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. He has also implemented a number of incredible little libraries which Ive used in my projects: Many other great libraries can be found via LuaRocks: https://luarocks.org/. Lua is written in ANSI C, so it can compile almost everywhere. You're looking for performance in the wrong place. The problem with function calls is not that they cost much. There is another problem. Function c -- The parentheses remove the "number of changes" returned by gsub. In our C++ file, we need to define the consoleLog function that it will receive from JavaScript. (alright, the bot might miss that one, unless it knows to go back and check a template by the same name also, but you understand) My feeling is that if the reuser is going to put millions of pages on the queue, he should have the chance to decide whether he wants the latest update in the module to be passed along, or if it can wait. a function definition has a conventional syntax; Formula: 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:}}. now i wanted to translate Category:Pages with script errors in bn language. Its minimalistic, but requires a lot of boilerplate and manual error-checking. -- Gets numbers for row1, row2, etc. Is this the right place for Lua programming queries? What to write in Lua: gameplay logic, FSMs, cutscenes, etc. See the demos and more details at WikiProject Flag Template. Affects Lua, templates & parser functions: Again, the time-delay overhead, to pass thousands of parameters, not only affects the Lua #invoke interface, it extends the same exponential time-delay slowdown in passing parameters to templates as well as "|x=" branch-choices in a #switch function (which also runs 27 seconds to process 6,000 branches). the colon operator. Functions can both carry out a specific task There is still lots of work to do of course, But it's a start TheDJ (talk contribs) 22:18, 18 March 2013 (UTC). I've been trying to get to grips with the concept of frames, and I think I'm almost there. Calling JavaScript ?0" here but useful if omit above. Similar to avoiding use of prior utility templates, when writing other utility templates, I would recommend to use the direct #invoke to access Lua functions from a utility template. However, I found that returning mw.message.newRawMessage("{{User:Wnt/Templates/Sandbox2}}"):parse() produces a timestamp that never changes when the page invoking the module is reloaded, because the page transcluded is not checked at all. Will your logo be here as well?. How to implement action sequences and cutscenes in Lua, Making and storing references to game objects (entities) in C++ and Lua, https://www.lua.org/manual/5.4/manual.html#4. But with the banning of the print function and the extra steps to validate the lua code in Wiki, I can't tell if the lua.org tutorial truly helpful to me as I don't know how to convert all those examples to comply with MediaWiki's lua standard. -Wikid77 (talk) 12:07, 24 March 2013 (UTC). Learn more. Unfortunately, I have not yet been able to think of a way to mix this logic to get what I want, namely a way to control whether results are updated daily or weekly, etc., because I haven't thought of a way by which the logic of whether time has passed will always be evaluated but the logic of the page content will not be, unless the time has come, at which point the caching should be updated on that page. Please take a look, critique it, test it, and let me know if there is anything that should change before I look at deploying it to some of the maintenance templates. What is the equivalent of {{fullurl:page name}}? This was possible because the wikimarkup language was very intuitive, and easy to understand even for the layman. Thank you. Providing global relocations solutions, storage and warehousing platforms and destruction plans. I've created a new request page for Lua scripts at Wikipedia:Lua requests. A complete example looks like this: The LState defines some convenience functions, in the example above we are using L.ToInt(1) to fetch the first function argument. Then, executing script.lua would resullt in an error: SomeClass is nil. If you used classes as globals (which Ive seen in many tutorials and real code), you might have a script like this: Suppose that you didnt execute some_class.lua first (which defines a global SomeClass). 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. I bypassed the most serious problem, but for some reason the method is generating incoming links to nonexisting articles. Do I need to use %f and remove the trailing zeros with string.match or string.gsub? Putting the following into the debug window gives the values shown: I don't need the functionI'm just asking if it has a bug. Otherwise false. The functions in question had a single parame In Module:Sidebar, I extended the boilerplate further to allow a third way, invoking the module from a template and passing args in explicitly (instead of using whatever args were passed to the template), like {{#invoke: Navbar | arg1 = foo | arg2 = bar}}. 