From: Sean O'Dell <sean@...>
Date: 2002-02-25T11:02:49+09:00
Subject: Hash.each block parameters

I ran into a problem where I should have called .each_key for a hash, but I
was calling .each and so I wrote it like this:

myhash.each do | key |
end

I couldn't get values out of the hash using the key during the block
iterations.  nil was always returned.

I studied my code awhile and realized I should be using each_key.  Hash.each
provides TWO block parameters, not one like each_key (the key).  I added the
second parameter and things were fine again.

It did this very quietly, no error or anything...I just got nil values and
scratched my head until I figured it out.  Is there a parameter to make Ruby
stricter towards this sort of thing?

    Sean