I am trying to create a weblink by concatenating 2 strings and by avoiding the display of the full link in an infobox. mw.site.currentVersion, mw.site.scriptPath, etc etc. Calling Lua code is done through L.CallByParam, which takes a parameters object, P, and arguments as variadic parameters. It Is Me Here t / c 15:08, 3 September 2013 (UTC). -- Sameboat - (talk) 04:26, 19 March 2013 (UTC). I'd rather see useful LUA links. Debresser (talk) 10:57, 8 December 2013 (UTC), Is the "Wikipedia namespaces" infobox necessary top right? I've taken some steps to bring it partially in line with our Template documentation system. try: with open("foo.txt") as f: now i wanted to translate Category:Pages with script errors in bn language. The body of the compiled Lua function consists of a series of function calls to the helper functions, one per instruction. Now the tab "Modules" does not show all modules, and does not have a 'next page' link. If nothing happens, download Xcode and try again. Hex (? The LState is needed for interacting with the Lua VM, most commonly for retrieving function arguments. P:S Creating separate module for template2 in above example is not feasible because I am trying to reduce the number of template substitution and writing separate modules would defeat the purpose.--Jayarathina (talk) 05:20, 24 December 2013 (UTC). Each layer of "shell templates" (to #invoke a Lua function) also increases the expansion depth by about +2 levels of the 41-level limit (shows "41/40"). Johnuniq (talk) 22:58, 10 January 2014 (UTC). It uses heavy meta-programming to get things done. may be relevant to this problem. We now have the /doc system somewhat integrated/forced trough the Scribunto extension. The value of any of these keys will never be. What I'm trying to do is much more complicated, see Module:Convert/makeunits, but is the same issue. 1 Answer Sorted by: 3 I would generally recommend to avoid making high volume calls into Lua. Lori Baker - via Google. to use Codespaces. Throughout the post L will denote a pointer to lua.LState. I have used the mw.title library with a call like mw.title.new(page_name):fullUrl({uselang=lang}), but mw.title.new() is marked as an expensive function so I would like to known if there are alternative.--Moroboshi (talk) 07:06, 18 May 2013 (UTC), Is there a way to use the Mediawiki API inside Lua? The gopher-lua library operates on a interface called LValue. It stays global and doesnt get collected by a GC until it has been set to nil. The same can be said about making your program expandable with plugins. How about expanding the template's function so that we can also put at the top of template /doc pages? These variables are called the formal parameters of the function. The formal parameters behave like other local variables inside the function and are created upon entry into the function and destroyed upon exit. While creating a Lua function, you give a definition of what the function has to do. Normally this wouldn't be an issue, except I was wondering if you write a Lua module that requires another Lua module or mw.title.new()s a data file, is the target module or file protected when the main module is cascade-protected? ?0" here but useful if omit above. Please let me know your thoughts over at Template talk:Pagetype#Module:Pagetype. Thank you for your attention!--Qgil (talk) 21:16, 2 July 2013 (UTC), I created Module:Testcase table, and it seems to work pretty well (see the current transclusions). Think of Lua scripts as functions - you can call them with require or do_file and they can return variables. Servicing Northern California For Over 25 Years, Select The Service Your Interested InDocument ShreddingRecords ManagementPortable StorageMoving ServicesSelf StorageOffice MovingMoving Supplies. !) 16:49, 3 April 2013 (UTC), I've created five categories for different levels of Lua module progress: since each explains the others, Category:Modules in alpha should be sufficient. In Lua, all arrays are 1-indexed, however t[0] is still valid but that would result in the lenght of the array to be off-by-one. The related, but separate issue, for speed of #invoke, can quicken every use of Lua, if 1.22wmf1 successfully doubles the speed of each #invoke. Wnt (talk) 15:52, 22 January 2014 (UTC), Wikipedia:Lua/To do, a page you substantially contributed to, has been nominated for deletion. Johnuniq (talk) 09:37, 7 October 2013 (UTC). That is partly about performance but mostly about engine architecture. I think it's worth checking back about how far we can go toward an ideal bare {{#invoke:SomeName}} format, since the extra parameter is only a nuisance/confusion to many non-Lua users. If you're a Lua developer, please watchlist it. If you need a debugger, I recommend checking out. Comments appreciated. the colon operator. -Wikid77 (talk) 12:07, 24 March 2013 (UTC). The simplest language I know. NeoVim, which uses Lua scripts for user script code. Isnt it great? I was just trying to return those hex tables via loadData and seem to have run into a nasty surprise. Do I need to use %f and remove the trailing zeros with string.match or string.gsub? You are free to edit the content of Wikipedia:Lua/To do during the discussion but should not remove the miscellany for deletion template from the top of the page; such a removal will not end the deletion discussion. To maintain similarity with other sandbox pages (in template space and user space), I propose: If we agree on this, we can encourage/discourage patterns. Or is it something else? its number of parameters. Dont put too much code into one script - its easy to separate everything