Re: Pattern matching in lists
- To: mathgroup at smc.vnet.net
- Subject: [mg116118] Re: Pattern matching in lists
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Thu, 3 Feb 2011 05:26:06 -0500 (EST)
dataT = {1, 3, 2, 6, 5, 1, 4, 6, 3, 9};
dataF = {1, 3, 2, 6, 5, 1, 3, 6, 3, 9};
target = {1, 4, 6};
MemberQ[Partition[#, 3, 1], target] & /@
{dataT, dataF}
{True, False}
# /. {{s___, Sequence @@ target, f___} -> True,
{__} -> False} & /@ {dataT, dataF}
{True, False}
Bob Hanlon
---- "Harvey P. Dale" <hpd1 at nyu.edu> wrote:
=============
MemberQ easily tests whether a single integer appears in a list
of integers. Suppose, however, that I want to test not for a single
integer but for two or more consecutive integers, e.g., to see whether
{1,4,6} is a member of {1,3,2,6,5,1,4,6,3,9}. I can do this by
converting both lists into strings and then using string-matching
functions, but is there some way of doing it directly without that
conversion?
Thanks.