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Re: Default Hash Key

by wade (Pilgrim)
on May 02, 2008 at 00:32 UTC ( #684060=note: print w/replies, xml ) Need Help??

in reply to Default Hash Key

You could always do something like:
my $foo = exists($description{$input}) ? $description{$input} : "default value";
Or the two-step approach:
my $foo = $description{$input}; $foo = "default value" if (!defined($foo));

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Re^2: Default Hash Key
by Anonymous Monk on Mar 13, 2012 at 13:44 UTC

    Using the "//" operator, this folds into:

    my $foo = $description{$input} // "default value";

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[choroba]: they
[LanX]: why do you think it's more than one person?
[Your Mother]: Because we are LEGION! Fix YOUR SIG SIG BLOCK!!!!
[Your Mother]: Forgot to sign in as my sockpuppet, how embarrassing!
[1nickt]: pryrt I am creating a Type to check valid user IDs, which must be a whole number greater than or equal to zero. I would like to disallow 1.0 but because of this behaviour, by the time it is checked by the constraint, it *is* an Int.
[LanX]: should this be considered? Re: Parsing .txt into arrays
[LanX]: and this Re^4: Hash user input
[pryrt]: LanX, I would vote "keep" if it were considered: it's not helpful, but it could be taken multiple ways, not all of which are offenseive...
[pryrt]: 1nickt: if you are checking for valid user IDs, then I wouldn't care about the difference between 1.0 and 1: I would take either as a valid representation of the integer user ID#1
[LanX]: and this Re^2: extract column data

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