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			60 lines
		
	
	
		
			1.7 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			60 lines
		
	
	
		
			1.7 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
var baseFindIndex = require('./_baseFindIndex'),
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    baseIteratee = require('./_baseIteratee'),
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    toInteger = require('./toInteger');
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/* Built-in method references for those with the same name as other `lodash` methods. */
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var nativeMax = Math.max,
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    nativeMin = Math.min;
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/**
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 * This method is like `_.findIndex` except that it iterates over elements
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 * of `collection` from right to left.
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 *
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 * @static
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 * @memberOf _
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 * @since 2.0.0
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 * @category Array
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 * @param {Array} array The array to inspect.
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 * @param {Function} [predicate=_.identity] The function invoked per iteration.
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 * @param {number} [fromIndex=array.length-1] The index to search from.
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 * @returns {number} Returns the index of the found element, else `-1`.
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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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 * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
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 * // => 2
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 *
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 * // The `_.matches` iteratee shorthand.
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 * _.findLastIndex(users, { 'user': 'barney', 'active': true });
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 * // => 0
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 *
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 * // The `_.matchesProperty` iteratee shorthand.
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 * _.findLastIndex(users, ['active', false]);
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 * // => 2
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 *
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 * // The `_.property` iteratee shorthand.
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 * _.findLastIndex(users, 'active');
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 * // => 0
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 */
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function findLastIndex(array, predicate, fromIndex) {
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  var length = array == null ? 0 : array.length;
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  if (!length) {
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    return -1;
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  }
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  var index = length - 1;
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  if (fromIndex !== undefined) {
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    index = toInteger(fromIndex);
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    index = fromIndex < 0
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      ? nativeMax(length + index, 0)
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      : nativeMin(index, length - 1);
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  }
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  return baseFindIndex(array, baseIteratee(predicate, 3), index, true);
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}
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module.exports = findLastIndex;
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