Avoiding the Reference Problem inside loops

gistfile1.js

// borrowed from jsvascript garden 
// http://bonsaiden.github.com/JavaScript-Garden/#function.closures
// In order to copy the value of the loop's index variable, it is best to use an anonymous wrapper

for(var i = 0; i < 10; i++) {
    (function(e) {
        setTimeout(function() {
            console.log(e);  
        }, 1000);
    })(i);
}

// The anonymous outer function gets called immediately with i as its 
// first argument and will receive a copy 
// of the value of i as its parameter e.

// The anonymous function that gets passed to setTimeout now has a reference to e, whose value does not get // changed by the loop.