33 lines
943 B
JavaScript
33 lines
943 B
JavaScript
var keys = require('../object/keys');
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/**
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* A specialized version of `_.assign` for customizing assigned values without
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* support for argument juggling, multiple sources, and `this` binding `customizer`
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* functions.
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*
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* @private
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* @param {Object} object The destination object.
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* @param {Object} source The source object.
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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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*/
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function assignWith(object, source, customizer) {
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var index = -1,
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props = keys(source),
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length = props.length;
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while (++index < length) {
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var key = props[index],
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value = object[key],
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result = customizer(value, source[key], key, object, source);
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if ((result === result ? (result !== value) : (value === value)) ||
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(value === undefined && !(key in object))) {
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object[key] = result;
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}
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}
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return object;
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}
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module.exports = assignWith;
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