some FP stuff :)

simple-FP-stuff.js

// compose
const compose = (...fns) => x => 
  fns.reduceRight((v, f) => f(v), x);

/*
const toSlug = compose(
  encodeURIComponent,
  join('-'),
  map(toLowerCase),
  split(' ')
);

console.log(toSlug('JS Cheerleader')); // 'js-cheerleader */

//curry
export const curry = fn => (...args) =>
  args.length < fn.length ? curry(fn.bind(null, ...args)) : fn(...args)

//pipe
const pipe = (...fns) => x => 
  fns.reduce((v, f) => f(v), x);

/*
const fn1 = s => s.toLowerCase();
const fn2 = s => s.split('').reverse().join('');
const fn3 = s => s + '!'

const newFunc = pipe(fn1, fn2, fn3);
*/
const result = newFunc('Time'); // emit!

//trace

const trace = curry((label, x) => {
  console.log(`== ${ label }:  ${ x }`);
  return x;
});

/*
const toSlug = pipe(
  trace('input'),
  split(' '),
  map(toLowerCase),
  trace('after map'),
  join('-'),
  encodeURIComponent
);

console.log(toSlug('JS Cheerleader'));
// '== input:  JS Cheerleader'
// '== after map:  js,cheerleader'
// 'js-cheerleader'
*/