environments without a `toStringTag` for `arguments` objects.
if (!support.argsTag) {
isArguments = function(value) {
return isObjectLike(value) && isArrayLike(value) &&
hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee');
};
} }
/** /**
@@ -9039,7 +9022,7 @@
* // => true * // => true
*/ */
var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) { var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
if (!(value && objToString.call(value) == objectTag) || (!lodash.support.argsTag && isArguments(value))) { if (!(value && objToString.call(value) == objectTag && !isArguments(value))) {
return false; return false;
} }
var valueOf = getNative(value, 'valueOf'), var valueOf = getNative(value, 'valueOf'),