Q:

Showing date from two rows in table view, respectively in two text fields, via binding

I have a class named as transaction in which one attribute is transactionDate which is of type NSDate.
I am using NSArrayController to display a list of transactions in a table view.
My requirement is-

I want to show date in first row in a
  text field labeled as "From" and date
  in last row in a text field labeled as
  "To".

My questions is-

Can I achieve this via binding in IB?
  If yes then how?

Thanks,
Miraaj

A:

Yes, you can do this (or something like it), see the @min and @max array operators.
Here's how to do a very simple version of this:

Open Interface Builder - create a new application
Add an NSArrayController, set it to automatically prepare content.  
Add a Table, label the two columns "name" and "age"
Add a Button (labelled "+") and two Labels (change name to maxval, minval)
Wire up the NSArrayController bindings as follows:

Here's the application running (just in interface builder "simulate" mode).  To use it, click + then click on the top row of the table and put a name in the first column and an age in the second.  Then repeat for a few more people.

This all looks a bit cryptic, but it is sufficient.  I added the labels "Max Age" and "Min Age" for clarity in my version.

