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Remove _.isPlainObject fallback.

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jdalton
2015-05-26 11:17:36 -07:00
parent c0e8cc0254
commit 255da0a0d7
1 changed files with 24 additions and 47 deletions
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71
lodash.src.js
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@@ -765,7 +765,6 @@
ceil = Math.ceil,
clearTimeout = context.clearTimeout,
floor = Math.floor,
getPrototypeOf = getNative(Object, 'getPrototypeOf'),
parseFloat = context.parseFloat,
push = arrayProto.push,
propertyIsEnumerable = objectProto.propertyIsEnumerable,
@@ -4470,44 +4469,6 @@
};
}());
/**
* A fallback implementation of `_.isPlainObject` which checks if `value`
* is an object created by the `Object` constructor or has a `[[Prototype]]`
* of `null`.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
*/
function shimIsPlainObject(value) {
var Ctor,
support = lodash.support;
// Exit early for non `Object` objects.
if (!(isObjectLike(value) && objToString.call(value) == objectTag && !isHostObject(value) && !isArguments(value)) ||
(!hasOwnProperty.call(value, 'constructor') && (Ctor = value.constructor, typeof Ctor == 'function' && !(Ctor instanceof Ctor)))) {
return false;
}
// IE < 9 iterates inherited properties before own properties. If the first
// iterated property is an object's own property then there are no inherited
// enumerable properties.
var result;
if (support.ownLast) {
baseForIn(value, function(subValue, key, object) {
result = hasOwnProperty.call(object, key);
return false;
});
return result !== false;
}
// In most environments an object's own properties are iterated before
// its inherited properties. If the last iterated property is an object's
// own property then there are no inherited enumerable properties.
baseForIn(value, function(subValue, key) {
result = key;
});
return result === undefined || hasOwnProperty.call(value, result);
}
/**
* A fallback implementation of `Object.keys` which creates an array of the
* own enumerable property names of `object`.
@@ -9021,16 +8982,32 @@
* _.isPlainObject(Object.create(null));
* // => true
*/
var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
if (!(value && objToString.call(value) == objectTag && !isArguments(value))) {
function isPlainObject(value) {
var Ctor;
// Exit early for non `Object` objects.
if (!(isObjectLike(value) && objToString.call(value) == objectTag && !isHostObject(value) && !isArguments(value)) ||
(!hasOwnProperty.call(value, 'constructor') && (Ctor = value.constructor, typeof Ctor == 'function' && !(Ctor instanceof Ctor)))) {
return false;
}
var valueOf = getNative(value, 'valueOf'),
objProto = valueOf && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);
return objProto
? (value == objProto || getPrototypeOf(value) == objProto)
: shimIsPlainObject(value);
// IE < 9 iterates inherited properties before own properties. If the first
// iterated property is an object's own property then there are no inherited
// enumerable properties.
var result;
if (lodash.support.ownLast) {
baseForIn(value, function(subValue, key, object) {
result = hasOwnProperty.call(object, key);
return false;
});
return result !== false;
}
// In most environments an object's own properties are iterated before
// its inherited properties. If the last iterated property is an object's
// own property then there are no inherited enumerable properties.
baseForIn(value, function(subValue, key) {
result = key;
});
return result === undefined || hasOwnProperty.call(value, result);
};
/**