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76 lines
2.6 KiB
JavaScript
76 lines
2.6 KiB
JavaScript
/**
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* lodash 4.2.1 (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 baseIteratee = require('lodash._baseiteratee'),
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baseSlice = require('lodash._baseslice');
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/**
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* The base implementation of methods like `_.dropWhile` and `_.takeWhile`
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* without support for iteratee shorthands.
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*
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* @private
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* @param {Array} array The array to query.
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* @param {Function} predicate The function invoked per iteration.
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* @param {boolean} [isDrop] Specify dropping elements instead of taking them.
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* @param {boolean} [fromRight] Specify iterating from right to left.
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* @returns {Array} Returns the slice of `array`.
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*/
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function baseWhile(array, predicate, isDrop, fromRight) {
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var length = array.length,
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index = fromRight ? length : -1;
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while ((fromRight ? index-- : ++index < length) &&
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predicate(array[index], index, array)) {}
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return isDrop
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? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
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: baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
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}
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/**
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* Creates a slice of `array` excluding elements dropped from the end.
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* Elements are dropped until `predicate` returns falsey. The predicate is
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* invoked with three arguments: (value, index, 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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* @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
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* @returns {Array} Returns the slice of `array`.
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* @example
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*
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* var users = [
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* { 'user': 'barney', 'active': true },
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* { 'user': 'fred', 'active': false },
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* { 'user': 'pebbles', 'active': false }
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* ];
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*
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* _.dropRightWhile(users, function(o) { return !o.active; });
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* // => objects for ['barney']
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*
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* // The `_.matches` iteratee shorthand.
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* _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
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* // => objects for ['barney', 'fred']
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*
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* // The `_.matchesProperty` iteratee shorthand.
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* _.dropRightWhile(users, ['active', false]);
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* // => objects for ['barney']
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*
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* // The `_.property` iteratee shorthand.
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* _.dropRightWhile(users, 'active');
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* // => objects for ['barney', 'fred', 'pebbles']
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*/
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function dropRightWhile(array, predicate) {
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return (array && array.length)
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? baseWhile(array, baseIteratee(predicate, 3), true, true)
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: [];
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}
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module.exports = dropRightWhile;
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