Hi all, In a discussion earlier today ( https://groups.google.com/forum/#!topic/tiddlywiki/M8PFeakbp6U), there was a "problem" caused by the use of [removeprefix[...]]. The OP had assumed that this just removed the specified leading text from the items being filtered when, in fact, it also does the matching action of [prefix[...]]
However, it would be helpful if there was a filter actually did *just* remove leading (or trailing) text, without regard to any matching. One example of a filter that does this kind of non-matching action is "[trim[]]" (introduced in 5.1.20), which removes leading/trailing *whitespace* from the input items, but doesn't have any effect on items that don't have leading/trailing whitespace. Thus, a filter containing this: [[ foobar ]] [[mumble]] [[gronk snork ]] [[ frotz]] +[trim[]] becomes just [[foobar]] [[mumble]] [[gronk snork]] [[frotz]] My thought is this... we could extend the current *[trim[]]* syntax to only remove leading OR trailing whitespace by adding a suffix to the operator: *[trim:prefix[]]* would remove only leading whitespace *[trim:suffix[]]* would remove only trailing whitespace and enable removing of other leading/trailing text values, not just whitespace, by adding a parameter to the operator: *[trim[foo]]* would remove leading/trailing text "foo" *[trim:prefix[foo]]* would remove only leading text "foo" *[trim:suffix[foo]]* would remove only trailing text "foo" The parameter would also be able to handle repeating text. Thus, you could trim a list of "zero-padded" numbers, like this: [[123]] [[0.004]] [[0007.0]] [[000089]] [[27.00]] [[05.00]] +[trim[0]trim: suffix[.]] would produce this result: [[123]] [[.004]] [[7]] [[89]] [[27]] [[5]] and something like: [[ this is some text... ]] +[trim[ ]trim[.]] would produce this result [[this is some text]] I can think of several instances where such a filter could have saved me untold amount of effort in handling variations on field values entered by users via an $edit-text widget Your thoughts? -e -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/7d1ae8cb-fdf3-4cff-99a2-7c15224a7299o%40googlegroups.com.
