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MathGroup Archive 1999

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Re: ReplaceAll in If Statement

  • To: mathgroup at smc.vnet.net
  • Subject: [mg19470] Re: [mg19448] ReplaceAll in If Statement
  • From: "Carl K.Woll" <carlw at fermi.phys.washington.edu>
  • Date: Sat, 28 Aug 1999 15:53:02 -0400
  • Organization: Department of Physics
  • References: <199908250525.BAA24791@smc.vnet.net.>
  • Sender: owner-wri-mathgroup at wolfram.com

Tom,

Your definition of opList should not have the braces. Try

opList=a->True;

instead.

Carl Woll
Dept of Physics
U of Washington

Tom Compton wrote:

> In the following sequence I expected z to evaluate to 1 in the
> Module.  It appears that the test in the module does not
> evaluate to either True or False.  I don't understand why.
> Can anyone explain?
>
> In[1]:=
> opList={a->True};
>
> In[2]:=
> test[opts___]:=Module[{},
> If[a /. {opts}, z=1, z=2, z=3];
> {a, z} /. {opts}]
>
> In[3]:=
> test[opList]
> Out[3]=
> {{True,3}}
>
> Tom Compton



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