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in reply to Re: Understanding the Schwartzian transform.
in thread Understanding the Schwartzian transform.

...and its associated size in bytes 
s/associated size in bytes/modification time/;

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Excellent. Thanks all for the help. Is this the canonical form of the Schwartzian Transform or a variant?

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Re^3: Understanding the Schwartzian transform.
by Laurent_R (Canon) on Jul 22, 2013 at 07:29 UTC

    Is this the canonical form of the Schwartzian Transform or a variant?

    Yes, it can be considered as the canonical form of the Schwartzian Transform. The original ST that appeared in a newsgroup more than 15 years ago might not have worked on fila age (I don't remember), but, definitely, the "output_array = map {block} sort {block} map {block} input array" is the canonical form of the Schwartzian Transform.

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      but, definitely, the "output_array = map {block} sort {block} map {block} input array" is the canonical for of the Schwartzian Transform.

      Sorry, that is like the generic form of Guttman-Rosler Transforms (see links) except without the secret ingredient :)(normalize/restore)

      Schwartzian is 

      my @sorted = map  { restore_from_cache    }
             sort { by_cached_expensive   }
             map  { store_cache_expensive } @original;

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[d/l]

        Sorry, but except that I did not detail what goes into the code blocks (as this has been detailed well enough the the previous posts), I do not see any difference between your version of the Schwartzian Transform and mine.

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