effect-io-ai

Package: effect
Module: Option

Option.isSome

Checks whether an Option contains a value (Some).

When to use

Use when you need to branch on a present Option before accessing .value.

Details

• Acts as a type guard, narrowing to Some<A>

Example (Checking for Some)

import { Option } from "effect"

console.log(Option.isSome(Option.some(1)))
// Output: true

console.log(Option.isSome(Option.none()))
// Output: false

See

• isNone for the opposite check.

Signature

declare const isSome: <A>(self: Option<A>) => self is Some<A>

Source

Since v2.0.0