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MathGroup Archive 2005

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Re: Zero argument functions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg61727] Re: Zero argument functions
  • From: Bill Rowe <readnewsciv at earthlink.net>
  • Date: Thu, 27 Oct 2005 05:02:03 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

On 10/26/05 at 1:01 AM, kalymereau at yahoo.fr wrote:

>For a "function" with no argument, what is the difference between:

>myFunc:=(whatever)

>and

>myFunc[]:=(whatever)

>I find the first syntax simpler, but there are many built-in
>Mathematica functions that use the second one.

Well for one thing they have different heads, i.e.,

In[1]:=f[] := x^2; 
       g := x^2; 
       Head /@ {f, g}

Out[3]={Symbol, Power}

But,

In[4]:=f[] == g

Out[4]=True

So, it isn't obvious the difference will matter in actual usage
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