Re: Help with Hold
- To: mathgroup at smc.vnet.net
- Subject: [mg101030] Re: [mg100917] Help with Hold
- From: Yuri Kandrashkin <spinalgebra at gmail.com>
- Date: Sun, 21 Jun 2009 07:06:56 -0400 (EDT)
- References: <200906180852.EAA19966@smc.vnet.net>
Hi,
If I understood your question correctly
here is another solution:
expr = Hold[x, Null, y, Null, Null]
ls = List @@ (ToString /@ Unevaluated /@ expr) /. "Null" -> Null
ls // InputForm
2009/6/18 Erich Neuwirth <erich.neuwirth at univie.ac.at>:
> How can I transform
> Hold[x,Null,y,Null,Null]
> into
> {"x",Null,"y",Null,Null}
> even if x and/or y have assigned values?
>
>
--
Sincerely,
Yuri Kandrashkin
- References:
- Help with Hold
- From: Erich Neuwirth <erich.neuwirth@univie.ac.at>
- Help with Hold