into smaller scripts. Are you sure you want to create this branch? The function is followed by the arguments, in order. Then, see if you really need to move this code (or parts of it) to C++. I very much regret that. My new test module Module:Sandbox/iantresman/sandbox/archive/mw.recursive prints out "frame.args" arguments passed to it, but is not recursively printing "mw.site" library functions/table when accessed from User:Iantresman/sandbox/archive/mw.recursive. It's just that a central repository would be so beneficial for everybody (en.wiki devs/editors included) and en.wiki can't really be (in my honest and personal opinion) that place. (At least script error should be shown when print function is detected.) If nothing happens, download GitHub Desktop and try again. is there a better way to do this? Support for calling a parser function is coming soon with frame:callParserFunction, or you could do it today by passing the markup to frame:preprocess. The second clause supports a simple way to invoke the function from another module (such as from Module:Navbox), or from the debug console: Navbar.navbar({arg1 = 'foo', arg2 = 'bar'});. You can call a function with a number of arguments different from Hard working, fast, and worth every penny! Perhaps li in a list or tr in a table? Similarly to the previous advice, when defining classes (e.g. Sorry if this was discussed before, but I did not find relevant links in a couple of minutes. In our C++ file, we need to define the consoleLog function that it will receive from JavaScript. Although Lua can still process the 6,000 parameters, to compare choices, within "0.02" Lua seconds, the load time of the #invoke interface is 27 seconds. The general method that has been used is to assume a format for the page archive name and then test for the existence of all such possible pages using {{#ifexist:}}. ), The disadvantage of course is that bugfixes in modules like Redirect don't get passed on. as it does in a multiple assignment: Vanilla Lua, the latest version, otherwise. Exposing Go functions to Lua is essential to create custom a custom API. New versions come out once in a while, but you can comfortably stay on Lua 5.2 not loose much. (In the case of Module:Redirect, when I look at the pages that link to it I could easily think, meh, it's not even used by 50 pages, why not start making a series of small edits as long as they preview OK? WebDue to the short-circuiting behavior of or, it will generally impose little additional overhead at call-time: local soundit; do local sounds; function soundit (x) sounds = sounds or { a = "ay" , b = "bee" , c = "see" , . } assert ( type (x) == "string" ) return sounds [x] end end I see that I can access Mediawiki libraries as simple as "mw.stat", are modules on Wikipedia accessible as easily? lua.LVAsString(v LValue) - Converts LString and LNumber to string. Page contents not supported in other languages. It would be much faster to pass a single parameter, as a single string of delimited choices, alternating with resultant values, rather than try to pass 3,000 choices as 6,000 parameters, which has been running about 27 seconds in the parser. There are a number of To(n int) functions available. Of course, the specific delay depends on server load, but follows the general exponential slowdown formula, where 7,000 parameters is far slower than a linear extension of 7000/6000 or 17% slower, and runs closer to 47 seconds (+70% slower) rather than 27+17%=31.6 seconds. Many 3rd party Lua libraries usually work with Lua 5.2/5.3/5.4. The parser seems to reject any effort to initialize a table in the return statement if one of the indexes is, or could be, interpreted as a number. ", [ [\w+\. Cya. I want to output wikitext like this: I have previously done that and it worked well, but when the text between the tags is more varied, something breaks. There are still a few things I'm not sure about, though. Currently it is misleading advising to check for double redirects. by displaying a message box/writing to a log), but if your init.lua is not meant to be modified externally, maybe you can do it like this? The system compares actual template output with fixed text, and is only suitable for templates and results that are reasonably short because each template and its expected result have to be in one line. -DePiep (talk) 11:51, 22 March 2013 (UTC). Anyone interested in testing templates may want to try Module:Convert/tester which allows hundreds of tests to be easily defined. Its neat. However, sometimes that is just not enough and an embedded language can be the solution. When programming in Lua, you may use constructors to avoid th ose initial rehashings. When you write {true, true, true} , Lua knows beforehand that the table will need three slots in its array part, so Lua creat es the table with that size. if u can help me)I imported Module:Citation, Module:Citation/CS1/Configuration, Module:Citation/CS1 in bn.wikipedia. Yes, you can replace built-in functions because they are simply functions accessed from global variables. For example, I might want to process the posts on a talk page, and add some extra formatting. And to fetch an argument without conversion the L.Get(n int) function can be used. Functions are the main mechanism for abstraction of statements The LTable type can be used for emulating namespaces and classes. Village Pump (policy)#Protection and management of scripts? 