Edit in JSFiddle

var contact = new Backbone.Model({
     firstName:'John',lastName:'Doe',phone:'1-111-1111'
});

//return array of data/attribute keys
console.log(contact.keys()); //logs ["firstName", "lastName", "phone"]

//return arrry of data/attribute values
console.log(contact.values()); //logs ["John", "Doe", "1-111-1111"]

//copy data/attribute object, return object containing only picked keys
console.log(contact.pick('phone')); //logs {phone="1-111-1111"}

//copy data/attribute object, return object not containing picked keys
console.log(contact.omit('firstName','lastName')); // logs {phone="1-111-1111"}