On Fri, Jan 26, 2018 at 5:27 PM, Steven D'Aprano
tcl/tk and Javascript only support UCS-2 (16 bit) Unicode strings. Dealing with the Supplementary Unicode Planes have the same problems that older "narrow" builds of Python sufferred from: single code points were counted as len(2) instead of len(1), slicing could be wrong, etc.
There are still many applications which assume Latin-1 data. For instance, I use a media player which displays mojibake when passed anything outside of Latin-1.
Sometimes it is useful to know in advance when text you pass to another application is going to run into problems because of the other application's limitations.
I'm confused -- isn't the way to do this to encode your text into the encoding the other application accepts ? if you really want to know in advance, it is so hard to run it through a encode/decode sandwich? Wait -- I can't find UCS-2 in the built-in encodings -- am I dense or is it not there? Shouldn't it be? If only for this reason? -CHB -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception Chris.Barker@noaa.gov