From: "Jan E." <lists@...>
Date: 2012-05-02T21:26:51+09:00
Subject: Re: array of strings - finding letter combinations

Sebastjan H. wrote in post #1059226:
> Hi Jan,
>
> thank you so much for this. I went through the code and I think I
> understand most of it. I am only having hard time understanding the
> beginning:
>
>> str = 'abc&exyz'
>> str[/(?<=&)[a-z]/]
>
> What do these two lines define. I guess the second one is the regex,
> what about the first one. And moreover, how are these two related?


The first line simply defines a test string of the format you described 
in your first post (it contains the combination "&e"). The other 
characters are just gibberish to show that the substring is found 
inpedendent of the position or whatever.

The regex basically says: Look for a lowercase letter from a to z, which 
is preceeded by an ampersand. Using this regex in the "[]" method will 
return the first matching substring (or character in this case).

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