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Re: about PATTERNS

  • To: mathgroup at smc.vnet.net
  • Subject: [mg53564] Re: about PATTERNS
  • From: "Steve Luttrell" <steve_usenet at _removemefirst_luttrell.org.uk>
  • Date: Tue, 18 Jan 2005 05:08:05 -0500 (EST)
  • References: <csfffb$6gn$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

This will do what you want:

str = "1223322176644667983323456554";
s1=StringCases[str, a_ ~~ b_ ~~ b_ ~~ c_ /; a != b != c];
s2=Map[StringReverse,s1];
Intersection[s1,s2]

Steve Luttrell

"George peite" <rasan1988 at hotmail.com> wrote in message 
news:csfffb$6gn$1 at smc.vnet.net...
> In[1]:= str = "1223322176644667983323456554";
>
> In[2]:= StringCases[str, a_ ~~ b_ ~~ b_ ~~ c_ /; a != b != c]
>
> Out[2]= {1223, 3221, 7664, 4667, 8332, 6554}
>
>  the above code will extract the pattern  abbc  from the above string, but
> how i could put a rule to just display the substrings wich match this
> pattern and also have an inverted form in the main string so the output 
> will
> give the following:
>
> Out[2]= {1223, 3221, 7664, 4667}
>
> thanks
> George peite
>
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