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79 lines
2.3 KiB
JavaScript
79 lines
2.3 KiB
JavaScript
/**
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* lodash 4.1.1 (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 baseFlatten = require('lodash._baseflatten'),
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rest = require('lodash.rest');
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/**
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* A specialized version of `_.reduce` for arrays without support for
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* iteratee shorthands.
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*
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* @private
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* @param {Array} array The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @param {*} [accumulator] The initial value.
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* @param {boolean} [initAccum] Specify using the first element of `array` as
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* the initial value.
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* @returns {*} Returns the accumulated value.
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*/
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function arrayReduce(array, iteratee, accumulator, initAccum) {
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var index = -1,
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length = array.length;
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if (initAccum && length) {
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accumulator = array[++index];
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}
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while (++index < length) {
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accumulator = iteratee(accumulator, array[index], index, array);
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}
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return accumulator;
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}
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/**
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* The base implementation of `_.pick` without support for individual
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* property identifiers.
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*
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* @private
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* @param {Object} object The source object.
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* @param {string[]} props The property identifiers to pick.
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* @returns {Object} Returns the new object.
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*/
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function basePick(object, props) {
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object = Object(object);
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return arrayReduce(props, function(result, key) {
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if (key in object) {
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result[key] = object[key];
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}
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return result;
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}, {});
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}
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/**
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* Creates an object composed of the picked `object` properties.
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*
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* @static
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* @since 0.1.0
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* @memberOf _
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* @category Object
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* @param {Object} object The source object.
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* @param {...(string|string[])} [props] The property identifiers to pick,
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* specified individually or in arrays.
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* @returns {Object} Returns the new object.
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* @example
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*
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* var object = { 'a': 1, 'b': '2', 'c': 3 };
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*
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* _.pick(object, ['a', 'c']);
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* // => { 'a': 1, 'c': 3 }
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*/
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var pick = rest(function(object, props) {
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return object == null ? {} : basePick(object, baseFlatten(props, 1));
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});
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module.exports = pick;
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