Re: and a type of regular expression
- To: mathgroup at smc.vnet.net
- Subject: [mg109650] Re: and a type of regular expression
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Mon, 10 May 2010 06:38:34 -0400 (EDT)
On 5/9/10 at 7:51 AM, nycstern at gmail.com (Michael Stern) wrote:
>Is there an elegant way to do dictionary searches that match
>specified kinds of character repetition? For example, to search for
>six letter words that start with "d" and end with "k", where the
>third and fourth letter are the same?
>Finding six letter words that start with "d" and end with "k" is
>easy --
>DictionaryLookup[{"English", RegularExpression["d....k"]}]
>But how do we restrict the answer to words where the third and
>fourth letters are the same?
In[2]:= Cases[
DictionaryLookup[{"English",
RegularExpression[
"d....k"]}], _?(SameQ @@ (Characters[#][[{3, 4}]]) &)]
Out[2]= {dybbuk}