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94 lines
2.8 KiB
JavaScript
94 lines
2.8 KiB
JavaScript
/**
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* lodash 3.0.0 (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 1.7.0 <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 baseAt = require('lodash._baseat'),
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baseCompareAscending = require('lodash._basecompareascending'),
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baseFlatten = require('lodash._baseflatten');
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/** Used for native method references. */
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var arrayProto = Array.prototype;
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/** Native method references. */
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var splice = arrayProto.splice;
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/**
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* Used as the maximum length of an array-like value.
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* See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer)
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* for more details.
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*/
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var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
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/**
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* The base implementation of `_.pullAt` without support for individual
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* index arguments.
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*
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* @private
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* @param {Array} array The array to modify.
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* @param {number[]} indexes The indexes of elements to remove.
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* @returns {Array} Returns the new array of removed elements.
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*/
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function basePullAt(array, indexes) {
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var length = indexes.length,
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result = baseAt(array, indexes);
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indexes.sort(baseCompareAscending);
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while (length--) {
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var index = parseFloat(indexes[length]);
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if (index != previous && isIndex(index)) {
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var previous = index;
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splice.call(array, index, 1);
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}
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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 a valid array-like index.
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*
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* @private
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* @param {*} value The value to check.
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* @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
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* @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
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*/
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function isIndex(value, length) {
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value = +value;
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length = length == null ? MAX_SAFE_INTEGER : length;
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return value > -1 && value % 1 == 0 && value < length;
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}
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/**
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* Removes elements from `array` corresponding to the given indexes and returns
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* an array of the removed elements. Indexes may be specified as an array of
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* indexes or as individual arguments.
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*
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* **Note:** Unlike `_.at`, this method mutates `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 modify.
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* @param {...(number|number[])} [indexes] The indexes of elements to remove,
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* specified as individual indexes or arrays of indexes.
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* @returns {Array} Returns the new array of removed elements.
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* @example
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*
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* var array = [5, 10, 15, 20];
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* var evens = _.pullAt(array, 1, 3);
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*
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* console.log(array);
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* // => [5, 15]
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*
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* console.log(evens);
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* // => [10, 20]
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*/
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function pullAt(array) {
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return basePullAt(array || [], baseFlatten(arguments, false, false, 1));
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}
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module.exports = pullAt;
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