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Re^2: Basic Coding Tips: Parsimonious Parameterization

by Aristotle (Chancellor)
on Jan 29, 2005 at 03:49 UTC ( #426178=note: print w/replies, xml ) Need Help??

in reply to Re: Basic Coding Tips: Parsimonious Parameterization
in thread Basic Coding Tips: Parsimonious Parameterization

There have been a number of Perl submissions there, though not as many as one might expect. Check out The Guy Who Invented Arrays for an example. I guess VB has captured the majority of the crop of casual programmers who are prone to pretzel logic, where ten years ago a much larger percentage of those would be using Perl.

Makeshifts last the longest.

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Re^3: Basic Coding Tips: Parsimonious Parameterization
by demerphq (Chancellor) on Jan 29, 2005 at 10:26 UTC

    First, thanks for the link, thats an interesting site. :-) But i have to quibble a little with this particular example. Obviously the code posted in that link appears hokey. Not using pack/substr or vec for the index string strikes me as a little odd for instance. But the overall strategy represented there is not IMO that crazy. Consider that if you have large numbers of strings such a strategy can greatly reduce the overhead of storing it in perl. Each SV in perl represents a certain amount of space, for the sake of the discussion lets say 20 bytes, versus the 2 - 8 required by a representationg akin to the one mentioned. So if we are storing large numbers of strings this overhead can be quite burdensome. Also, by using such an approach you can grab a large chunk of memory at a single go instead of doing a large number of small allocations. (Its interesting (if a little obvious) to consider that if you have 100k null terminated strings you are using 100k to simply store the end of string point :-)

    Anyway i didnt think such comments were worth posting on the site you linked to, but I do think its worth mentioning here.


      Oh, I know well enough. In the case of that example though, the coder did so many other hokey things at once that it doesn't seem particularly likely that this was well-reasoned conscious choice.

      Makeshifts last the longest.

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