Function satisfies

Returns true if the array element at index exists and satisfies condition. Negative indices count backwards from the end of the array.

Remarks

This function is designed to improve developer experience by eliminating the need to account for the undefined type when accessing an array element.

Example

import * as A from "flurp/array";
import * as N from "flurp/number";

const indexTwoPositive = A.satisfies(3, N.isPositive);
indexTwoPositive([1, -2, 3, -4]);     // true
indexTwoPositive([-1, 2, -3, 4]);     // false
indexTwoPositive([1, 2]);             // false

const lastPositive = A.satisfies(-1, N.isPositive);
lastPositive([1, -2, 3]);             // true