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Re^2: Hash of arrays

by perlloz (Initiate)
on Dec 28, 2012 at 10:20 UTC ( #1010683=note: print w/replies, xml ) Need Help??

in reply to Re: Hash of arrays
in thread Hash of arrays

Thanks, I was using %newgrouphash = undefined; to declare my hash instead of %newgrouphash = (); That is where the extra key was coming from. forever learning - thanks for the help

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Re^3: Hash of arrays
by NetWallah (Canon) on Dec 28, 2012 at 18:54 UTC
    If you had
    use strict; use warnings;
    at the top of your code, it would have pointed out your problem, with the message:
    Use of uninitialized value in list assignment at ..
    (This comes from 'use warnings;')

    There is overwhelming agreement here that those two directives should be at the top of EVERY script you write, and you have just experienced an instance where it could have saved days of questioning and struggle.

                 "By three methods we may learn wisdom: First, by reflection, which is noblest; Second, by imitation, which is easiest; and third by experience, which is the bitterest."           -Confucius

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