Function isRelativeIndex

Checks if a Number is a RelativeIndex of an ArrayLike

Example

A RelativeIndex can be negative

const result = isRelativeIndex(index)([1, 2, 3]);

console.log(result); // true

Example

Works with Strings, too

const result = isRelativeIndex(-5)("test");

console.log(result); // false

Returns

true if the index is between -array.length and array.length, otherwise false