Re: Schwartzian Transform

[Russ Allbery]

Uri Guttman <[EMAIL PROTECTED]> writes:
>>>>>> "SC" == Simon Cozens <[EMAIL PROTECTED]> writes:

>   SC> No, it wouldn't, don't be silly. The ST can always be generalized to 

>   SC> ST(data, func, compare) =
>   SC> map { $_->[0] } sort { compare($a->[1], $b->[1]) } map { [$_, f($_)] } data

> and i don't see multiple keys or sort order selection per key.

Then you need to look at f and compare a little closer, since it's in
there.

> and even creating a function to extract the key is not for beginners in
> many case.

Without creating a function to extract the key, you can't sort in Perl at
all.  sort { $a <=> $b } contains two functions to extract the keys.

Functions don't have to be complicated, you know.

-- 
Russ Allbery ([EMAIL PROTECTED])             <http://www.eyrie.org/~eagle/>