order of sourcing

[Ray Andrews <rayandrews@xxxxxxxxxxx>]

I'd like to clear up a little bother:

file aa:

aa ()
{
    bb "howdy!"
}

file bb:

bb ()
{
    echo $1
}

4 /aWorking/Zsh/Source/Wk/Test 0 $ . *    # Just sourcing 'aa' and 'bb'.

4 /aWorking/Zsh/Source/Wk/Test 0 $ aa
aa:2: permission denied: bb

4 /aWorking/Zsh/Source/Wk/Test 0 $ . bb; aa
howdy!

... I think I get it:  'aa' is sourced first and thus 'aa ()' doesn't 
know what 'bb ()' looks like so throws an error until 'bb' is sourced 
again.  But shouldn't 'aa ()' sorta find 'bb ()'  in real time?  It's 
easy enough to deal with but I'm betting there's an easy and better 
solution that doesn't involve ad hoc re-sourcing.