Introducing Piwa • Arthur Brière

Where it all started

As a JS developer, I have two main issues to write clean code. The first is the callback style, like:

fs.readFile(`path-to-my-file`, (err, data) => {
  // Do some stuff with my data
});

Not really scary at first sight, but it can be, if for example the file contains a list of paths that you want to read after. It becomes:

// -- my-files-list.txt --
// file-1.txt
// file-2.txt
// file-3.txt


fs.readFile('my-files-list.txt, (err, data) => {
  // Get the files
  // files = ["file-1.txt", "files-2.txt", "file-3.txt"];
  const files = data.toString().split(/\r?\n/);
  files.forEach((file) => {
    fs.readFile(file, (err, data) => {
      // Do some stuff with sub files
    })
  })
}