You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.3 KiB
46 lines
1.3 KiB
import baseFindIndex from './_baseFindIndex.js'; |
|
import baseIsNaN from './_baseIsNaN.js'; |
|
import strictLastIndexOf from './_strictLastIndexOf.js'; |
|
import toInteger from './toInteger.js'; |
|
|
|
/* Built-in method references for those with the same name as other `lodash` methods. */ |
|
var nativeMax = Math.max, |
|
nativeMin = Math.min; |
|
|
|
/** |
|
* This method is like `_.indexOf` except that it iterates over elements of |
|
* `array` from right to left. |
|
* |
|
* @static |
|
* @memberOf _ |
|
* @since 0.1.0 |
|
* @category Array |
|
* @param {Array} array The array to inspect. |
|
* @param {*} value The value to search for. |
|
* @param {number} [fromIndex=array.length-1] The index to search from. |
|
* @returns {number} Returns the index of the matched value, else `-1`. |
|
* @example |
|
* |
|
* _.lastIndexOf([1, 2, 1, 2], 2); |
|
* // => 3 |
|
* |
|
* // Search from the `fromIndex`. |
|
* _.lastIndexOf([1, 2, 1, 2], 2, 2); |
|
* // => 1 |
|
*/ |
|
function lastIndexOf(array, value, fromIndex) { |
|
var length = array == null ? 0 : array.length; |
|
if (!length) { |
|
return -1; |
|
} |
|
var index = length; |
|
if (fromIndex !== undefined) { |
|
index = toInteger(fromIndex); |
|
index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1); |
|
} |
|
return value === value |
|
? strictLastIndexOf(array, value, index) |
|
: baseFindIndex(array, baseIsNaN, index, true); |
|
} |
|
|
|
export default lastIndexOf;
|
|
|