Re^4: Perl Golf idea


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Re^4: Perl Golf idea

by brx (Pilgrim)

on May 01, 2012 at 20:58 UTC ( [id://968333]=note: print w/replies, xml )

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in reply to Re^3: Perl Golf idea
in thread Perl Golf idea

And if you don't mind the (second) argument getting printed, another 3 chars less:
perl -nlE'sub w{[sort/./g]}$w||=w$_=pop;$w~~w&&say' ./dict.txt acert

This one is wrong (only) if the first line of 'dict.txt' contains a valid word (different from arg2).

example:

$ cat dict.txt 
one
neo
noe
bad
$ perl -nlE'sub w{[sort/./g]}$w||=w$_=pop;$w~~w&&say' ./dict.txt oen
oen
neo
noe
[download]

First word is missing. Anyway, this is a very beautiful version: ++

UPDATE: with an extra newline

perl -E'@a=sort pop=~/./g;say grep@a~~[sort/./g],<>' ./dict.txt acert

UPDATE2: one char useless

perl -E'@a=sort pop=~/./g;say grep@a~~[sort//g],<>' ./dict.txt acert

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Re^5: Perl Golf idea
by thundergnat (Deacon) on May 02, 2012 at 17:08 UTC

Nice. Here's one that returns the correct output using a few characters less:

perl -nE'$w//=pop;[sort$w=~/./g]~~[sort//g]&&print' ./dict.txt acert
[download]

or, two characters less than that, but with an extra newline between each word:

perl -nE'$w//=pop;[sort$w=~/./g]~~[sort//g]&&say' ./dict.txt acert
[download]

UPDATE: shorter version with correct output:

perl -nlE'$w//=pop;[sort$w=~/./g]~~[sort//g]&&say' ./dict.txt acert
[download]

or, same length, more efficient:

perl -nlE'($w//=[sort pop=~/./g])~~[sort//g]&&say' ./dict.txt acert
[download]

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