First | /typical/str.ts | rimbu@1.0.2

Using Deno in production at your company? Earn free Deno merch.

Rimbu is a TypeScript library focused on immutable, performant, and type-safe collections and other tools.

type alias First

import { type First } from "https://deno.land/x/rimbu@1.0.2/typical/str.ts";

Returns the first character of the given string, or false if the string is empty.

Examples

Example 1

First<'abc'> => 'a'
First<''> => false

S extends string

definition: S extends Append<infer First, string> ? First : false