bongjovi.js

const pickByName = (obj, prop) => obj[prop];

const pickAndTransformValue = (obj, [prop, transformer]) =>
  transformer(obj[prop]);

const addProps = (obj, [prop, secondProp]) => obj[prop] + obj[secondProp];

const $pickByName = object => property => object[property]
const $pickAndTransformValue = object => ([property, transformer]) => transformer(object[property])
const $addProps = object => ([prop, secondProp]) => object[prop] + object[secondProp];

const $$pickByName = curry(pickByName)
const $$pickAndTransformValue = curry(pickAndTransformValue)
const $$addProps = curry(addProps)

function curry (f) {
  let $args = []

  return g
  
  function g (...xyz) {
    if ($args.length + xyz.length < f.length) {
      $args = $args.concat(xyz)
      return g
    }
    
    return f(...$args, ...xyz)
  }
}