1 | import baseFindIndex from './_baseFindIndex.js';
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2 | import baseIteratee from './_baseIteratee.js';
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3 | import toInteger from './toInteger.js';
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4 |
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5 | /* Built-in method references for those with the same name as other `lodash` methods. */
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6 | var nativeMax = Math.max,
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7 | nativeMin = Math.min;
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8 |
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9 | /**
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10 | * This method is like `_.findIndex` except that it iterates over elements
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11 | * of `collection` from right to left.
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12 | *
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13 | * @static
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14 | * @memberOf _
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15 | * @since 2.0.0
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16 | * @category Array
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17 | * @param {Array} array The array to inspect.
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18 | * @param {Function} [predicate=_.identity] The function invoked per iteration.
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19 | * @param {number} [fromIndex=array.length-1] The index to search from.
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20 | * @returns {number} Returns the index of the found element, else `-1`.
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21 | * @example
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22 | *
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23 | * var users = [
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24 | * { 'user': 'barney', 'active': true },
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25 | * { 'user': 'fred', 'active': false },
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26 | * { 'user': 'pebbles', 'active': false }
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27 | * ];
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28 | *
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29 | * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
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30 | * // => 2
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31 | *
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32 | * // The `_.matches` iteratee shorthand.
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33 | * _.findLastIndex(users, { 'user': 'barney', 'active': true });
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34 | * // => 0
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35 | *
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36 | * // The `_.matchesProperty` iteratee shorthand.
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37 | * _.findLastIndex(users, ['active', false]);
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38 | * // => 2
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39 | *
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40 | * // The `_.property` iteratee shorthand.
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41 | * _.findLastIndex(users, 'active');
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42 | * // => 0
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43 | */
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44 | function findLastIndex(array, predicate, fromIndex) {
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45 | var length = array == null ? 0 : array.length;
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46 | if (!length) {
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47 | return -1;
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48 | }
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49 | var index = length - 1;
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50 | if (fromIndex !== undefined) {
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51 | index = toInteger(fromIndex);
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52 | index = fromIndex < 0
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53 | ? nativeMax(length + index, 0)
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54 | : nativeMin(index, length - 1);
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55 | }
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56 | return baseFindIndex(array, baseIteratee(predicate, 3), index, true);
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57 | }
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58 |
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59 | export default findLastIndex;
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