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Re: Perl semi-object without a constructor

by arnaud99 (Beadle)
on Feb 20, 2013 at 19:19 UTC ( #1019832=note: print w/replies, xml ) Need Help??


in reply to Perl semi-object without a constructor

Hi, it seems to me that in your first example, the connect method is part of a package that also defines a class. If this is the case then all methods within that package are being passed silently the object reference as the first parameter. This is why you only need 3 parameters to call the method. What is called $pkg here is usually called $self. I hope this helps.
  • Comment on Re: Perl semi-object without a constructor

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[Corion]: hippo: If you have a Unicode-wise Perl then likely some zero-width characters in $x would work. Maybe $x = "\x{200b}" works.
[Corion]: Hmm - no, that outputs 1 for me on 5.14 - perl -wle "my $x = qq(\x{200b}); warn $x; warn length $x"
[hippo]: Smart - I'll give that a go. Thanks.
[hippo]: Ah
[Corion]: But maybe there is some other Unicode string that will be true but have a zero width
[hippo]: For explanation, I've seen this construct in someone else's code (no names, no pack drill) and couldn't think of a situation to trigger it.
[Corion]: You'll have to look somewhere esoteric for that. Maybe some tied variable or special dualvar can also trigger that. But it's certainly not a common occurrence

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