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Re: Position

  • To: mathgroup at smc.vnet.net
  • Subject: [mg67676] Re: [mg67639] Position
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Tue, 4 Jul 2006 01:57:48 -0400 (EDT)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

Take a look at the command  StringPosition


Bob Hanlon

---- Bruce Colletti <vze269bv at verizon.net> wrote: 
> Let X be a list of strings having diverse lengths (some are the null string ""). 
> 
> What command returns the position in X of the first element that starts with "abcd"?
> 
> Presumably the command looks like Position[X,...,Heads->False], but my attempts have come up dry.  Although StringTake[Y,4]=="abcd" would seem to be part of the command, this fails when the string's length is less than 4.
> 
> Thankx.
> 
> Bruce


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