mirror of
https://github.com/whoisclebs/lodash.git
synced 2026-02-02 16:17:50 +00:00
96 lines
2.9 KiB
JavaScript
96 lines
2.9 KiB
JavaScript
/**
|
|
* lodash 3.1.1 (Custom Build) <https://lodash.com/>
|
|
* Build: `lodash modern modularize exports="npm" -o ./`
|
|
* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
|
|
* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
|
|
* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
|
|
* Available under MIT license <https://lodash.com/license>
|
|
*/
|
|
var baseAt = require('lodash._baseat'),
|
|
baseCompareAscending = require('lodash._basecompareascending'),
|
|
baseFlatten = require('lodash._baseflatten'),
|
|
restParam = require('lodash.restparam');
|
|
|
|
/** Used for native method references. */
|
|
var arrayProto = Array.prototype;
|
|
|
|
/** Native method references. */
|
|
var splice = arrayProto.splice;
|
|
|
|
/**
|
|
* Used as the [maximum length](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer)
|
|
* of an array-like value.
|
|
*/
|
|
var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
|
|
|
|
/**
|
|
* The base implementation of `_.pullAt` without support for individual
|
|
* index arguments and capturing the removed elements.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to modify.
|
|
* @param {number[]} indexes The indexes of elements to remove.
|
|
* @returns {Array} Returns `array`.
|
|
*/
|
|
function basePullAt(array, indexes) {
|
|
var length = indexes.length;
|
|
while (length--) {
|
|
var index = parseFloat(indexes[length]);
|
|
if (index != previous && isIndex(index)) {
|
|
var previous = index;
|
|
splice.call(array, index, 1);
|
|
}
|
|
}
|
|
return array;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is a valid array-like index.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
|
|
* @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
|
|
*/
|
|
function isIndex(value, length) {
|
|
value = +value;
|
|
length = length == null ? MAX_SAFE_INTEGER : length;
|
|
return value > -1 && value % 1 == 0 && value < length;
|
|
}
|
|
|
|
/**
|
|
* Removes elements from `array` corresponding to the given indexes and returns
|
|
* an array of the removed elements. Indexes may be specified as an array of
|
|
* indexes or as individual arguments.
|
|
*
|
|
* **Note:** Unlike `_.at`, this method mutates `array`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to modify.
|
|
* @param {...(number|number[])} [indexes] The indexes of elements to remove,
|
|
* specified as individual indexes or arrays of indexes.
|
|
* @returns {Array} Returns the new array of removed elements.
|
|
* @example
|
|
*
|
|
* var array = [5, 10, 15, 20];
|
|
* var evens = _.pullAt(array, 1, 3);
|
|
*
|
|
* console.log(array);
|
|
* // => [5, 15]
|
|
*
|
|
* console.log(evens);
|
|
* // => [10, 20]
|
|
*/
|
|
var pullAt = restParam(function(array, indexes) {
|
|
array || (array = []);
|
|
indexes = baseFlatten(indexes);
|
|
|
|
var result = baseAt(array, indexes);
|
|
basePullAt(array, indexes.sort(baseCompareAscending));
|
|
return result;
|
|
});
|
|
|
|
module.exports = pullAt;
|