Re^3: unexpected modify hash in a distance with grep { $


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Re^3: unexpected modify hash in a distance with grep { $_ }

by afoken (Chancellor)

on Dec 20, 2019 at 21:06 UTC ( [id://11110455]=note: print w/replies, xml )

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in reply to Re^2: unexpected modify hash in a distance with grep { $_ }
in thread unexpected modify hash in a distance with grep { $_ }

Nope, it happens because of the aliasing of the hash value inside grep, but I'm not sure how.

Interesting effect. I see your output with plain perl v5.22.2 (from 2016) on Linux x86-64 and with Strawberry v5.14.2 (from 2011) on Windows 64 bit. So this seems to be an old, unsolved problem.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

Comment on Re^3: unexpected modify hash in a distance with grep { $_ }

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Re^4: unexpected modify hash in a distance with grep { $_ } by leszekdubiel (Scribe) on Dec 20, 2019 at 21:14 UTC
Maybe I should file a bug on that? I will report bug for Debian...	[reply]
Re^5: unexpected modify hash in a distance with grep { $_ } by LanX (Saint) on Dec 20, 2019 at 21:42 UTC
I think yes, you can do this. But link to this thread. Me personally I'd wait the weekend, monks tend to find related tickets or route causes pretty fast. But that's a philosophical question, probably p5p rather prefers closing multiple reports. Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery FootballPerl is like chess, only without the dice}	[reply]

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