Re: Perl style question: loops with postcondition

For me Nr.1 (

do {
    ...
} while($condition)
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is the most (logical | easy to read) one. But I also like Nr.2
I don't like Nr.3 because I learned that goto: "It scans outward from your current location for the indicated label." (by larry wall) which decreases performance and just look weird (remembers me on basic and dos-batches...) to me...

giant

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Re: Re: Perl style question: loops with postcondition by RMGir (Prior) on Jun 28, 2002 at 12:19 UTC
giant said: I don't like Nr.3 because I learned that goto: "It scans outward from your current location for the indicated label." (by larry wall) which decreases performance and just look weird (remembers me on basic and dos-batches...) to me... I'll give you the basic and dos parts, but I'm fairly sure that "scans outward" would only apply if you're using the goto EXPR form, rather than a goto LABEL where the label is explicit. For the goto LABEL form, the location of LABEL has to be resolved at compile time, so it's probably not very costly. Check out Programming Perl, 3rd Edition, page 126. -- Mike	[reply]

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Re: Re: Perl style question: loops with postcondition
by RMGir (Prior) on Jun 28, 2002 at 12:19 UTC

giant

I don't like Nr.3 because I learned that goto: "It scans outward from your current location for the indicated label." (by larry wall) which decreases performance and just look weird (remembers me on basic and dos-batches...) to me...

I'll give you the basic and dos parts, but I'm fairly sure that "scans outward" would only apply if you're using the goto EXPR form, rather than a goto LABEL where the label is explicit.

For the goto LABEL form, the location of LABEL has to be resolved at compile time, so it's probably not very costly.

Check out Programming Perl, 3rd Edition, page 126.
--
Mike

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