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. A fixed size callstack has the highest performance and has a fixed memory overhead. The process was smooth and easy. . 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. Thank you!--QuimGil (talk) 07:52, 21 June 2013 (UTC). Similarly to the previous advice, when defining classes (e.g. Enrique Garca Cota has a lot of great articles about Lua: http://kiki.to/. Please comment over there if you're interested. n 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. Then, see if you really need to move this code (or parts of it) to C++. Cya. This is typically done with a copyright template placed on your user page though you might want to modify one of them to specify that it only applies to Lua modules. See discussion at Village Pump (policy)#Protection and management of scripts?. 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. DePiep (talk) 23:55, 21 May 2015 (UTC). It may sound like asking to be babysat or spoon-fed, but I'm totally stuck. ) Lua 1 time resty -e '' We can see theres overhead of about 11 milliseconds on this machine. Plastikspork (talk) 22:08, 2 November 2013 (UTC), I've created Module:Pagetype, a replacement for {{pagetype}}, and I am thinking of updating the template to the Lua version later on this week. Just some of our awesome clients tat we had pleasure to work with. The parameters object takes three important parameters: Fn - the lua.LFunction to call Nret - The number of returned values Protect - If protect is true an error is returned, otherwise a panic will occur. Still, there are a lot of options available maybe someone can think of something? ( 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? Theyre mostly written in C/C++ and only expose a bunch of Lua functions/tables to the user. Preceding unsigned comment added by Ryn78 (talk contribs) 03:27, 13 October 2013 (UTC), Is it possible for a module to invoke another module? I'm a happy user of this space myself with the pet projects I develop in my free time. 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. The #invoke speed in March 2013 has been about 180/second, compared to short templates running 350-600 per second, or parser functions >750/second, or character-insertion templates running 2,400/second. Lua Hi, is there a way to instruct string.format to not produce trailing zeros with decimal notation? Lua 5.4 After your basic game engine is implemented, start with writing new code in Lua. Of course, you can check for this files existence and handle errors appropriately (e.g. Integrating it with CMake is somewhat trickier. The advantages are a) edits to Redirect to add irrelevant features don't lead to massive queue usage, b) Redirect doesn't have to be protected, and c) in case a required module isn't protected, you don't get confused and fool around with a module you think is in limited use only to find out that you've created a huge server load. OUR MISSION. If you're unaware, {{unsubst}} (along with a few other templates) is used to make it so that entering {{subst:citation needed}} in an article results in {{Citation needed| date=November 2013}} rather than dumping all the template code into the article. And finally, see what LVE and PICO-8 do. There is no reason to do it for functions which are already It is superfluous if you only call the function once within the scope of the local variable, but that is pretty rare. -DePiep (talk) 11:51, 22 March 2013 (UTC). I also worked on a fork of LuaJIT professionally and described my experiences here - this experience made me learn a lot about LuaJIT and how vanilla Lua works (and how it can be used in production for servers with a very high QPS). A language variable can contain values of any type. If anyone could help me to work this out I'd be very grateful. With your own bindings, you can control what version you use and how the exposed API looks in Lua. Also explains why the uselang=qqq hack doesn't work to show the scribunto messages. With a clear upsream in a central place like mediawiki.org then en.wiki and other Wikimedia projects could work better on local support and whatever is specific to their communities. If you'd like to make a request, please do that too! Now the tab "Modules" does not show all modules, and does not have a 'next page' link. 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. Writing code like this will become better with new #embed directive in future C/C++ versions, e.g. thank you. lua Mr. Stradivarius talk 14:16, 4 November 2013 (UTC). Have there been any major incidents yet? Toohool (talk) 18:13, 15 March 2013 (UTC). Since Lua has lexical scope at the block level rather than the function level, this works similarly to the way Python calls __exit__. Almost all of us to be a lot better about putting comments up front in the module and/or documentation saying what the heck our modules are FOR. (what is sometimes called procedure WebThe Lua interpreter offers two hooks for debug purposes: typedef void (*lua_CHFunction) (lua_Function func, char *file, int line); extern lua_CHFunction lua_callhook; typedef void (*lua_LHFunction) (int line); extern lua_LHFunction lua_linehook; The first one