Re: Define function using lists or tables

• To: mathgroup at smc.vnet.net
• Subject: [mg131421] Re: Define function using lists or tables
• From: Bob Hanlon <hanlonr357 at gmail.com>
• Date: Wed, 3 Jul 2013 22:02:42 -0400 (EDT)
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• References: <20130703085846.4E7676A7B@smc.vnet.net>

```data = Partition[CharacterRange["a", "z"], 2];

Clear[f]

Set[f[#[[1]]], #[[2]]] & /@ data;

?f

Bob Hanlon

On Wed, Jul 3, 2013 at 4:58 AM, Joaquim Nogueira <jen at fct.unl.pt> wrote:

> Hello. Possibly this is a very simple question.
>
> Is there a way to define a function over a (BIG) list of ordered pairs? I
> mean, suppose that I have a list, created using a Table command or
> something like that, of the form [{a,b},{c,d},etc.] such that, after naming
> it f, say, f = [{a,b},{c,d},etc.], then, afterwards, whenever there is a
> command such that one needs to compute f[a] (or f[c]), the program
> immediately replaces f[a] by b,and f[c] by d?
>
> Thank you.
>
>

```

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