Re: Manually culling a list
- To: mathgroup at smc.vnet.net
- Subject: [mg115125] Re: Manually culling a list
- From: Armand Tamzarian <mike.honeychurch at gmail.com>
- Date: Sat, 1 Jan 2011 04:24:40 -0500 (EST)
- References: <ifhi9c$i2o$1@smc.vnet.net>
On Dec 30 2010, 8:10 pm, ntg <ntgl... at gmail.com> wrote:
> 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
I left a step out when I pasted my previous reply. I don;t have a copy
so I'll start from scratch.
list = {a, b, c,d,e,f}
newList = Rule @@@ Transpose[{Range[Length[list]], list}] (* left this
step out previously*)
CheckboxBar[Dynamic[x], newList]
make your selections then recover the parts you want from your list
using Part:
list[[x]]
(note that this will be an unsorted list because the parts are taken
in the order clicked)
Mike