import { isArrayOf } from "https://deno.land/x/unknownutil@v3.18.1/mod.ts";
Return a type predicate function that returns true
if the type of x
is T[]
.
To enhance performance, users are advised to cache the return value of this function and mitigate the creation cost.
import { is } from "@core/unknownutil";
const isMyType = is.ArrayOf(is.String);
const a: unknown = ["a", "b", "c"];
if (isMyType(a)) {
// a is narrowed to string[]
const _: string[] = a;
}
Returns
Predicate<T[]> & WithMetadata<IsArrayOfMetadata>