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38 lines
1.2 KiB
JavaScript
38 lines
1.2 KiB
JavaScript
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var copyObject = require('./_copyObject'),
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createAssigner = require('./_createAssigner'),
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keys = require('./keys');
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/**
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* This method is like `_.assign` except that it accepts `customizer`
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* which is invoked to produce the assigned values. If `customizer` returns
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* `undefined`, assignment is handled by the method instead. The `customizer`
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* is invoked with five arguments: (objValue, srcValue, key, object, source).
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*
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* **Note:** This method mutates `object`.
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Object
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* @param {Object} object The destination object.
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* @param {...Object} sources The source objects.
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* @param {Function} [customizer] The function to customize assigned values.
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* @returns {Object} Returns `object`.
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* @see _.assignInWith
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* @example
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*
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* function customizer(objValue, srcValue) {
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* return _.isUndefined(objValue) ? srcValue : objValue;
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* }
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*
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* var defaults = _.partialRight(_.assignWith, customizer);
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*
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* defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
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* // => { 'a': 1, 'b': 2 }
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*/
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var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
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copyObject(source, keys(source), object, customizer);
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});
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module.exports = assignWith;
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