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Bump to v4.6.0.
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lodash.updatewith/index.js
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180
lodash.updatewith/index.js
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/**
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* lodash 4.6.0 (Custom Build) <https://lodash.com/>
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* Build: `lodash modularize exports="npm" -o ./`
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* Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var baseSet = require('lodash._baseset'),
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toString = require('lodash.tostring');
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/** Used to match property names within property paths. */
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var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
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reIsPlainProp = /^\w*$/,
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rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]/g;
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/** Used to match backslashes in property paths. */
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var reEscapeChar = /\\(\\)?/g;
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/**
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* Casts `value` to `identity` if it's not a function.
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*
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* @private
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* @param {*} value The value to inspect.
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* @returns {Array} Returns the array-like object.
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*/
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function baseCastFunction(value) {
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return typeof value == 'function' ? value : identity;
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}
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/**
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* Casts `value` to a path array if it's not one.
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*
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* @private
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* @param {*} value The value to inspect.
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* @returns {Array} Returns the cast property path array.
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*/
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function baseCastPath(value) {
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return isArray(value) ? value : stringToPath(value);
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}
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/**
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* The base implementation of `_.get` without support for default values.
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*
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* @private
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* @param {Object} object The object to query.
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* @param {Array|string} path The path of the property to get.
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* @returns {*} Returns the resolved value.
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*/
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function baseGet(object, path) {
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path = isKey(path, object) ? [path + ''] : baseCastPath(path);
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var index = 0,
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length = path.length;
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while (object != null && index < length) {
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object = object[path[index++]];
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}
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return (index && index == length) ? object : undefined;
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}
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/**
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* The base implementation of `_.update`.
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*
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* @private
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* @param {Object} object The object to query.
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* @param {Array|string} path The path of the property to update.
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* @param {Function} updater The function to produce the updated value.
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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 baseUpdate(object, path, updater, customizer) {
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return baseSet(object, path, updater(baseGet(object, path)), customizer);
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}
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/**
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* Checks if `value` is a property name and not a property path.
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*
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* @private
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* @param {*} value The value to check.
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* @param {Object} [object] The object to query keys on.
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* @returns {boolean} Returns `true` if `value` is a property name, else `false`.
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*/
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function isKey(value, object) {
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if (typeof value == 'number') {
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return true;
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}
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return !isArray(value) &&
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(reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
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(object != null && value in Object(object)));
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}
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/**
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* Converts `string` to a property path array.
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*
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* @private
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* @param {string} string The string to convert.
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* @returns {Array} Returns the property path array.
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*/
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function stringToPath(string) {
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var result = [];
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toString(string).replace(rePropName, function(match, number, quote, string) {
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result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
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});
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return result;
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}
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/**
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* Checks if `value` is classified as an `Array` object.
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*
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* @static
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* @memberOf _
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* @type {Function}
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
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* @example
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*
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* _.isArray([1, 2, 3]);
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* // => true
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*
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* _.isArray(document.body.children);
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* // => false
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*
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* _.isArray('abc');
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* // => false
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*
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* _.isArray(_.noop);
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* // => false
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*/
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var isArray = Array.isArray;
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/**
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* This method is like `_.update` except that it accepts `customizer` which is
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* invoked to produce the objects of `path`. If `customizer` returns `undefined`
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* path creation is handled by the method instead. The `customizer` is invoked
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* with three arguments: (nsValue, key, nsObject).
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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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* @category Object
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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 {Function} updater The function to produce the updated value.
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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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* var object = {};
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*
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* _.updateWith(object, '[0][1]', _.constant('a'), Object);
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* // => { '0': { '1': 'a' } }
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*/
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function updateWith(object, path, updater, customizer) {
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customizer = typeof customizer == 'function' ? customizer : undefined;
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return object == null ? object : baseUpdate(object, path, baseCastFunction(updater), customizer);
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}
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/**
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* This method returns the first argument given to it.
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*
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* @static
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* @memberOf _
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* @category Util
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* @param {*} value Any value.
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* @returns {*} Returns `value`.
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* @example
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*
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* var object = { 'user': 'fred' };
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*
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* _.identity(object) === object;
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* // => true
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*/
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function identity(value) {
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return value;
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}
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module.exports = updateWith;
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