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MathGroup Archive 2005

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Re: about PATTERNS

  • To: mathgroup at smc.vnet.net
  • Subject: [mg53552] Re: [mg53548] about PATTERNS
  • From: DrBob <drbob at bigfoot.com>
  • Date: Tue, 18 Jan 2005 05:07:51 -0500 (EST)
  • References: <200501170324.WAA05950@smc.vnet.net>
  • Reply-to: drbob at bigfoot.com
  • Sender: owner-wri-mathgroup at wolfram.com

str="1223322176644667983323456554";
StringCases[str,a_~~b_~~b_~~c_/;(a != b != c)]
Select[%,MemberQ[%,StringReverse@#]&]

{1223,3221,7664,4667,8332,6554}
{1223,3221,7664,4667}

or

Intersection[StringCases[str,a_~~b_~~b_~~c_/;(aâ? bâ? c)],StringCases[\
StringReverse@str,a_~~b_~~b_~~c_/;(a != b != c)]]

{1223,3221,4667,7664}

or (better, I think):

StringCases[str,a_~~b_~~b_~~c_/;(a != b != c)]
Intersection[%,StringReverse/@%]

{1223,3221,7664,4667,8332,6554}
{1223,3221,4667,7664}

Bobby

On Sun, 16 Jan 2005 22:24:05 -0500 (EST), George peite <rasan1988 at hotmail.com> wrote:

> 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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-- 
DrBob at bigfoot.com
www.eclecticdreams.net


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