Hi I have published my efforts to Github via a pull request to the Master repo: https://github.com/Jermolene/TiddlyWiki5/pull/2037
We can now continue our discussion over there and, I hope, polish up the code :-) Some help with documentation would be welcomed (anybody?) -- not my strongpoint. I have written some documentation to explain the basics, which I have made available here <http://listops.tiddlyspot.com/>. regards On Saturday, 17 October 2015 17:11:53 UTC+2, Tobias Beer wrote: > > Hi Metabele, > > >> I have not managed to track down where in the core uniqueness gets >> imposed. As Jed points out, the StingifyList function is one place, but >> there appear to be others. An index in a data dictionary can be filled with >> multiple item values, however, when operations are carried out on that >> list, some operations impose uniqueness whilst others do not. >> > > It's mostly in the tag handling... which is independent of any new > list-handling capacities, possibly overlapping in capabilities / codebase. > Nothing forces new code to make use of stringifyList. In fact, I just > realized that being to quick about it means trouble. > For example, using the filter parameter with the list widget returnes > what? A stringified list!! Well, what if I do *limit[1]* hoping to get > just a title, I won't. > So, I made a pull request that remedies the situation where I do not want > any stringifyList of the filter output, but a plain string instead: > > *#2035 parameter "format" for set widget * > https://github.com/Jermolene/TiddlyWiki5/pull/2035 > > >> My widgets do not impose uniqueness, other than when core functions are >> implicitly or explicitly called which do so. However, I have made little >> effort to handle multiple instances of a value -- my filters will always >> use the first instance of an item as the marker. >> > > Obviously this is necessary so long as one cannot more specific about it, > perhaps referencing a numerical index at that point rather than a named > element. > > Once the core has been modified to correctly handle multiple instances of >> the same item, filters can be modified or new filters written to handle the >> new usage cases. >> > > I'm not exactly sure which filters are greedy this way or which allow > duplicates. > A quick test has me think filters always return a SET of tiddlers, never a > list (allowing duplicates), e.g try: > > {{{ foo foo foo }}} > > Now this means that we are practically barred from using filters whenever > we want to do list management that does allow duplicates. > It makes sense under the assumption that filters act on tiddler titles, > but what about those that don't? > > Currently, I believe that list management (even in its current form) >> should be brought into operation as soon as possible. This will enable most >> usage cases for user lists, and experience will be gained in the handling >> of lists before finalising their management. >> > > Surely, automating stuff via lists is one thing that makes all the power > of TiddlyWiki. > The more capabilities we get there, the easier things will be and > the broader the general spectrum of things that can be done. > > I have written a couple of new filters to further extend what is possible >> with list management -- a couple more are necessary (especially a >> 'sortby[]' filter -- that is: sort a list of items in the order of another >> list.) I have also added an '$index=' attribute to the ActionListops widget >> to enable manipulation of data dictionary indexes (and modified a couple of >> my filters to work with them.) >> > > Fantastic, looking forward to seeing that in action. > Perhaps, at some point, I don't know if you do, but if you get to push > that to some GitHub repo, it would be easier to communicate around the code. > > Best wishes, > > — tb > -- 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 [email protected]. To post to this group, send email to [email protected]. 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/7f9f6144-ae8b-481a-8674-5cf4167a3c99%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
