for(var i = 0; i < list.length; i++){
    mc_cli.get(list[i], function(err, response) {
        do_something(i);
    });
}

do_something((function(x){return x})(i))

var create_closure = function(i) {
    return function() {
        return i;
    }
}

do_something(create_closure(i)())

list.forEach(function(listItem, index){
  mc_cli.get(listItem, function(err, response) {
    do_something(index);
  });
});

var total = parsed_result.list.length;
var count = 0;

for(var i = 0; i < total; i++){
    (function(foo){
        mc_cli.get(parsed_result.list[foo], function(err, response) {
            do_something(foo);
            count++;
            if (count > total - 1) done();
        });
    }(i));
}

// You can guarantee that this function will not be called until ALL of the
// asynchronous functions have completed.
function done() {
    console.log('All data has been loaded :).');
}

function createCallback(i) {
    return function(){
        do_something(i);
    }
}


for(var i = 0; i < list.length; i++){
    mc_cli.get(list[i], createCallback(i));
}

for(let i = 0; i < list.length; i++){
    mc_cli.get(list[i], function(err, response) {
        do_something(i);
    });
}

var arr = ['Hello', 'World', 'Javascript', 'Async', ':)'];
for( var i = 0; i < arr.length; i++) {
  (function(index){
    setTimeout(function(){
       console.log(arr[index]);
 }, 500);