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Search: .lenght - Github
- southern 15y agoA common typo, it seems. But I'm a bit confused as to why this was submitted.
- amirhhz 15y agoIn JavaScript, if you check for a non-existent property on a variable (e.g. aVar.lenght vs aVar.length) it will return "undefined". So people often rely on this behaviour to check if something is an array or not (no comment on whether this is good or bad), with: if(somethingThatMightBeAnArray.length){ // do things with array } So misspelling of length can be making a lot of code out there behave in an unexpected way.
- thousande 15y agoThat is a bad thing as String also have a length property "bar".length; // 3
- jpeterson 15y agoThe same pattern is widely used to test whether an array-like object is empty. Since a length of 0 is also "falsey", it evaluates as false when the array has no elements. A typo in this case would result in the tested array always being "empty".
- kaffeinecoma 15y agoIn a static language this would be flagged as an error. I assume something less than ideal happens in languages such as Ruby. I once worked at a company where a very early piece of code had a typo "properites" instead of "properties". This misspelling became institutionalized, and was used throughout the codebase because it was deemed too expensive to fix. And this was with a static language (with good IDE refactoring support)!
- palish 15y agoI'm confused as to why they couldn't simply: grep -R properites .
- chernevik 15y agoPerhaps they were using . . . something other than *nix. EDIT: Justly downvoted <strikeout>chastised</strikeout> for attempting humor without understanding.
- palish 15y agoThat command works nicely for me in Cygwin. EDIT: Eh, apologies if this sounded like chastising -- I didn't mean to. As a developer who's been trapped in "Windows-mindset" for many years, I wanted to try to inspire other Windows devs to try to use *nix-based solutions even if their only option is Windows development. Cygwin is in a very good spot right now -- it's achieved so much acceptance that even the most hardened institutions now allow it to be installed.
- chernevik 15y agoNo snarkier than my remark, and less snarky than it might have been for being so much smarter.
- storborg 15y agoPerhaps the same reason why "referer" has not been corrected to "referrer".
- kaffeinecoma 15y agoYes, it was exactly like that- lots of code had grown around the "bug", and it was not immediately obvious what other software had come to depend upon it. "Little hairs", as Joel might say.
- kaffeinecoma 15y ago
- strictfp 15y agoI had this problem as a junior dev when my english was weaker. The problem stems from that 'height' is spelled with 'ht', but width with 'th'. Since one often write those words in conjunction, it is easy to mix the endings up. If you're then a non-native speaker and don't run spellcheck on your code, you might end up writing 'lenght' and 'heigth' quite a few times, I know I did :)
- kissickas 15y agoIs there any context to this or are you just pointing the humor of out how common this is?
- kristiandupont 15y agoWell it is basically a list of bugs -- and a rather long one too. Of course there are rare cases where "lenght" is a variable and that name is used in every instance but mostly, these are bugs in code that we all use.
- timdorr 15y ago"hieght" is also a good one: https://github.com/search?type=Code&language=JavaScript&q=.hieght&repo=&langOverride=&x=0&y=0&start_value=1 https://github.com/search?type=Code&language=JavaScript&...
- alpb 15y agonot an attribute of a standard object type, though.
- sjwright 15y agoNeither is length in many languages.
- mark_story 15y agoBut length is in Javascript. Both String and Array have that property.
- sjwright 15y agoWhich is why I said many and not all.
- deleted 15y ago[deleted]
- Navarr 15y agoThe first results are all comments and spellcheckers.
- udp 15y agoIt's not, because reutrn is a syntax error, but .lenght is valid and would return `undefined`.
- jaspervdj 15y agoYes it is, it would work fine as a variable. E.g. var lenght = 23; console.log(lenght); will not cause any troubles. And many of the results returned by the search are of this kind.
- theli0nheart 15y agoI remember seeing a Github bot a couple weeks ago that strips out whitespace and adds a .gitignore file to a repo (I also remember this really rubbing some people the wrong way). This search indicates that it would probably be useful to have a linter bot running on Github for all the popular languages. It would find syntax errors, common mispellings, and compilation issues, and then submit pull requests to fix the issues. I have no time to work on something like this myself, but I'm sure a lot of people would find it useful, especially if it acted as a "first defense" before deployment. Curious what other HN'ers think about this.
