pipe.js

// The proposal
const doubleSay = str => str + ', ' + str;
const capitalize = str => str[0].toUpperCase() + str.substring(1);
const exclaim = str => str + '!';

let result = "hello"
              |> doubleSay
              |> capitalize
              |> exclaim

// What if instead
let transform = doubleSay |> capitalize |> exclaim
let result = transform("hello");