Pass argument to setTimeout inside loop

using_bind_method.js

/*
Syntax
  fun.bind(thisArg[, arg1[, arg2[, ...]]])
Parameters
  thisArg
    The value to be passed as the this parameter to the target function when the bound function is called. The value is ignored if the bound function is constructed using the new operator.
    Passed undefined = use original this
  arg1, arg2, ...
    Arguments to prepend to arguments provided to the bound function when invoking the target function.
Return value
  A copy of the given function with the specified this value and initial arguments.
*/
for(var i = 0; i < 10; i++) {
    setTimeout(function(i){
        console.log(i);
    }.bind(undefined, i), 1000 * i);
}

using_closure.js

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