// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license. import * as path from "../path/mod.ts"; export function charCode(s: string): number { return s.charCodeAt(0); } /** Create or open a temporal file at specified directory with prefix and * postfix * */ export async function tempFile( dir: string, opts: { prefix?: string; postfix?: string; } = { prefix: "", postfix: "" }, ): Promise<{ file: Deno.File; filepath: string }> { const r = Math.floor(Math.random() * 1000000); const filepath = path.resolve( `${dir}/${opts.prefix || ""}${r}${opts.postfix || ""}`, ); await Deno.mkdir(path.dirname(filepath), { recursive: true }); const file = await Deno.open(filepath, { create: true, read: true, write: true, append: true, }); return { file, filepath }; }