The use of each is that it's not a memory hog. When you loop over keys, Perl has somewhere built a list of all the keys in the hash. This is especially disastrous when the hash is tied to some huge data set.

The real problem with each is that every hash has only one iterator, and if you drop out of a loop that's walking the hash, the next loop that tries to walk that hash will start where the first left off.

In reply to Re^3: Hash value interpolation by kyle
in thread Hash value interpolation by csarid

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