Function guardNonEmptyArray

Enhances a Type Guard so it can be used to check all values of an array. It also checks if the array is non-empty.

Returns

A new Type Guard that takes an array

Example

import { isString, guardNonEmptyArray } from 'type-guard-helpers';
const test = [] as unknown
const isStringArray = guardNonEmptyArray((val): val is readonly [string, ...unknown[]] => isString(val[0]))
if(isStringArray(test)){
   test; // test: readonly [string, ...unknown[]]
}