Hello all,
Is there a simple way to sum up a particular field of tiddlers that match a
filter and then display the result?
For instance, I have a tiddlywiki that I am trying to make into an
invoicing tool. The following tiddlercode is in the monthly invoice tiddler:
<table>
<tr>
<th>Date</th>
<th>Task Name</th>
<th>Hours</th>
</tr>
{{{[field:year[2014]field:month[06]sort[day]]||expandInvoice}}}
</table>
to build the invoice table (June 2014 in this instance) and the
'expandInvoice' tiddler is:
<tr>
<td>''{{!!year}}-{{!!month}}-{{!!day}}''</td>
<td>''{{!!name}}''</td>
<td align="right">''{{!!hours}}''</td>
</tr>
to build each row in the matched tiddlers.
What I would love to do would be to simply add up all the 'hours' fields of
each matched tiddler and display it in the invoice. I suspect it might take
a little embedded javascript script but my javascript-foo is weak, I'm
afraid. I also suspect that some conversion of text to number format would
have to take place since the tiddler fields don't seem to be a particular
type.
Could anyone point me to an example or share a code snippet that I could
borrow for my purposes?
Thanks,
/Mike
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