Re: Finds strings in a list that begin with "A"
- To: mathgroup at smc.vnet.net
- Subject: [mg82333] Re: Finds strings in a list that begin with "A"
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Thu, 18 Oct 2007 04:43:52 -0400 (EDT)
- Organization: The Open University, Milton Keynes, UK
- References: <ff4egn$d6p$1@smc.vnet.net>
tomfabtastic at hotmail.com wrote:
> I am trying to look through a list of strings and return all strings
> that start with an "A".
>
> For example, my list could be :
>
> {"And", "Bat", "Artistic", "Cob"} so I want to return {"And",
> "Artistic"}.
>
> Any ideas ?
One possible way of doing this is as follows. *StringCases* is applied
in turn to each element of the list thanks to *Map* (shortcut /@) and
check whether the current string start with a capital A followed by at
least one more character (use triple dashes ___ if you want zero, one,
or more characters). Also, you should look at the online documentation
about *StringExpression* to get an overall idea of the possibilities.
In[1]:= lst = {"And", "Bat", "Artistic", "Cob"};
In[2]:= StringCases[#, "A" ~~ __] & /@ lst // Flatten
Out[2]= {"And", "Artistic"}
Regards,
--
Jean-Marc