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Module

x/optio/mod.ts>isNone

Minimum option type port of Rust
TomokiMiyauci/option
Latest
function isNone
import { isNone } from "https://deno.land/x/optio@1.0.0/mod.ts";

Returns true if the option is a None.

Examples

Example 1

import { isNone, None, Option } from "https://deno.land/x/optio/mod.ts";
import { assert } from "https://deno.land/std/testing/asserts.ts";

const option: Option<unknown> = None;
assert(isNone(option));

Parameters

option: Readonly<Option<unknown>>

Returns

option is None