Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2004
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2004

[Date Index] [Thread Index] [Author Index]

Search the Archive

Question on pattern matching

  • To: mathgroup at smc.vnet.net
  • Subject: [mg47765] Question on pattern matching
  • From: "Roman Green" <rgreen at mail.ru>
  • Date: Mon, 26 Apr 2004 02:40:58 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

I am a very newbie in Mathematica so sorry for possibly stupid question.

In the following Mathematica's output
In[1]:= SetAttributes[k, Orderless]
In[2]:= k[a, b, b] /. k[x_, x_, y_] -> 0
Out[2]= 0
In[3]:= k[a, b, b] /. k_[x_, x_, y_] -> 0
Out[3]= k[a, b, b]

I can't understand why Mathematica can find match when applying pattern 
k[x_, x_, y_], but is unable with more general pattern k_[x_, x_, y_].

Thanks in advance.

---

R. Green



  • Prev by Date: Re: Modulus ? How TO
  • Next by Date: Re: Modulus ? How TO
  • Previous by thread: Re: Parametric Plot.
  • Next by thread: Re: Question on pattern matching