Another version of regexps to play with. This version will pull out all matches at once when the global flag is used. So the filter could look like:
"[<currentTiddler>get[text]regexps[(?g)#\w+\b]tolower[]]" It might not make a difference in this use-case, but perhaps in some other situation. Notes: The inverse function (!regexps) still does whatever (!regexp) does. Regular expressions in javascript can return sub-groups for non-global expression searches. It might be possible to implement this in regexps, if someone can think of a good use-case. Mostly, instead of "removeprefix" and "removesuffix", you could grab whatever text you wanted from the middle of a tiddler title or filter stream. You could even make a single title (or field) split into multiple filter outputs. Once again -- what would be a use-case? Have fun, Mark On Wednesday, August 23, 2017 at 11:19:35 AM UTC-7, @TiddlyTweeter wrote: > > Over in another thread > <https://groups.google.com/forum/#!topic/tiddlywiki/4hE3-KUOqkY> I > finally got to understand filters better. And, thanks to Mark S., achieved > what I needed to do. > > HOWEVER. > > I feel slightly diminished. I am crap with computers. But one thing I know > well is Regular Expressions. I was surprised at the very complex loops that > i had to go through to CHANGE stuff in the way I needed to in that thread. > > Let me give an example ... > > <$set name=test filter=" > [list[!!text]prefix[#]] > [list[!!text]prefix[#]removesuffix['s]] +[!suffix['s]] > [list[!!text]prefix[#]removesuffix[.]] +[!suffix[.]] > [list[!!text]prefix[#]removesuffix[...]] +[!suffix[...]] > [list[!!text]prefix[#]removesuffix[,]] +[!suffix[,]] > [list[!!text]prefix[#]removesuffix[;]] +[!suffix[;]] > [list[!!text]prefix[#]removesuffix[:]] +[!suffix[:]] > [list[!!text]prefix[#]removesuffix[!]] +[!suffix[!]] > [list[!!text]prefix[#]removesuffix[?]] +[!suffix[?]] > [list[!!text]prefix[#]removesuffix[--]] +[!suffix[--]] > [list[!!text]prefix[...#]removeprefix[...]] +[!prefix[...]] > [list[!!text]prefix[--#]removeprefix[--]] +[!prefix[--]] > "> > > Here is sample data this deals with ... > > left alone - #buddha #buddha #buddha > remove apostrophised ending - #BuddHA's > remove fullstop - #buddha. > remove comma - #buddha, > remove semicolon - #buddha; > remove colon - #buddha: > remove exclamation mark - #buddha! > remove question mark - #buddha? > remove 2 trailing dashes - #buddha-- > remove 3 trailing stops - #BUDDHA... > remove 2 leading dashes - --#Buddha > remove 3 leading stops - ...#Buddha > left alone - #notBuddha > #BuddhaDANGER" (NOT YET DEALT WITH) > left alone #karma > > > In JavaScript Regular Expressions ALL these cases, and more---discarding > the cruft of punctuation that all that code in the first box has to deal > with---would be matched by simply: *"#\w+\b"*. Nothing more would be > needed. > > If you could just transfer the match you would not have any of that > prefix/suffix malarky to cope with. > > WHY is it SO difficult in TW to do that? > > It seems nuts. > > I am aware there is a regexp operator, but can it RETURN its exact match > for processing, or is it what it looks like: a match with something IN a > field it adds to a list to display but then the match itself is discarded? > > All of this is as long way of saying two things ... > > (1) Regular Expressions (BOTH match & replace) are natural TW allies > > (2) I don't understand why we don't have a more friendly relationship with > them. > > Please ask if anything is unclear. > > Best wishes > Josiah > -- 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/7b3a2c3b-1459-42e7-863c-faeb024b9809%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
$__core_modules_filters_regexps.js(1).json
Description: application/json
