Thanks to everyone for the help. The analogous of list comprehension is exactly what I I was looking for and I had missed the $fieldmangler widget plays. Things are slowly starting to become clearer...
Cheers, S. On Sun, Feb 17, 2019 at 4:07 PM Jed Carty <[email protected]> wrote: > As an explanation of what is going on (node the added button, this doesn't do > anything with the button): > > > <$button> > > Add tags > > <$list filter=<<SomeFilterHere>>> > <$fieldmangler> > <$action-sendmessage $message="tm-add-tag" $param=<<__newTag__>> /> > </$fieldmangler> > </$list> > > </$button> > > > The list widget makes a list, one way to think about it is as iterating over > a loop, but if you are familiar with some programming it is more accurately > list comprehension similar to python (I think also erlang and haskell, it has > been a while. Many other languages probably use the same concept). > > > So a possibly way too detailed description of the list widget: > > > The filter creates a list of titles > > The template between the opening and closing tags for the $list widget is > applied to each title returned by the filter > > The results are output in the same order as the titles in the list > > > The $fieldmangler widget is magic, it is mostly left over from a previous > version of how we thought tiddlywiki was going to work. Mostly it lets you > add tags without overwriting the tags field. This is the only time when it is > required or that there isn't a simpler way to do it. The magic is that it > lets you edit fields, but that was before the action widgets became the main > tool for changing tiddlers so it is less useful now. > > > The $action-sendmessage widget is a way that the older message-based changes > to the wiki are used with the newer action widgets. It was a more > conceptually complex system, I suggest that you just accept the magic for now > and come back to that part later. Just treat the combination of $fieldmangler > and $action-setfield widgets in this context like an action widget that lets > you add a tag to a tiddler. > > > Then, if you wrap that whole thing in a button, the result is a button that > activates a list of action widgets, each action widget adds a tag to one > tiddler. > > > Hopefully that is understandable and not too rambling. > > -- > 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 https://groups.google.com/group/tiddlywiki. > To view this discussion on the web visit > https://groups.google.com/d/msgid/tiddlywiki/9bcadc92-45fe-453f-87fc-ba7eb903c378%40googlegroups.com > <https://groups.google.com/d/msgid/tiddlywiki/9bcadc92-45fe-453f-87fc-ba7eb903c378%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- __________________________________________________ Stefano Franchi [email protected] <[email protected]> http://stefano.cleinias.org -- 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 https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/CAJODLwYQ7s8_OTHsV6CD33qMZ5taQcu9PA%3DSauNkNT1bPxi6OQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
