[deleted]
The string type is broken
31–40 of 230 posts
Re: The string type is broken
#32Do people really need to reverse strings in the real world? I don't think I've ever written code to do that outside of homework assignments and interviews.
Substrings exhibit similar problems and those are used quite often. It's just that in this case the effect of seeing it fail is a little more dramatic (i.e., l̈ – which doesn't even seem to render properly here).
Re: The string type is broken
#33˙ƃuᴉuɐǝɯ ⅋ 'spɹoʍ 'sɥdʎlƃ 'sɹǝʇɔɐɹɐɥɔ uǝǝʍʇǝq 'ɹǝʌǝʍoɥ 'ǝɔuǝɹǝɟɟᴉp ɐ sᴉ ǝɹǝɥ┴ ˙ʇxǝʇ ɥʇᴉʍ punoɹɐ ƃuᴉsɹɐ oʇ sǝɯoɔ ʇᴉ uǝɥʍ sǝᴉʇᴉlᴉqᴉssod ƃuᴉʇsǝɹǝʇuᴉ ǝɯos sɹǝɟɟo ǝpoɔᴉu∩
Re: The string type is broken
#34Upvotes for the OP who posts "Disrupt 'Is Broken'".
Re: The string type is broken
#35The string type isn't broken. If anything these "X is broken" posts are broken. Taking one special case, finding problems with that case and deducing that the whole concept must therefore be discarded is just silly. Strings work fine for the vast majority of use cases. No technology is free of flaws and engineering decisions are almost always based on weighting the pros and cons and choosing a solution that on balance works best. Strings are a useful feature and Unicode is a notoriously hard problem. Proposing to go back to arrays of characters makes things worse for most people in most cases and therefore is not a practical solution.
Re: The string type is broken
#36This is now my favorite example of a leaky abstraction.
Re: The string type is broken
#37If you are actually manipulating strings rather than just storing and pushing them around I would suggest looking at ICU. Handling Unicode is difficult and it's easy to confuse encodings, code points and glyphs or make assumptions based on your own culture and language.
ICU has support for a lot of the basic operations you would want to perform on strings as well as conversion to whatever format is suitable for your platform and environment.
Re: The string type is broken
#38I think the mistake here is seeing a string as an extension of an array or vector. What I would prefer is a string type that didn't support all the operations of vectors. The length of a string is not inherently a meaningful question (and for the cases where it is, what you want is something like a vector of grapheme clusters - which is a useful type to have, but not so useful that every string in your program should…
I'm with you here; but in that case, I'd like an ascii_string type, which most languages don't provide specifically. This type _would_ support string reversal, substring slices, and so on, but be limited to 7-bit ASCII only. I think there are many use cases that are purely internal, and don't need i8n. It's handy to be able to do things, including operations on strings, for internal things. Filename handling where you control the filename, the "keys" in languages which use strings for a dictionary type, and so forth.
Re: The string type is broken
#39That's because in a truly sane languages there should be a distinction between data type and its implementation. Then it would be not "string" type, that's broken, but an implementation of "string" type.
I agree, it seems like a much saner thing to do. Now that you make me think of that, I do not know many instances of this. I just could think of https://github.com/clojure-numerics/core.matrix upon which I stumbled recently. Do you have other example of efforts to separate a type from its implementations?
Re: The string type is broken
#40Perl seems to pass nearly all the tests (including uppercasing baffle):
$ perl -E 'use utf8; binmode STDOUT, ":utf8"; say uc("baffle");'The only failure I can see is that it treats "noel" as 5 characters (so reports length as 5 and reversing places the accent on the wrong character). That's documented here: http://perldoc.perl.org/perluniintro.html#Handling-Unicode "Note that Perl considers grapheme clusters to be separate characters"
All else seems to work though (including precomposed/decomoposed string equiality etc). The docco also says that perl's regex engine with Do The Right Thing with matching the entire grapheme cluster as a single char.