achinara

function mapValues(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    result[key] = fn(obj[key], key);
    return result;
  }, {});
}

function pick(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    if (fn(obj[key])) {

achinara

Core Principals

• Read lots of code.
• Write lots of code.
• Don’t be afraid to throw it away.
• Don’t be afraid to share it.
• Find your happy place writing tests.
  • You’ll probably spend more time writing tests and debugging than writing code. Embrace this. Make it a key part of your workflow.
  • Tests are one of the first things I read in a module. That and the example(s). Probably before API docs.
• Don’t know where to start. Write some tests for a module you like. This benefits everyone.