From: Joel VanderWerf <vjoel@...>
Date: 2002-12-12T06:00:45+09:00
Subject: Regex#hash


Why doesn't Regex#hash behave like String#hash?

irb(main):009:0> "a".hash
100
irb(main):010:0> "a".hash
100
irb(main):011:0> /a/.hash
537976558
irb(main):012:0> /a/.hash
537970778

And yet...

irb(main):013:0> /a/ == /a/
true


Regexes seem pretty immutable to me, or more so than strings anyway, so 
it seems resonable to hash based on whatever Regex#== looks at, rather 
than use #id as the hash val.