Re: pattern example
- To: mathgroup at smc.vnet.net
- Subject: [mg119824] Re: pattern example
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Fri, 24 Jun 2011 07:45:48 -0400 (EDT)
On 6/23/11 at 7:25 AM, fgutiers2002 at yahoo.com (Francisco Gutierrez)
wrote:
>I find in Leonid's (Shiffrin) excellent book the following example
>(p. 122): f[3/5,4,5,2/3]/.f[x:(_Integer|_Rational)..]:>{x}
>According to the book, this returns {3/5,4,5,2/3}
>However, I get (Mathematica 8.0.1, Windows 7) f[3/5,4,5,2/3]
>What's wrong? Francisco
Perhaps it is platform dependent since I see:
In[1]:= f[3/5, 4, 5, 2/3] /. f[x : (_Integer | _Rational) ..] :> {x}
Out[1]= {3/5, 4, 5, 2/3}
In[2]:= $Version
Out[2]= 8.0 for Mac OS X x86 (64-bit) (February 23, 2011)
But isn't it simpler to use the functional construct?
In[3]:= List @@ f[3/5, 4, 5, 2/3]
Out[3]= {3/5, 4, 5, 2/3}