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Re: Re: Re: Flat File Database & GD::Graph (REVISITED)

by PrakashK (Pilgrim)
on Mar 18, 2002 at 14:59 UTC ( #152483=note: print w/replies, xml ) Need Help??


in reply to Re: Re: Flat File Database & GD::Graph (REVISITED)
in thread Flat File Database & GD::Graph (REVISITED)

GD::Graph module allows you to format your data without having to use quotes and commas. like so:
$graph->set( dclrs => [ qw(green pink blue cyan) ] );
It is not the feature of GD::Graph module that is letting you write code like this. It is the magic of the qw operator. Please see the Quote and Quote-like Operators section in perlop.

/prakash

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[Corion]: But people writing such code should document the objects they construct and why it makes sense for an object to be invisible as string while being true in a boolean context
[hippo]: That's equal parts clever and horrendous.
[Eily]: the overload version wouldn't return true with "$x" && !length $x though, I guess
[hippo]: The more I look at this code, the more $x is a plain old scalar and the more this condition will never be true. I'm calling it a bug at this point.
[hippo]: Thanks for your input which has soothed my sanity (a little)
[Corion]: Eily: Sure - if you force both things into stringy things, then you break that magic. But that would also mean that you changed the expression, as now $x = 0.00 will be true instead of false as it were before
[Corion]: Ah no, at least in my feeble experiments that doesn't change the meaning
[Corion]: We sell sanity in small packages ;)

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