mirror of https://github.com/jkjoy/sunpeiwen.git
52 lines
1.4 KiB
JavaScript
52 lines
1.4 KiB
JavaScript
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var assignValue = require('./_assignValue'),
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castPath = require('./_castPath'),
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isIndex = require('./_isIndex'),
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isObject = require('./isObject'),
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toKey = require('./_toKey');
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/**
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* The base implementation of `_.set`.
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*
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* @private
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* @param {Object} object The object to modify.
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* @param {Array|string} path The path of the property to set.
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* @param {*} value The value to set.
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* @param {Function} [customizer] The function to customize path creation.
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* @returns {Object} Returns `object`.
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*/
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function baseSet(object, path, value, customizer) {
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if (!isObject(object)) {
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return object;
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}
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path = castPath(path, object);
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var index = -1,
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length = path.length,
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lastIndex = length - 1,
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nested = object;
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while (nested != null && ++index < length) {
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var key = toKey(path[index]),
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newValue = value;
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if (key === '__proto__' || key === 'constructor' || key === 'prototype') {
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return object;
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}
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if (index != lastIndex) {
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var objValue = nested[key];
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newValue = customizer ? customizer(objValue, key, nested) : undefined;
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if (newValue === undefined) {
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newValue = isObject(objValue)
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? objValue
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: (isIndex(path[index + 1]) ? [] : {});
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}
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}
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assignValue(nested, key, newValue);
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nested = nested[key];
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}
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return object;
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}
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module.exports = baseSet;
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