can I select over functions?

[Marc van Woerkom]

The pseudo code in the icfp contest task had some piece 
like

    case instruction of
      move(Ant, Steps) ->
         ..
      turn(LeftRight) ->
         ..
      sense(Direction, Time, Moonphase) ->
         ..
    end

where the different cases are not simple values like a 
token for the intended instruction, but functions.

Is there some means to identify a function (compare it to 
a given function) that gets passed as argument? 

Regards,
Marc