Message from JavaScript discussions

September 2017

— I mean, I'm no expert, but that sounds like a bite too big for JS lol

—

Hello everyone, please i just started learning js so i am going through a video by net ninja on node.js... but when i run this code to create a directory and also create a file write.txt in it containing the content from the read.txt file it is just not showing anything in the new directory i created.. What could have gone wrong???
var fs = require('fs');

fs.mkdirSync('stuff', function(){
fs.readFile('read.txt', 'utf8', function(err, data){
fs.writeFile('./stuff/write.txt', data);
});
});

— Remove "Sync"?

— It worked thanks, totally did not see that

— Also look at util.promisify

—

const fs =
  require('fs');
const { promisify } =
  require('util');

const mkdir =
  promisify(fs.mkdir);
const readFile =
  promisify(fs.readFile);
const writeFile =
  promisify(fs.writeFile);

mkdir('stuff')
  .then(() =>
    readFile('read.txt'))
  .then(data =>
    writeFile('stuff/write.txt', data));

Message permanent page

— Okay const means constant and that variable fs can't be changed or reassigned

— Yep

— Always use const unless you plan to reassign

— Okay thank u i will note that down now

— Not really, all it is, is an event loop and cooperative scheduler, things that can be used for any purpose

Message permanent page

— It basically lets seperate things get processing time without returning