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MathGroup Archive 2001

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Re: Meaning of @ ... not @@

  • To: mathgroup at smc.vnet.net
  • Subject: [mg32165] Re: Meaning of @ ... not @@
  • From: "Allan Hayes" <hay at haystack.demon.co.uk>
  • Date: Mon, 31 Dec 2001 02:24:23 -0500 (EST)
  • References: <a0liaj$62e$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Mark,

You can look up @  and @@ in the HelpBrowser.

Otherwise we have


    HoldForm[FullForm[a@b]]

        a[b]

    HoldForm[FullForm[a@@b]]

        Apply[a,b]


Note also,

    HoldForm[FullForm[a@@@b]]

        Apply[a,b,List[1]]



--
Allan

---------------------
Allan Hayes
Mathematica Training and Consulting
Leicester UK
www.haystack.demon.co.uk
hay at haystack.demon.co.uk
Voice: +44 (0)116 271 4198
Fax: +44 (0)870 164 0565


"DIAMOND Mark R." <dot at dot.dot> wrote in message
news:a0liaj$62e$1 at smc.vnet.net...
> I'm sure I've seen this before, but cannot find the answer on the archive
> because I can't think of a sensible way of limiting the search!
>
> What, please, is the meaning of @ as in
> Conjugate @ Reverse @ Drop[list, -1]
>
> I seem to remember reading that this was "undocumented", and I cannot find
> it in the help. The above line appears in mg1432 in the archive.
>
> --
> Mark R. Diamond
> Send email to  server called psy dot uwa dot edu dot au and address to
markd
> http://www.psy.uwa.edu.au/user/markd
>
>
>




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