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Re: Stepping through a hash while modifiying its content

by Anonymous Monk
on Dec 28, 2012 at 05:02 UTC ( #1010618=note: print w/replies, xml ) Need Help??

in reply to Stepping through a hash while modifiying its content

# Access the hash, and do the deed including any hashkey, value deletions

You should replace that comment with some code :)

You could delay deletion :)

{ my @goners; while( my( $k, $v ) = each %hash ){ push @goners, $k; } delete @hash{ @goners }; undef @goners; }

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Re^2: Stepping through a hash while modifiying its content
by Gorgarian (Initiate) on Dec 28, 2012 at 12:19 UTC

    That is a good suggestion too -- I could run the code in blocks, saving up the deletions, and doing a clean-up after each 1M iterations, then restarting the while loop. I will see how much longer it takes to run after restricting myself to deleting only deleting the most recent iteration reference, and if it is a problem, move to your idea as a Plan B.

    Thanks for your help. Learning ... :)

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