remove property from javascript object

var person = {"first_name": "Billy","last_name": "Johnson"};
delete person.last_name; //delete last_name propertyvar myObject = {
    "name": "jon",
    "gender": "male",
    "registered": "yes"
};
delete myObject.gender;

console.log(myObject);

//other methods
delete myObject.gender;
// or,
delete myObject['gender'];
// or,
var prop = "gender";
delete myObject[prop];