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Re: Manually culling a list

  • To: mathgroup at smc.vnet.net
  • Subject: [mg115130] Re: Manually culling a list
  • From: Guido Tripaldi <guido at gtripaldi.it>
  • Date: Sat, 1 Jan 2011 04:25:43 -0500 (EST)

Hi Tom,
see if you like this way.
cheers,
   G

(* define our cull function *)
cullList[items_] :== Module[
  {flags },
 
  (* setup a flags array and reset its values *) 
  flags == Table[False, {Length[items]}];
 
  (* Show up a dialog window, so our function will wait for button before exiting *)
  DialogInput[
  
   (* some cosmetic *)
   Column[{
     Text[Style["Make you choice:", Bold, Medium]],
    
     (* every checkbox/item will have its own indipendent flag, indexed by the item sequence *)
     Grid[MapIndexed[{Checkbox[Dynamic[flags[[First[#2]]]]], #1} &, items]],
    
     (* return the appropriate list of values *)
     Row[{
       (* full list of values and items *)      
       Button["Full Cull", DialogReturn[MapThread[List, {flags, items}]]],
       (* just the checked items *)      
       Button["Cull Checked", DialogReturn[Pick[items, flags, True]]],
       (* just the unchecked items *)      
       Button["Cull Unchecked", DialogReturn[Pick[items, flags, False]]]
       }] (* /Row *)
     }] (* /Column *)
   ](* /DialogInput *)
  ](* /Module *)



(* call our function *)
culled == cullList[{"Mikey", "Goofy", "Pluto", "Donald"}]

Out[309]== {{False, "Mikey"}, {True, "Goofy"}, {False, "Pluto"}, {True, "Donald"}}


Il giorno 30/dic/2010, alle ore 10.10, ntg ha scritto:

> Hello guys,
>
> Suppose I have a longish list of items that I want to manually cull.
> It seems I should be able to do something like
>
> checkList == ({Checkbox[], #)& /@ list
>
> Then, I could write
>
> instanceOfCheckList == checkList
>
> check away, and hopefully see something like
>
> {{True, item1}, {False, item2}, ...}
>
> which I could manipulate. But all I see is the the list of "checked"
> checkboxs and items, not the consequence of checking the boxes. I can
> do a FullForm on instanceOfCheckList and extract what I need via list
> surgery-- but that is inelegant. I'm sure there is some magic
> incantation involving Evaluate or Interpretation or Dynamic. Can you
> help?
>
> Thanks,
> Tom
>

---
Guido Tripaldi






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