You forgot to specify the return value for map. It's currently returning the result of s/// (which is 1) since it's the last operation performed. 

my %testhash = map { my $val = (split /\//, $_)[-1];
                     (my $key = $val) =~ s/\.txt//; 
                     $key => $val                   # <-- added
                   }
               @teststr;

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In reply to Re: hash assignment using map with multiple statements by ikegami
in thread hash assignment using map with multiple statements by diomedea

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