3 Learn more. :P Anyway, I have taken that idea and added some parameter checking and some documentation, and called it Module:User:Mr. Stradivarius/PrefixIndex. Your opinions on the matter are welcome; please participate in the discussion by adding your comments at Wikipedia:Miscellany for deletion/Wikipedia:Lua/To do and please be sure to sign your comments with four tildes (~~~~). What am I doing wrong? I think it really depends on the language and on the function. While the c and c++ compilers can inline a lot of functions, this is not the case fo It can do everything youd ever want from Lua and even more. Because it makes it much easier to track dependencies between various script files and makes them load each other when theyre needed. Mr. Stradivarius talk 01:15, 29 October 2013 (UTC), How well does Scribunto defend itself against DoS, or possibly XSS, but especially DoS as we are dealing with a Turing-complete language? Use Git or checkout with SVN using the web URL. Otherwise empty string. If needed, custom metadata can safely be written to the metadata table; it is unique for each key and will persist for the duration of the load() call. If you think that your game became slow because of Lua code, profile first before rewriting it in C++. Can one call lua function that returns sevaral strings and pass them to a template? This was possible because the wikimarkup language was very intuitive, and easy to understand even for the layman. = --Jarekt (talk) 16:24, 14 March 2013 (UTC), Are module authors permitted to use other licenses (presumably in addition to the CC-BY-SA license) for modules they develop? 2015 Nils Lagerkvist. 1 time resty -e 'ngx.re.find ("hello, world. If so, I can add Module:WikiLink to d:Q14746829. Its much easier to test if something is non-nil or has a specific type/fields in Lua than in C++. Also, this page should explain that it is not possible to move a module to another namespace or vice versa, except doc pages (I think). Writing code like this will become better with new #embed directive in future C/C++ versions, e.g. I think that this is less effective than it could be, however. Given an instance myqobject of this class, a Lua program can emit signal mysignal as follows Instead of requiring Module:Redirect from a protected module (or in this case a template, Template:Submit an edit request, which serves MediaWiki:Protectedpagetext), you would simply require or link to a copy (Module:Submit an edit request/Redirect). Wnt (talk) 15:56, 6 January 2014 (UTC). Work fast with our official CLI. Automatic transclusion of protection templates was added. And you can do even better, you can hide library details and not expose them to Lua at all which will make switching between lower-level frameworks much easier, for example: If you want to use a C library and youre using LuaJIT, you dont even need to create a binding for it at all. Everyone took really good care of our things. They both open a file, read one line, and close it, or do nothing if there was some error opening the file. The redis instance enables the script to interact with the Redis server that's running --Iantresman (talk) 00:06, 12 December 2013 (UTC). Currently, there are a reasonable number of templates that try to determine if any of a set of pages exist in order to provide links to those pages. --SocietyBox (talk) 02:26, 20 January 2014 (UTC). mw:Extension:Scribunto/Lua reference manual, Getting started ("hello world") portion of the Lua reference documentation, Sumana Harihareswara, Wikimedia Foundation Engineering Community Manager, MediaWiki:Scribunto-doc-page-does-not-exist. Ive written many articles about using Lua with C++ on my old blog many years ago. --Aftab1995 (talk) 15:50, 23 May 2013 (UTC), I'm very happy to announce that Template:FlagiconLua has reached feature parity with Template:Flagicon! its hard to know if what youre passing to Lua will be copied or passed by a reference). also, if someone already wrote a module that does the same thing, let me know and I will have this one deleted. Ginsuloft (talk) 13:39, 30 October 2013 (UTC), currently, in Module:Historical populations, I am using a somewhat convoluted method to access 'formatnum' which involves passing 'frame' and using 'callParserFunction'. The XLua object also has a substantial MMF Interface for directly querying and modifying game objects and state The simplest way to time some Lua code is to use the time command with the resty command. There is still lots of work to do of course, But it's a start TheDJ (talk contribs) 22:18, 18 March 2013 (UTC). {\displaystyle d=3^{(n/2000)}.} And finally, see what LVE and PICO-8 do. If you wish to retain the metadata for logging or other purposes, the entire metadata table is returned as the third return value from load(), containing the metadata for every key that was operated on (including those with no conflicts). However, in the example where SomeClass is returned as a local variable, you wont need to do this - if you just load the script.lua, it would execute some_class.lua when you call require (it would only do this if another script didnt call it, otherwise it would return a cached SomeClass variable). Then, executing script.lua would resullt in an error: SomeClass is nil. A fixed size callstack has the highest performance and has a fixed memory overhead. If an argument to a function can be of more then one type the L.CheckTypes(n int, types LValueType) function can be used to check and yield an error to the user. Still, there are a lot of options available maybe someone can think of something? Please don't take those *personal* suggestions as a criticism to Wikipedia:Lua. For example, Module:Navbar contains the code: In what case would frame not be equal to mw.getCurrentFrame()? If a conflict can not be resolved in a satisfactory