Hi Erwan, > Steve I think that your use case is interesting because it shows a > limitation of sorting with TW filters (although imho in this specific case > the best solution would be to sort the list of tags automatically every > time a tag is added to a tiddler). >
I think TiddlyWiki should *never* sort a list-field when adding or removing an item, unless specifically instructed to do so via something like Matabele's listops, the tags field being just a special case of a generic list-field. > I think another case with the same limitation is when one wants to sort a > list of tiddlers by the number of times they are used as tags (i.e. number > of tiddlers tagged with them). > ... > I wonder if it would be possible to implement new "sort" filter operators > which would allow the usage of a sub-filter like this > This sounds to me that -- for the purposes of sorting -- we wish for something like a "virtual field", by which we can sort after we've created it "in-memory". A *sortby* filter could "sort by the output of filter expression evaluated against an item". This filter expression could be passed to the operand as either a variable or text reference as we'd have no other way to chuck a "subfilter" within a filter expression, e.g. <$vars sortfilter="[<currentTiddler>tagging[]]"> <<list-links filter:"[all[]sortby<sortfilter>]">> </$vars> 'The above should cater for the OP's requirement, assuming the *sortby* filter would: 1. evaluate each item in the input set against the specified filter in the operand 2. sort the items in the input set with respect to whatever was returned It could / perhaps should even be... <<list-links filter:"[all[]sortby:nsort<sortfilter>]">> ...to avail any core sorting algorithms. The count would be: <$vars sortfilter="[<currentTiddler>tagging[]count[]]"> <<list-links filter:"[all[]sortby<sortfilter>]">> </$vars> ...requiring, well, a nonexisting "count" filter. Best wishes, Tobias. -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywiki@googlegroups.com. Visit this group at http://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/0fd70eb7-1315-4e10-aff7-37ba9bd6af23%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
