Re^3: Perl one-liner to remove duplicate entries from PATH

[demerphq]

my %path;
$path{$_}=$path{$_} || 1 + keys %path for split /$sep/,$path;

there are other more efficient ways to do that btw, im just feeling moderately cheeky. ;-)

And for the curious you cant write that as ||= because of a bug in Perl (on some versions of Perl anyway).

Update:

Or maybe its not a bug. According to some the docs should be read to say that it should be valid to say

my %path;
$path{$_}||=keys %path for split /$sep/,$path;

and some are saying that the results are undefined. sigh