[Jprogramming] monad vs. dyad

[Geoff Canyon]

I'm trying to write a monadic function that will take a number,  
create a list of that number times 1..6, with each number's  
characters sorted, and return whether they are all the same. So f 17  
would look at the list 17 34 15 68 58 012 and return 0. Here's my  
closest attempt so far:

=/ /:~ each ": each <"0 (>:i.6)*]

<"0 (>:i.6)*26 returns

+--+--+--+---+---+---+
|26|52|78|104|130|156|
+--+--+--+---+---+---+

But

f=:<"0 (>:i.6)*]
    f 26
0 1 1 1 1 1

That looks to me like < is being treated dyadically, and returning  
false, true, true, etc. What do I need to do to force it to box instead?

=/ /:~ each ": each NB. seems to work, but is there a better way than  
two eaches?

Finally, putting it all together:

f=: =/ /:~ each ": each <"0 (>:i.6)*]
    f 4
|domain error: f
|       f 4

Any suggestions?

thanks,

geoff