Re^2: Data::Table - empty values


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Re^2: Data::Table - empty values - avoid warnings

by GertMT (Hermit)

on Oct 24, 2007 at 20:23 UTC ( [id://647003]=note: print w/replies, xml )

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in reply to Re: Data::Table - empty values - avoid warnings
in thread Data::Table - empty values - avoid warnings

thanks for your reply. I'm a bit puzzled with the regex.

      ((defined($_->[0]) && $_->[0] =~ m/^\d+$/) ? $_->[0] : 0)
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Am I correct if I assume that here $_ is defined as 'one single digit or maybe a few digits (d+, no spaces and stuff like that in between the digits) and then if this is not the case it should be a 0 (zero)? Never used this ternary operator and just want to make sure that's what it is.
thanks

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Re^3: Data::Table - empty values - avoid warnings by Anonymous Monk on Oct 25, 2007 at 05:31 UTC
Am I correct if I assume that here $_ is defined as 'one single digit or maybe a few digits ... No, `$_` is array reference not a scalar. `$_` is not being tested for simple number-ness, but the deferenced value, `$_->[0]`, is. Other than that, you are correct in your reading about which value is eventually going to be added. - parv	[reply] [d/l] [select]
Re^4: Data::Table - empty values - avoid warnings by Anonymous Monk on Oct 25, 2007 at 05:39 UTC
Oh, but a array reference is a scalar, if only a special type of it. No, $_ is array reference not a scalar. That was rather thoughtless of me. First sentence should have been: "No, `$_` is array reference (not a simple value)." -parv	[reply] [d/l]

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