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40 lines
1.2 KiB
40 lines
1.2 KiB
3 years ago
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var baseMerge = require('./_baseMerge'),
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createAssigner = require('./_createAssigner');
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/**
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* This method is like `_.merge` except that it accepts `customizer` which
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* is invoked to produce the merged values of the destination and source
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* properties. If `customizer` returns `undefined`, merging is handled by the
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* method instead. The `customizer` is invoked with six arguments:
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* (objValue, srcValue, key, object, source, stack).
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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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* @example
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*
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* function customizer(objValue, srcValue) {
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* if (_.isArray(objValue)) {
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* return objValue.concat(srcValue);
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* }
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* }
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*
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* var object = { 'a': [1], 'b': [2] };
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* var other = { 'a': [3], 'b': [4] };
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*
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* _.mergeWith(object, other, customizer);
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* // => { 'a': [1, 3], 'b': [2, 4] }
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*/
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var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
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baseMerge(object, source, srcIndex, customizer);
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});
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module.exports = mergeWith;
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