65 lines
1.8 KiB
JavaScript
65 lines
1.8 KiB
JavaScript
var assignValue = require('./_assignValue'),
|
|
copyObject = require('./_copyObject'),
|
|
createAssigner = require('./_createAssigner'),
|
|
isArrayLike = require('./isArrayLike'),
|
|
isPrototype = require('./_isPrototype'),
|
|
keys = require('./keys');
|
|
|
|
/** Used for built-in method references. */
|
|
var objectProto = Object.prototype;
|
|
|
|
/** Used to check objects for own properties. */
|
|
var hasOwnProperty = objectProto.hasOwnProperty;
|
|
|
|
/** Built-in value references. */
|
|
var propertyIsEnumerable = objectProto.propertyIsEnumerable;
|
|
|
|
/** Detect if properties shadowing those on `Object.prototype` are non-enumerable. */
|
|
var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
|
|
|
|
/**
|
|
* Assigns own enumerable string keyed properties of source objects to the
|
|
* destination object. Source objects are applied from left to right.
|
|
* Subsequent sources overwrite property assignments of previous sources.
|
|
*
|
|
* **Note:** This method mutates `object` and is loosely based on
|
|
* [`Object.assign`](https://mdn.io/Object/assign).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.10.0
|
|
* @category Object
|
|
* @param {Object} object The destination object.
|
|
* @param {...Object} [sources] The source objects.
|
|
* @returns {Object} Returns `object`.
|
|
* @see _.assignIn
|
|
* @example
|
|
*
|
|
* function Foo() {
|
|
* this.a = 1;
|
|
* }
|
|
*
|
|
* function Bar() {
|
|
* this.c = 3;
|
|
* }
|
|
*
|
|
* Foo.prototype.b = 2;
|
|
* Bar.prototype.d = 4;
|
|
*
|
|
* _.assign({ 'a': 0 }, new Foo, new Bar);
|
|
* // => { 'a': 1, 'c': 3 }
|
|
*/
|
|
var assign = createAssigner(function(object, source) {
|
|
if (nonEnumShadows || isPrototype(source) || isArrayLike(source)) {
|
|
copyObject(source, keys(source), object);
|
|
return;
|
|
}
|
|
for (var key in source) {
|
|
if (hasOwnProperty.call(source, key)) {
|
|
assignValue(object, key, source[key]);
|
|
}
|
|
}
|
|
});
|
|
|
|
module.exports = assign;
|