you can achieve the desired result by combining two tr 

  DB<112> $_="alter"
 => "alter"

  DB<113> tr/this//cd                 # delete anything except t,h,i,s
 => 4

  DB<114> $_
 => "t"

  DB<115> tr/this/flip/                # translate
 => 1

  DB<116> $_
 => "f"

[download]

Cheers Rolf

( addicted to the Perl Programming Language)

In reply to Re: transliteration d flag not working as expected by LanX
in thread transliteration d flag not working as expected by SamCG

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