From: "Jan E." <lists@...>
Date: 2012-05-03T04:59:34+09:00
Subject: Re: array of strings - finding letter combinations

Sebastjan H. wrote in post #1059285:
> Ok, thx. Just so I understand correctly, these two lines are just
> examples and are not part of the actual code. Since the array of strings
> to be searched in is actually strings in the code below. Right?

Yes.



> Furthermore, when I used the regex as you put it, I got this error:
>> duplicates.rb:5: undefined (?...) sequence: /(?<=&)[a-z]/
>
> So I changed it to /&[a-z]/ and the error was gone.

Yes, but this regex will include the ampersand. To get the actual 
letter, you have to write something like str[/&[a-z]/][1].

Anyway, you should definitely update your Ruby, if possible. Version 1.8 
is more or less dead.



> I also putsed the used_chars and duplicates to check it and it's not
> clear to me why the puts duplicates returns: a 3. Is 3 the index?

Yes, but you might as well save the actual strings in the array.

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