Check Array of Type

isArrayOfType

Validates that all elements in an array match a specific type guard. Useful for checking homogeneous collections from untyped sources.

function isArrayOfType<T>(
  value: unknown,
  typeCheck: (item: unknown) => item is T
): value is T[]

playground.ts

Validates that the first element of an array matches a specific type guard. Useful for checking homogeneous collections from untyped sources.

import { isFirstElementOfType } from 'toolbox-x/guards';

function isFirstElementOfType<T>(
    value: unknown,
    typeCheck: (item: unknown) => item is T
): value is T[]

Warning

This guard only checks the first element of the array. It does not check the rest of the elements. Use isArrayOfType for a more comprehensive check.

playground.ts