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Re: Data set association, returning values

  • To: mathgroup at smc.vnet.net
  • Subject: [mg131723] Re: Data set association, returning values
  • From: Bob Hanlon <hanlonr357 at gmail.com>
  • Date: Tue, 24 Sep 2013 04:15:34 -0400 (EDT)
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  • References: <20130924015750.0A2ED6A28@smc.vnet.net>

objects = "Object" <> # & /@
   CharacterRange["A", "T"]


values = "Page" <> ToString[#] & /@
   ReplacePart[
    RandomInteger[{1, 100}, Length[objects]],
    3 -> 67]


Some alternative approaches


Clear[value1, value2, value3];



value1[obj_?(MemberQ[objects, #] &)] :=
  value1[obj] =
   values[[Position[objects, obj][[1]]]][[1]];



value2[obj_?(MemberQ[objects, #] &)] :=
  value2[obj] =
   Cases[Thread[{objects, values}],
     {obj, val_} :> val][[1]];



(value3[#[[1]]] = #[[2]]) & /@
  Thread[{objects, values}];



#["ObjectC"] & /@
 {value1, value2, value3}


{"Page67", "Page67", "Page67"}



Equal @@ %


True



Neither value1, value2, nor value3 will evaluate for arguments not in
objects list


#["ObjectZ"] & /@
 {value1, value2, value3}


{value1["ObjectZ"], value2["ObjectZ"], value3["ObjectZ"]}



value1, value2, and value3 are equivalent


value1 /@ objects ==
 value2 /@ objects ==
 value3 /@ objects ==
 values


True



Bob Hanlon




On Mon, Sep 23, 2013 at 9:57 PM, Float <float71 at gmail.com> wrote:

> Hello all,
> I am a complete newbie to Mathematica, and I want to do the following:
>
> -Associate a data set of 20 objects to certain values.
> -Call the object and return its associated value.
>
> For example, I want to input "ObjectC" and have returned "Page67".
>
> How do I achieve this?
>
>




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