JS Functional Programming

javascript-functional-programming.md

Monads

function Monad(modifier) {
  return function unit(value) {
    var monad = Object.create(null);
    monad.bind = function (func) {
      return func(value);
    }
    return monad;
  }
}

var idnt = Monad();
var monad = idnt('test');
monad.bind(console.log);

Maybe Monad

function Monad(modifier) {
  var prototype = Object.create(null);
  function unit(value) {
    var monad = Object.create(prototype);
    monad.bind = function (func, args) {
      return func(value, ...args);
    }
    if (typeof modifier == 'function') {
      modifier(monad, value);
    }
    return monad;
  }
  return unit;
}

var maybe = Monad(function (monad, value) {
  if (value === null || value === undefined) {
    monad.is_null = true;
    monad.bind = function () {
      return monad;
    }
  }
}
var monad = maybe(null);
monad.bind(console.log);

• https://curiosity-driven.org/monads-in-javascript