calculate-from-index-right-x

Calculates a fromIndexRight of a given value for an array.

module.exports(array, fromIndex) ⇒ number ⏏

This method calculates a fromIndexRight of a given value for an array.

Kind: Exported function
Returns: number - The calculated fromIndex. Default is 0.
Throws:

• TypeError If array is null or undefined.

| Param | Type | Description | | --------- | ------------------- | ------------------------------------------------------------------------------------------------------------------ | | array | Array | The array on which to calculate the starting index. | | fromIndex | number | The position in this array at which to begin. A negative value gives the index of array.length + fromIndex by asc. |

Example

import calcFromIndexRight from 'calculate-from-index-right-x';

calcFromIndexRight([1, 2, 3], 1); // 1
calcFromIndexRight([1, 2, 3], Infinity); // 2
calcFromIndexRight([1, 2, 3], -Infinity); // -Infinity
calcFromIndexRight([1, 2, 3], -1); // 2