tincho

const shallowCompare = (obj1, obj2) =>
  typeof obj1 === 'object' && typeof obj2 === 'object'
    ? Object.keys(obj1).length === Object.keys(obj2).length &&
      Object.keys(obj1).every(
        key => obj2.hasOwnProperty(key) && obj1[key] === obj2[key]
      )
    : obj1 === obj2

const memoizeByProps = (...props) => Component =>
  React.memo(Component, (prevProps, nextProps) =>

tincho

const loop = {
  timer: null,
  count: 0,
  start(fn, time=1000, limit = 100) {
    fn(this.stop.bind(this), this.count);
    this.count++;
    if (this.count < limit) {
      this.timer = setTimeout(() => this.start(fn, time, limit), time)
    } else {
      this.stop()

tincho

// @params: N functions that should return an Object
// @returns a fn that will pass all arg to all fns and return an Obj with all outputs merged
const mergeOutputs = (...fns) => (...args) => fns.reduce((out, fn) => ({
  ...out,
  ...fn(...args)
}), {})


// takes one arg
const one = (name) => ({ hello: name, world: name })

tincho

const combine = (...fns) => (...args) => fns.reduce((returnValues, fn) => [...returnValues, fn(...args)], [])

tincho

these are some samples of coding excercises I have resolved in past interviews

See also:

https://github.com/tincho/trivia-react-challenge

https://github.com/tincho/acme-panel