- andrewcamel 15y agoI actually just replied with a suggestion that Github should implement some built-in functionality for simple error-checking. I think it's a great idea. It would be really helpful if you got a simple little list of notifications for a commit indicating possible error points.
- gravitronic 15y agoavoid feature creep! github's platform allows for bots to run, a bot is a perfect way to implement this instead of it being "built-in".
- Noughmad 15y agoSo basically something like Krazy does with KDE: http://ebn.kde.org/krazy/ http://ebn.kde.org/krazy/
- Mizza 15y agoI wrote that bot! https://github.com/Miserlou/WhitespaceBot https://github.com/Miserlou/WhitespaceBot Feel free to fork it to do whatever you want, that's why I made it.
- xyzzyb 15y agoAh, aggressive trailing whitespace removal. That I can completely get behind. I've already got command-s bound to a custom macro that strips trailing whitespace in TextMate for myself and my co-workers; but this would be an even more inclusive solution.
- joblessjunkie 15y agoIt should be possible to build a bot that automatically generates patches and pull requests for these kinds of typos.
- deleted 15y ago[deleted]
- obilgic 15y agomost of them are variable names which is acceptable!
- VMG 15y agoNot at all. It's irritating and confusing. Come back to that code in a year and try to extend it, stuff will break because you start to use the correct name.
- andrewcamel 15y agoIt'd be great if Github would scan your code for errors like these and just let you know they exist (in case you didn't want them to, which I would assume you wouldn't for the most part).
- veyron 15y agoSomeone wrote a spellchecker a while ago using perl spellchecker: http://blog.holdenkarau.com/2011/08/automatic-spelling-corrections-on.html http://blog.holdenkarau.com/2011/08/automatic-spelling-corre...
- josegonzalez 15y agoFor the record, Github's search index is wayyy out of date sometimes. The second user here is me and I deleted that user like two years ago: http://cl.ly/0y271f0T3G0X2J1L022E http://cl.ly/0y271f0T3G0X2J1L022E
- eik3_de 15y agoSame here, I contacted support two times in two years and they said "we're working on it". Obviously, that isn't true and they just don't care about the outdated search index.
- angrycoder 15y agoEven the search has a bug. The query is for ".lenght" but many of the highlighted results are just lenght without the dot.
- cpr 15y agoProb a reg exp so matches any char...
- andrewflnr 15y agoBut then shouldn't the highlighted bit include the char in front? It's also case insensitive. I think it's trying to be clever.
- mattdeboard 15y agoMore likely is form/input validation.
- gren 15y agoWhat about this one: https://github.com/search?type=Code&language=JavaScript&q=fucntion&repo=&langOverride=&x=0&y=0&start_value=1 https://github.com/search?type=Code&language=JavaScript&...
- zeratul 15y agoI thought this is actually interesting but I would like to know if >4k misspellings is a lot or not. Here is one way to do it: LANGUAGE #LENGHT #LENGTH = #LENGHT/#LENGTH JavaScript 4252 2907459 = 0.0015 C 18981 2902857 = 0.0065 Java 7706 2348900 = 0.0033 Ruby 10789 1690604 = 0.0064 C++ 9458 1315552 = 0.0072 PHP 3116 1167924 = 0.0027 C# 1352 937647 = 0.0014 Python 3662 737292 = 0.0050 Ruby 1232 380484 = 0.0032 Perl 1239 258892 = 0.0048 Objective-C 679 238051 = 0.0029 P.S. There is something wrong with Github's language breakdown algorithm, sometimes it shows same language twice with a different number of hits.
- koenigdavidmj 15y agoC# I can understand being so low, since it's almost always written in Visual Studio or MonoDevelop (both of which provide autocompletion). But how is JavaScript the next lowest?
- JesseAldridge 15y agoHmm, I guess it's because length is a commonly used function in Javascript, but not in other languages. In Python you do len(list) instead, so the word length is more likely to appear in comments and therefore less likely to be corrected.
- sjwright 15y agoBecause the built-in .length property is frequently used, and will fail if misspelled. Whereas C and C++ programs tend to have a lenght operator implemented by the programmer, and from there the error gets snowballed by IDEs and debuggers.
- untog 15y agoC# is also a compiled language, so you wouldn't be able to get anything to run with a typo like that hanging around. I find it surprising that there are so many commits making that mistake!
