From: "Sebastjan H." <lists@...>
Date: 2012-05-02T15:26:24+09:00
Subject: Re: array of strings - finding letter combinations

Sebastjan H. wrote in post #1059172:

The way I am doing this manually (yes, it is a tedious job:) is that I 
compare the letters used with the alphabet (which could be defined as 
another array). That gives me the result of taken and free letters. Then 
I start the reassignment process.

regards,
seba

> Hi All,
>
> I am new to ruby and I want to learn by examples and here is one from my
> everyday work. I have an array of strings where each string contains a
> combination of an ampersand and a letter (&e). The trick is, this
> combination may only appear once in the whole array, so none of the
> other strings may contain the same combination.
>
> I need to solve this problem so that ruby would suggest a possible and
> not yet taken combination where duplicates occur. In case where no more
> possible combinations exist, an error would be raised.
>
> My question is: could someone give me some general pointers how would I
> achieve this (just enough to get me going:)
>
> Thank you kindly.
>
> regards
> seba

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