is called whenever the interpreter enters or leaves a function. Incnis Mrsi (talk) 11:59, 2 July 2013 (UTC), Hi, your feedback is welcome at Bug 50329 - We need a common repository for Scribunto modules and templates. See the explanation on how to do concurrency in Lua in sol2 here (especially about lua_xmove and sol::main_object). Throughout the post L will denote a pointer to lua.LState. It doesnt have many gotchas. Given that each {{#ifexist:}} is an expensive parser function (EPF), these templates can consume an excessive number of EPFs. Your help pointing to ways to improve is welcome. The Lua version has some differences from the current template, so I would like to get others' comments before making the switch. It would be a bit odd. A cross between resources, documentation, and useful links. Note: Lua isnt zero-indexed, so the first function argument is fetched with L.ToInt(1), second argument with L.ToInt(2). Casey Moving Systems is family owned and has been servicing Northern California for over 25 years. --Iantresman (talk) 11:31, 9 December 2013 (UTC), Can modules "call" other modules? I know we are quite far into WP:DEW territory here, but I'd appreciate it if people could comment at the discussion over at Template talk:Lua#Style. lua.LVAsBool(v LValue) - Convert to bool, nil and false becomes false. Local declaration of (built-in) Lua functions to reduce Wikipedia talk:Lua/Archive 1 Iterative multi-file loader, used to load all Lua modules in a directory and return them as one table. The fact that even an IP user may edit the module namespace suggests that it must be really stable and secure. Mr. Stradivarius talk 23:06, 1 January 2014 (UTC); Page moved without redirect. Sandboxing is easy. You can call a function with a number of arguments different from --SocietyBox (talk) 02:26, 20 January 2014 (UTC). The docs are fantastic too. Page contents not supported in other languages. We now have the /doc system somewhat integrated/forced trough the Scribunto extension. All rights reserved. I am a repeat customer and have had two good experiences with them. 1 time resty -e 'ngx.re.find ("hello, world. 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. for instance, Parameters work exactly as local variables, to use Codespaces. Greetings Stephan Kulla (talk) 15:54, 19 May 2013 (UTC), (Sorry for writing here. lua.CanConvToString(v LValue) - True if LString or LNumber. You can call it with LuaJITs FFI, see the tutorial here. Its fast. The LTable type can be used for emulating namespaces and classes. This will make your life easier, because you would be able to write less binding code and be able to stay inside Lua code as much as possible. They have lots of options for moving. The easy part is 'getting rid of the function name': assuming p is the variable in the last line of the program, just say, However, I see no way to get rid of the pipe - it. You can do procedural, functional, OO programming. See a simple example of how to build Lua with CMake and use it with sol2 here. The redis instance enables the script to interact with the Redis server that's running Youre unlikely to run into performance issues, unless youre making a AA/AAA game or a complex simulation program. WebTo call a Lua funcion, we first push the function onto the stack. 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. Calling Lua Functions - Game Dev Geek Now you dont need to ship this init.lua with your binary and life becomes easier. Fantastic help. This first edition was written for Lua 5.0. The body of the compiled Lua function consists of a series of function calls to the helper functions, one per instruction. Dont put too much code into one script - its easy to separate everything into smaller scripts. Johnuniq (talk) 09:37, 7 October 2013 (UTC). You might also find Moonscript interesting. Mr. Stradivarius talk 12:54, 10 July 2013 (UTC), We have {{WikiProject Lua/header}} that does the header tabs (I started). 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 I'd rather see useful LUA links. What to write in C++: collision detection, path finding, physics, renderer and other things that are performance critical. The XLua object also has a substantial MMF Interface for directly querying and modifying game objects and state Can someone make a nice SpecialPages adjustment? :) Wnt (talk) 02:58, 6 January 2014 (UTC). Because it makes it much easier to track dependencies between various script files and makes them load each other when theyre needed. http://godoc.org/github.com/yuin/gopher-lua, http://github.com/otm/embedding-lua-in-go, http://godoc.org/github.com/yuin/gopher-lua#LTable. The same can be said about making your program expandable with plugins. If those restrictions are not a problem, the new tester provides a convenient way to set up tests on any page, for example: If the above tests were at page "Template:Example/tests", the following would insert a table showing the results of expanding each template and comparing its output with the expected text. I measured the overhead of direct and virtual C++ function calls on the Xenon PowerPC some time ago. The