$obj = new Object();
$obj.surname = "smith";
$field_name = "surname";
alert($obj.$field_name); //error!!
Wth? How do I do this with js? I need to access all values in an object within a foreach but I can't manage to access obj proprerties by reference!
$obj[$field_name] will do. It's the same with the literal keys: you may use object['id'] as well as object.id - the latter is shorter, though. )
you can access each property by entering the name of the property as a key .
JavaScript automatically creates a associative array for each object where the keys are properties names and values are there value .
So instead of $obj.$field_name use $obj[$field_name]
because $obj.feild_name is like $obj."surname"
check this Objects as associative arrays
