effect-io-ai

Package: effect
Module: Array

Array.isArray

Checks whether a value is an Array.

When to use

Use to verify a value is a mutable array, narrowing its type to Array<unknown>.

Details

Acts as a type guard narrowing the input to Array<unknown> and delegates to globalThis.Array.isArray.

Example (Type-guarding an unknown value)

import { Array } from "effect"

console.log(Array.isArray(null)) // false
console.log(Array.isArray([1, 2, 3])) // true

See

• isArrayEmpty — check for an empty array
• isArrayNonEmpty — check for a non-empty array

Signature

declare const isArray: { (self: unknown): self is Array<unknown>; <T>(self: T): self is Extract<T, ReadonlyArray<any>>; }

Source

Since v2.0.0