You'd probably be more interested in looking at the changes from 5.005 to 5.6.0. That was a much bigger release! Stuff I can't do without from 5.6.0:

• our()
• open(my $foo)
• open(my $foo, ">", $file)
• warn() && exit() inside a BEGIN without complaining about compilation errors

I'm sure there's more. It's been so long since I used 5.005 that I've probably forgotten a lot of the worst stuff.

-sam

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