async foreach

1  for (const file of files) {
2    const contents = await fs.readFile(file, 'utf8');
3    console.log(contents);
4  }
5 

1[1, 2, 3].forEach(async (num) => {  await waitFor(50);  console.log(num);});console.log('Done');

1Array.prototype.forEachAsync = async function (fn) {
2    for (let t of this) { await fn(t) }
3}
4
5Array.prototype.forEachAsyncParallel = async function (fn) {
6    await Promise.all(this.map(fn));
7}
8

1async function printFiles () {
2  const files = await getFilePaths();
3
4  for (const file of files) {
5    const contents = await fs.readFile(file, 'utf8');
6    console.log(contents);
7  }
8}
9

1// Javascript will proceed to call the code that comes AFTER the forEach loop, 
2// and then execute the code within the loop. This is because forEach is not 
3// async-aware. YOU CANNOT USE AWAIT IN FOREACH. Use a regular for loop instead.