var all = names.length;

var names = ['George','Ringo','Paul','John'];

for(var i=0;i<names.length;i++){

  doSomeThingWith(names[i]);

}

----------------------------------------------------------------

var names = ['George','Ringo','Paul','John'];

var all = names.length;

for(var i=0;i<all;i++){

  doSomeThingWith(names[i]);

}