I am new to mac development. I am trying to make this app from apple.com
At one point i am stucked in interface builder.

How do i connect arrangedObjects.firstName to the Value - Table Column - First Name and Last Name?
Edit:
this is my array controller and its bindings.

Thank you in advance..!!
Ctrl Shift click with a mouse on a column in your table (NOT column’s header). You should see the list of views which are parent to each other:
Select
NSTableColumnview. Then just open bindings tab and perform same procedure as with arrangedObjects’ binding.