I don't think this is the best way to solve the problem but, instead of ternaries, I thought I'd have a go with regex conditionals. It also uses an on-the-fly subroutine method suggested by almut a couple of months ago here.

use strict;
use warnings;

my $str = q{a,b=c,e=#f,ghi};

my @result =
   map
   {
       my $res;
       m
       {(?x)
          ^
          (?(?=([a-z])$)
             (?{(sub {($res) = @_})->(qq{$1=>fn($1)})})
             |
             (?(?=([a-z])=([a-z])$)
                (?{(sub {($res) = @_})->(qq{$2=>$3})})
                |
                (?(?=([a-z])=\#([a-z])$)
                   (?{(sub {($res) = @_})->(qq{$4=>fn($5)})})
                   |
                   (?{(sub {($res) = @_})->(q{???})})
                )
             )
          )
       };
       $res
   }
   split m{,}, $str;

print qq{@result\n};

[download]

It prints

a=>fn(a) b=>c e=>fn(f) ???

[download]

I hope this is of interest.

Cheers,

JohnGG

In reply to Re: map a list by johngg
in thread map a list by evil_otto

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