mirror of
https://github.com/whoisclebs/lodash.git
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114 lines
3.2 KiB
JavaScript
114 lines
3.2 KiB
JavaScript
/**
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* lodash 3.7.2 (Custom Build) <https://lodash.com/>
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* Build: `lodash modern modularize exports="npm" -o ./`
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* Copyright 2012-2015 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 2009-2015 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 baseGet = require('lodash._baseget'),
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baseSlice = require('lodash._baseslice'),
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toPath = require('lodash._topath'),
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isArray = require('lodash.isarray');
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/** Used to match property names within property paths. */
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var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\n\\]|\\.)*?\1)\]/,
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reIsPlainProp = /^\w*$/;
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/**
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* Invokes the method at `path` on `object`.
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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 method to invoke.
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* @param {Array} args The arguments to invoke the method with.
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* @returns {*} Returns the result of the invoked method.
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*/
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function invokePath(object, path, args) {
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if (object != null && !isKey(path, object)) {
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path = toPath(path);
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object = path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
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path = last(path);
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}
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var func = object == null ? object : object[path];
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return func == null ? undefined : func.apply(object, args);
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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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var type = typeof value;
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if ((type == 'string' && reIsPlainProp.test(value)) || type == 'number') {
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return true;
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}
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if (isArray(value)) {
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return false;
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}
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var result = !reIsDeepProp.test(value);
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return result || (object != null && value in toObject(object));
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}
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/**
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* Converts `value` to an object if it's not one.
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*
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* @private
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* @param {*} value The value to process.
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* @returns {Object} Returns the object.
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*/
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function toObject(value) {
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return isObject(value) ? value : Object(value);
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}
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/**
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* Gets the last element of `array`.
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*
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* @static
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* @memberOf _
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* @category Array
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* @param {Array} array The array to query.
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* @returns {*} Returns the last element of `array`.
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* @example
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*
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* _.last([1, 2, 3]);
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* // => 3
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*/
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function last(array) {
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var length = array ? array.length : 0;
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return length ? array[length - 1] : undefined;
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}
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/**
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* Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
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* (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
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*
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* @static
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* @memberOf _
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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 an object, else `false`.
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* @example
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*
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* _.isObject({});
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* // => true
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*
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* _.isObject([1, 2, 3]);
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* // => true
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*
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* _.isObject(1);
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* // => false
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*/
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function isObject(value) {
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// Avoid a V8 JIT bug in Chrome 19-20.
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// See https://code.google.com/p/v8/issues/detail?id=2291 for more details.
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var type = typeof value;
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return !!value && (type == 'object' || type == 'function');
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}
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module.exports = invokePath;
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