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Re: Re: Re: getting 0 to print

by pfaut (Priest)
on Jan 13, 2003 at 21:40 UTC ( #226609=note: print w/replies, xml ) Need Help??

in reply to Re: Re: getting 0 to print
in thread getting 0 to print

You appear to be passing undefined values to your trim routine. If you want to substitute an empty string for undefined values, test with defined. if (!$_) is true for 0 and undefined values and your code was substituting an empty string for either. I think you only wanted the substitution for undefined values.

59 for(@out) { 60 #next if !($_); 61 if (!defined $_) { $_ = ""; } 62 s/^\s+//; 63 s/\s+$//; 64 s/\|//g; 65 s/\n//g; 66 s/\cM//g; 67 s/\r//g; 68 }
--- print map { my ($m)=1<<hex($_)&11?' ':''; $m.=substr('AHJPacehklnorstu',hex($_),1) } split //,'2fde0abe76c36c914586c';

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Re: Re: Re: Re: getting 0 to print
by rbc (Curate) on Jan 13, 2003 at 21:53 UTC
    Ah yes!
    if (!defined $_) { $_ = ""; }
    is most wise.
    Thank you O wise monk.

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[Lady_Aleena]: shmem, I already have the plugin installed, just not active.
[shmem]: if you have 1 optional argument, place that at the end of the list. If you have more, go for named parameters.
[Lady_Aleena]: 1 manditory, 2 optional.
[Discipulus]: my ($need,$opta,$optb ) = @_; .. if $opta..
[shmem]: all else leads to trouble, even if the third argument depends on the existence of the second. That may become brittle.
[Discipulus]: but if have case like subname(15,undef,3 ) maybe bettere named parameters
[Lady_Aleena]: I don't want to have to do: alpha_menu($hash, undef, $type);
[Lady_Aleena]: Or what Discipulus said.
[shmem]: Lady_Aleena: geany supports ctags.
[Discipulus]: a good compromise can be my ($need, $opts_ref) = @_ a scalar and an hash reference

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