ko-property-mapping.js

function User(userData) {
  userData = userData || {};
  
  this.name = ko.observable(userData.name);
  
  //copying all non existent properties 
  for(var key in userData) {
    if(!self.hasOwnProperty(key)) {
      self[key] = userData[key];
    }
  }
}

function UsersViewModel() {    
  var myData = [{
    id: "001",
    name: "Jhon",
    status: "Single"
  }, {
    id: "002",
    name: "Mike",
    status: "Married"
  }, {
    id: "003",
    name: "Marrie",
    status: "Complicated"
  }];

  self.users = ko.observableArray(myData.map(function(userData) {
    return new User(userData);
  });
}