Re: functions that deal with hash should be more liberal

[Tom Christiansen]

I assure you that the number of people who get compile-time caught
for writing keys or each $x[$i][$j] or pop or push $x[$i][$j] is
*very* large.  This is by far the most prevalent error that happens
with data structures in apprentice and perhaps even journeymen perl
programmers.  Having the compiler immediately report this at run
time is very important, and not at all worth losing.

Go teach thousands of people perl data structures, and then 
you'll see what I mean.

--tom