1 | import baseFindIndex from './_baseFindIndex.js';
|
---|
2 | import baseIsNaN from './_baseIsNaN.js';
|
---|
3 | import strictLastIndexOf from './_strictLastIndexOf.js';
|
---|
4 | import toInteger from './toInteger.js';
|
---|
5 |
|
---|
6 | /* Built-in method references for those with the same name as other `lodash` methods. */
|
---|
7 | var nativeMax = Math.max,
|
---|
8 | nativeMin = Math.min;
|
---|
9 |
|
---|
10 | /**
|
---|
11 | * This method is like `_.indexOf` except that it iterates over elements of
|
---|
12 | * `array` from right to left.
|
---|
13 | *
|
---|
14 | * @static
|
---|
15 | * @memberOf _
|
---|
16 | * @since 0.1.0
|
---|
17 | * @category Array
|
---|
18 | * @param {Array} array The array to inspect.
|
---|
19 | * @param {*} value The value to search for.
|
---|
20 | * @param {number} [fromIndex=array.length-1] The index to search from.
|
---|
21 | * @returns {number} Returns the index of the matched value, else `-1`.
|
---|
22 | * @example
|
---|
23 | *
|
---|
24 | * _.lastIndexOf([1, 2, 1, 2], 2);
|
---|
25 | * // => 3
|
---|
26 | *
|
---|
27 | * // Search from the `fromIndex`.
|
---|
28 | * _.lastIndexOf([1, 2, 1, 2], 2, 2);
|
---|
29 | * // => 1
|
---|
30 | */
|
---|
31 | function lastIndexOf(array, value, fromIndex) {
|
---|
32 | var length = array == null ? 0 : array.length;
|
---|
33 | if (!length) {
|
---|
34 | return -1;
|
---|
35 | }
|
---|
36 | var index = length;
|
---|
37 | if (fromIndex !== undefined) {
|
---|
38 | index = toInteger(fromIndex);
|
---|
39 | index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
|
---|
40 | }
|
---|
41 | return value === value
|
---|
42 | ? strictLastIndexOf(array, value, index)
|
---|
43 | : baseFindIndex(array, baseIsNaN, index, true);
|
---|
44 | }
|
---|
45 |
|
---|
46 | export default lastIndexOf;
|
---|