how to loop through different classes in javascript code example

Example 1: javascript loop through object example

var person={
 	first_name:"johnny",
  	last_name: "johnson",
	phone:"703-3424-1111"
};
for (var property in person) {
  	console.log(property,":",person[property]);
}

Example 2: javascript loop over classlist

var myElements = document.getElementsByClassName("some_class_name");
for(var i = 0; i < myElements.length; i++){
	console.log(myElements[i]);
}