This is what I wanted to do myself in the first place. Only that... I plainly didn't remember about the /c switch! And I tried with the /d one (without assignment, that is) but it failed like this: 
Can't modify bitwise xor (^) in transliteration (tr///) at foo.pl line
+ 7, near "tr/\0//d) "

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So I adopted a temp variable. Incidentally I wonder why I don't get the same error if I omit /d (with or without /c)... in both cases I'm attempting at modifying it, am I not?

In reply to Re^2: Tell whether two strings differ at only one position by blazar
in thread Tell whether two strings differ at only one position by rg0now

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