O | /src/option/mod.ts | ahh@v0.10.3

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Idiomatic type-safety functions.

method O.isSome

import { O } from "https://deno.land/x/ahh@v0.10.3/src/option/mod.ts";

isSome<T>(opt: Option<T>): opt is Some<T>

Returns whether opt is a Some.

Examples

Example 1

import { O, None } from "./mod.ts";

console.log(O.isSome(1)); // true
console.log(O.isSome(None)); // false