nodejs.array.wtf.s

/*
  save the following file as 'array.js' and run with: node array.js
*/
sys = require('sys');

Array.prototype.foo = function () { return 'foo'; }
Array.prototype.bar = function () { return 'bar'; }

var testArray = [1, 2, 3, 4, 5];

for (var x in testArray) {
    sys.puts(testArray[x]);
}

Fix:

for (var x = 0; x < testArray.length; x++) { }

testArray.forEach(function(element) {
sys.puts(element);
});

for (var x = 0; x < testArray.length; x++) { }

for (var x = 0, l = testArray.length; x < l; x++) { };