[Zope] HOW TO COUNT VARIABLE WITH <DTML-IN>

[Mike Doanh Tran]

Thank you very much, that works great!  I was messing with it in DTML
and it got kind of nasty.

Mike

On Monday 16 December 2002 04:04 pm, Tino Wildenhain wrote:
> Hi Mike,
>
> --On Montag, 16. Dezember 2002 15:32 -0700 Mike Doanh Tran
>
> <mtran@shufflemasterrd.com> wrote:
> > How do i count the value of a variable inside of <dtml-in>
> > I want to count not just the occurence of the  variable but the
> > value of that variable also. For Example i have a variable name "weight":
> >
> > <dtml-in getQuery>
> >   <dtml-var count-weight>
> > </dtml-in getQuery>
> >
> > <dtml-var count-weight> will give me a total number of occurence for the
> > variable weight.  What i want to do is count the value of weight.
> >
> > if weight=1 then count how many 1 there are
> > if weight=2 then count how many 2 there are
> > and so on ....
>
> While it is possible in DTML, I show you a solution with lesser pain:
> Add a python script and use a construct like that:
>
> weights={}
> for line in context.getQuery():
>     weights[line.weight]=weights.get(line.weight,0)+1
>
> return weights
>
>
> The script will start with an empty dictionary (hash, associative array)
> and for any value of weight, it looks up the current value with this
> kay in the dictionary, using 0 as default if none is found and adds 1
> to it. In the result you have a dictionary which maps each value
> for weight to the count of this value.
>
> HTH
> Tino Wildenhain
>
>
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-- 
Mike Doanh Tran
Shuffle Master Inc.
R&D Website:  http://internal.shufflemasterrd.com/