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Module

x/unknownutil/mod.ts>isArrayOf

🦕 A lightweight utility pack for handling unknown type
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function isArrayOf
import { isArrayOf } from "https://deno.land/x/unknownutil@v3.18.0/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>