ericelliott

//-------------------------------------------------------------
//
// Hypothesis:
//
// Promises/A is a Monad
//
// To be a Monad, it must provide at least:
// - A unit (aka return or mreturn) operation that creates a corresponding
//   monadic value from a non-monadic value.
// - A bind operation that applies a function to a monadic value

ericelliott

function extend(obj) {
  var args = [].slice.call(arguments, 1);
  args.forEach(function (source) {
    var prop;
    for (prop in source) {
      if (source.hasOwnProperty(prop)) {
        obj[prop] = source[prop]; 
      }
    }
  });

ericelliott

var jsonp = {
    callbackCounter: 0,

    fetch: function(url, callback) {
        var fn = 'JSONPCallback_' + this.callbackCounter++;
        window[fn] = this.evalJSONP(callback);
        url = url.replace('=JSONPCallback', '=' + fn);

        var scriptTag = document.createElement('SCRIPT');
        scriptTag.src = url;