1
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var baseFindIndex = require('./_baseFindIndex'),
|
2
|
baseIsNaN = require('./_baseIsNaN'),
|
3
|
strictLastIndexOf = require('./_strictLastIndexOf'),
|
4
|
toInteger = require('./toInteger');
|
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
|
module.exports = lastIndexOf;
|