hshoff

// new crockford module1.js
(function(){
  console.log('module1');

  // return a function that logs it's
  // arguments when invoked
  return function(){
    console.log(arguments);
  };
}())

hshoff

// new module1.js
(function() {
  console.log('module1');

  // return a function that logs it's
  // arguments when invoked
  return function(){
    console.log(arguments);
  };
})()

hshoff

(function(){ return undefined; })()();
// => TypeError: undefined is not a function

// equivalent
(undefined)();

// crockford
(function(){ return undefined; }())();
// => TypeError: undefined is not a function

hshoff

// problem
(function(){console.log('module1');})()(function(){console.log('module2');})();
// => module1
// => TypeError: undefined is not a function

// crockford problem
(function(){console.log('module1');}())(function(){console.log('module2');}());
// => module1
// => module2
// => TypeError: undefined is not a function

hshoff

// module1.js
(function() {
  console.log('module1');
})();

// module2.js
(function() {
  console.log('module2');
})();

hshoff

!function(){}();  // => true
~function(){}(); // => -1
+function(){}(); // => NaN
-function(){}();  // => NaN

hshoff

// Crockford's preference - parens on the inside
(function() {
  console.log('Welcome to the Internet. Please follow me.');
}());

hshoff

(function() {
  console.log('Welcome to the Internet. Please follow me.');
})();

hshoff

// Demo:
// -----------------------------------
// Copy & Paste into the console.
// Optional
//   run test()   => true
//   run test(1) => Error
// newTest = wrap(test, {
//    name: 'test',
//    filename: '/js/danger.js'
// })

hshoff

var sum = new Function('a', 'b', 'return a + b');