javascript filter array multiple conditions

var filter = {  address: 'England',  name: 'Mark'};var users = [{    name: 'John',    email: 'johnson@mail.com',    age: 25,    address: 'USA'  },  {    name: 'Tom',    email: 'tom@mail.com',    age: 35,    address: 'England'  },  {    name: 'Mark',    email: 'mark@mail.com',    age: 28,    address: 'England'  }];users= users.filter(function(item) {  for (var key in filter) {    if (item[key] === undefined || item[key] != filter[key])      return false;  }  return true;});console.log(users)