calculate-from-index-x

Calculates a fromIndex of a given value for an array.

module.exports(array, fromIndex) ⇒ number ⏏

This method calculates a fromIndex 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 calcFromIndex from 'calculate-from-index-x';

console.log(calcFromIndex([1, 2, 3], 1)); // 1
console.log(calcFromIndex([1, 2, 3], Infinity)); // Infinity
console.log(calcFromIndex([1, 2, 3], -Infinity)); // 0
console.log(calcFromIndex([1, 2, 3], -1)); // 2