- baddox 15y ago
- deleted 15y ago[deleted]
- flexd 15y agoAnd this is why we have testing frameworks.
- wahnfrieden 15y agoAnd static analysis.
- azth 15y ago... and compiled languages. Testing won't ensure 100% code coverage.
- flexd 15y ago... and nice things like https://github.com/scrooloose/syntastic https://github.com/scrooloose/syntastic for vim (or your editor of choice).
- billpg 15y agoMy experience is more with languages that are typically compiled and would report this error as an error fairly early on, so the coder would correct it long before checking the code in. What's the trade-off by having "undefined" returned instead of having an error reported as soon as the code is loaded?
- nostrademons 15y agoIt prevents you from later defining a 'lenght' method and using it at runtime without a recompile. For core methods like 'length', it seems silly to think that you'd want to redefine it. And indeed, it's usually counterproductive - that's why any experienced JavaScript dev will have coding conventions like "Don't muck with the prototypes of built-in objects." But at the application layer, this can be really useful. Imagine you're adding a new field to a message deep in the storage system, and then you want to pass that along to a template in the rendered HTML. It's really useful to be able to do this without recompiling & restarting each individual server between the backend and the frontend, and just edit a few template files and have them automatically pick up any changes to backend data formats. Ditto adding a new database column, if you're using an RDBMS - it's pretty handy to have your model objects instantly reflect the new field, instead of needing to manually add accessors to each of your model classes. Rails and Django are built on this principle. Also, you have a versioning problem with statically-compiled code in a distributed system. Imagine that you add this new 'lenght' field to a backend message, and add it to the frontend, and they both compile & deploy. Now imagine that a message from an old backend hits a new frontend (it's not possible to upgrade a whole distributed system at once without downtime). What does the new frontend do with it? It needs a piece of data, but the backend had no idea that it had to provide that piece of data. The only thing it can do is return the equivalent of 'undefined'. In C++/Java code, you usually deal with these by inventing frameworks. Google code, for example, is littered with if (msg.has_new_field()) { run_long_complicated_ui_display_routine(msg.new_field()); } else { fall_back_to_old_behavior(msg.old_field()); } checks. If you use a more dynamic language like Python, you can use language mechanisms to represent undefined values or fields that are defined at runtime. If you use a static language, you're stuck mimicking them with hashmaps and null.
- aardvark179 15y ago
- mrchess 15y agoThis reminds me of a US company I worked with that outsourced some of their service layer work to a company with heavy European influence. As a result, API methods also had the spelling of certain words eg. getColour() or getFavourites(). Good times.
- xcud 15y ago'wtf' is a good search term when coming into contact with a new codebase; https://github.com/search?type=Code&language=JavaScript&q=wtf&repo=&langOverride=&x=0&y=0&start_value=1 https://github.com/search?type=Code&language=JavaScript&...
- justinhj 15y agoFor some reason in video game source code I see the word 'hierarchy' in comments spelt wrong a lot in every project I've been on.
- j_baker 15y agoEqually scary to me is "UFT8". https://github.com/search?langOverride=&language=&q=uft8&repo=&start_value=1&type=Code&x=18&y=22 https://github.com/search?langOverride=&language=&q=...
- speleding 15y agoI just tried "heigth", it's almost as bad.
- eik3_de 15y ago105395 results for heigth, now beat that ;)
- jond3k 15y ago# Language Illiteracy 1 C 0.02877583 2 Perl 0.01635618 3 Ruby 0.01560477 4 JavaScript 0.01330989 5 Shell 0.01235425 6 Python 0.01046104 7 PHP 0.00910218 8 Java 0.00736395 (For height, length and hierarchy, averaged out) And you thought this would end up being a PHP joke... https://github.com/jond3k/sandbox/tree/master/github-illiteracy-index https://github.com/jond3k/sandbox/tree/master/github-illiter...
- davidmccann 15y agoRecieve. Has to be my number one pet pieve. https://github.com/search?type=Code&language=JavaScript&q=.recieve&repo=&langOverride=&x=26&y=21&start_value=1 https://github.com/search?type=Code&language=JavaScript&...
- gus_massa 15y agoIn the LaTex editor that I'm using (WinEdt), I have a custom color highlighting that marks \rigth and \heigth in red+bold+strikeout, so I don't have to wait to compile and see a strange error to spot the mistake.