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Re: Replacing Numbers in a List

  • To: mathgroup at smc.vnet.net
  • Subject: [mg68271] Re: Replacing Numbers in a List
  • From: jesse.woodroffe at gmail.com
  • Date: Mon, 31 Jul 2006 03:45:38 -0400 (EDT)
  • References: <eahsgh$op1$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Well, to do it without any looping, you might try

x /. xelem_?(MemberQ[y, #1] &) -> 222

jw

Gregory Lypny wrote:
> Hello everyone,
>
> I have a long list of integers called x, and I want to replace those
> that are members of list y with the number 222.
>
> I did it this way with a Do loop.
>
> y = {122, 211, 212, 221, 223, 232, 322};
> Do[x = ReplacePart[x,222, Position[x, y[[i]]]],{i, Length@y} ]
>
> Is this OK, or is there a more direct way?
> 
> Regards,
> 
> 	Gregory


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