Re: Convert list into function
- To: mathgroup at smc.vnet.net
- Subject: [mg41545] Re: Convert list into function
- From: Bill Rowe <listuser at earthlink.net>
- Date: Mon, 26 May 2003 05:46:24 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
On 5/24/03 at 1:05 AM, rajb at stanford.edu (rbhatnagar) wrote:
>A simple question: What is the correct way of converting a list into a
>function?
>For instance, lets say I have some list L = {1, 2, 3, 4}
>and I want a function such that FuncL[1] would return 1, FuncL[2]
>would return 2 and so on. So what is the syntax for FuncL?
>I need the function for some further manipulation in a situation in
>which simply using L[[1]] would not be appropriate.
The most obvious syntax (at least to me) is
FuncL[x_]:=L[[x]]
Perhaps somewhat better would be either
FuncL[x_, list_]:= list[[n]]
since this doesn't require a global definition of L to pre -exist. But this last is no different in effect than simply renaming the built in function Part, i.e.
Part[L,x] results in L[[x]]