manner, the function should throw an error to signify this; returning false or nil will result in that value being written to the key. A very simple test is: Result #2 is brokenthe first line includes a working wikilink (should not happen inside pre, but would happen if had a single space at the beginning of the line, with no pre). Makyen, does that look something like what you wanted? The approach of Module:Sandbox - having every user put scripts into a common receptacle - seems unworkable. d The message from MediaWiki:Movepagetext-noredirectfixer should warn about this, perhaps a warning like MediaWiki:Moveuserpage-warning. Command line parameters, environment variables, and configuration files are common ways to change the behavior of software. Does this apply if you are accessing the module from another Lua module, and not directly from a wiki page? Your help pointing to ways to improve is welcome. is to create and maintain customer confidence with our services and communication. Snipre (talk) 07:52, 31 October 2013 (UTC), Is there a LUA method for '#ifexist' that doesn't generate false incoming links? During operation, in the event that any functions share the same name, a table will be created with that name and the conflicting functions will be stored there using the name of the script they came from, such that with two scripts foo and bar, both containing the function foo, you would end up with the functions foo.foo and foo.bar. In the example bellow sayHello function is first defined, and then called in the second call to DoString. Otherwise false. Its easy to integrate Lua scripts into C/C++ projects. sign in For instance, all library functions are written in C; The functions in question had a single parame If you notice that your C++ function has a huge overhead because of Lua calls, consider using this pattern: // in C++ sol::table t = lua.create_table (); for (int i = 0; i < 1000; i++) { // do stuff in C++, push data to Lua table occasionally } luaFunc (t); -- in Lua function someFunc (t) for k,v in pairs (t) do -- do stuff end end 5. Felicia Hagler - via Google, In the middle of a big move and so far Jay Casey has been immensely helpful to us with all the details! -- Don't need the "%. Is there a way for a loadData table to contain these keys? Right now I'm putting ratings on the documentation subpages, which I think is what someone suggested before at one point for categories. Greetings Stephan Kulla (talk) 15:54, 19 May 2013 (UTC), (Sorry for writing here. To do this it calls the Lua bytecode compiler and then it converts the bytecode to C. For each function in the module, the code generator produces an appropriate function header and then it iterates over the functions bytecodes, outputting a block of C code for each instruction. If youre writing a game and want to make it possible for people to create mods, many of your players are likely to know Lua thanks to such games as Minecraft, Factorio, Garrys Mod, World of Warcraft, Roblox and. The messages for /doc inclusion are currently added as contentlanguage, where really only their parameter should be included as such. Makyen(talk) 04:02, 8 May 2014 (UTC), I've heard for quite a while that the Lua scripts only run when the page is parsed, which rules out many interactive features but is efficient. This bytecode is converted into LLVM IR and then fed into Deegen, which can transform the functions to do tail calls correctly, use the GHC calling conventions, and a The Lua version has some differences from the current template, so I would like to get others' comments before making the switch. Can do a lot of automagic and save you from writing tons of boilerplate code, which you need to do if you use other bindings or Lua C API. The resty command itself has a startup and exiting overhead. I was wondering if there is a way to improve the performance. A [6] question at Module:Redirect reminded me of a remarkable statement by @Wikid77: that updating some Lua modules can cause 7 million pages to be reformatted on the WP:Job queue. The first question, of course, is whether we should require() at all. Is a module supposed to do something clever in order to output tags? {{. If you create a local object inside the coroutine and store the reference to it in C++. string.format('%f %f %f', 0.00001, 1.2, 3) => 0.000010 1.200000 3.000000, string.format('%g %g %g', 0.00001, 1.2, 3) => 1e-05 1.2 3, This page was last edited on 4 February 2023, at 15:13. Text formatting (bold, italics) breaks when the ''/''' tags are not closed for each argument. Should I return a sequence of hundreds of strings relying on Scribunto in concatenating it? I was going to deploy it on Template:Year in other calendars/testcases, but in my preview it runs out of time by the time it gets to the last test. See discussion at Village Pump (policy)#Protection and management of scripts?. 2000 An auto sizing callstack will allocate and release callstack pages on demand which will ensure the minimum amount of memory is in use at any time. I'm a rookie! Basically, you need to tell Lua explicitly that something youve created in the coroutine needs to outlive this coroutine (and this is done with lua_xmove). DePiep (talk) 23:55, 21 May 2015 (UTC). Maybe. The compiler might decide "hey, this function is only called a few times, and I'm supposed to optimize for speed, so I'll just inline this f Have there been any major incidents yet? lua.LVAsBool(v LValue) - Convert to bool, nil and false becomes false. Older versions of Lua created empty tables with some pre-all ocated slots (four, if I

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