javascript pass this to callback

makeHTTPRequest('GET', 'http://youramazingapi/money_makers.php').then(function(data){
    this.shakeThose.push(data);
}.bind(this));

function functionOne(x) { alert(x); }

function functionTwo(var1, callback) {
    callback(var1);		
}

functionTwo(2, functionOne);

for (var i = 0; i < a.length; i++) (function(i)
{          
	//some function here
  
}) (i);