deno

(Update: wrapping code in async function main() { … } is no longer needed because Deno now supports top-level await) Using built-in Deno.readTextFile const countWords = (s: string): number => s.split(/\s+/g).filter(w => /[a-z0-9]/.test(w)).length; const text = await Deno.readTextFile(‘input.txt’); const count = countWords(text); console.log(`I read ${count} words.`); See the docs at: https://doc.deno.land/builtin/stable#Deno.readTextFile Using built-in Deno.readFile const … Read more

There is the standard library implementation, here: https://deno.land/std/fs/mod.ts import {existsSync} from “https://deno.land/std/fs/mod.ts”; const pathFound = existsSync(filePath) console.log(pathFound) This code will print true if the path exists and false if not. And this is the async implementation: import {exists} from “https://deno.land/std/fs/mod.ts” exists(filePath).then((result : boolean) => console.log(result)) Make sure you run deno with the unstable flag and … Read more