If $s or $t can contain \n, you need a /s on both matches. But your $_[0] can be replaced with pop.

That makes your solution turn into the 36 character: 

sub t_in_s {
($t=pop)=~s/./\Q$&\E.*/gs;pop=~/$t/s
}

[download]
or 38 if you wish to add my to make it strict compliant.

In reply to Re (tilly) 2: Golf: Embedded In Order by tilly
in thread Golf: Embedded In Order by Masem

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