Run scripts sequentially using map/reduce and jQuery

gistfile1.js

  var files = [
    'first.js',
    'second.js',
    'third.js',
    'fourth.js'
  ];

  var funcs = files.map(function(file) {
    return function() { return $.getScript(file); }
  });

  var deferred = $.Deferred();

  funcs.reduce(function (soFar, f) {
     return soFar.then(f);
  }, deferred.resolve(funcs[0]));