approach of Module:Sandbox - having every user put scripts into a common receptacle - seems unworkable. The documentation toolbox does not yet know about Module testcases (though the editnotice 'sort of' does). You choose what Lua code can and cant do. How much do function calls impact performance? The first question, of course, is whether we should require() at all. When calling a function, --HectorMoffet (talk) 11:05, 29 December 2013 (UTC). via middleclass library), dont do it like this: and then, when you want to create an instance of this class, you do this: Why do it like this? Ive written many articles about using Lua with C++ on my old blog many years ago. Timing Lua Code Correctly in OpenResty itch.io was written with it and it compiles to vanilla Lua. You can even create small domain specific languages thanks to Luas syntax sugar. We have an even split on people who do personal testing in Sandbox/ and people who do it in User: At this point, either of us could pull up stakes and migrate to the other pretty easily. I'm thinking by this point that it would be better to just develop an explicit tool to control caching, and some mechanisms (if they don't already exist) to audit what pages are not cached and identifying the worst reloaders) Wnt (talk) 15:48, 13 January 2014 (UTC). Our areas of expertise include Commercial Moving Services, Warehousing, Document Shredding and Storage Solutions. -happy5214 14:32, 15 March 2013 (UTC), You own the copyright, you can grant whatever licenses you want (in addition, as you say, to the CC-BY-SA license that you've already granted). 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. NeoVim, which uses Lua scripts for user script code. I am trying to create a weblink by concatenating 2 strings and by avoiding the display of the full link in an infobox. Servicing Stanislaus, San Joaquin and Merced Counties, 2209 Fairview Drive Suite A Ceres, CA 95307. Gut feeling is usually wrong. 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! 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 I would generally recommend to avoid making high volume calls into Lua. Vanilla Lua, the latest version, otherwise. If that is not possible: Please suggest an alternative method to implement it. Functions used by a Lua program can be defined both in Lua and So the idea is the next one: But lua has a specific way to treat weblink and it is right now impossible to use a web address as a string. Automatic insertion of the green 'chrome' of our template documentation. How you divide up your code among different At Module:DisplayLuaTableContents I see numerous loops as, , but I learned that strings are immutable and hence this assignment is rather costly. Its much easier to test if something is non-nil or has a specific type/fields in Lua than in C++. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. For example, suppose that you have C++ code like this: Your engine will crash on startup if init.lua is not found when your game starts (or contains errors). If this behavior is not suitable for your usecase, a custom handler function for resolving conflicting functions can be used by passing a function as an optional second argument. I would use them again if needed. Embedding Lua in Go there is no difference between functions defined is there a better way to do this? Lua has eight basic types: nil (undefined) boolean (boolean) number (numeric) string (string) -- Don't need the "%. WebLua programs can emit signals using the function call syntax. For instance, all library functions are written in C; You can easily print table contents with it: For example, Id recommend to avoid SDL/glfw/SFML bindings and writing them manually for the stuff you need. Link/Create testcases link for Module pages. While still largely relevant for later versions, there are some differences.The fourth edition targets Lua 5.3 and is available at Amazon and other bookstores.By buying the book, you also help to support the Lua project. --Aftab1995 (talk) 15:50, 23 May 2013 (UTC), I'm very happy to announce that Template:FlagiconLua has reached feature parity with Template:Flagicon! Where I see this is commonly done is in the templates which return links to the archives of talk pages. Can one call lua function that returns sevaral strings and pass them to a template? At the moment, we have three patterns in naming a module sandbox page: I suggest that is one too much. Johnuniq (talk) 06:53, 11 October 2013 (UTC), Doesn't Wikipedia's version of Lua allow the GetURL function (or equivalent)? For optional arguments the L.Opt(n int, default T) functions can be used. The downside is it will incur a small performance impact every time a new page of callframes is allocated. is just another way to write o.foo(o, x), Lori Baker - via Google. Calling the LValue.Type() returns the corresponding LValueType. mw:Extension:Scribunto/Lua reference manual#mw.title.makeTitle, en:Module_talk:String#Replication on other wikis, http://commons.wikimedia.org/wiki/Commons:Lua/Modules, Help talk:Template#Counting items in numbered list, WT:WikiProject Templates#Counting items in numbered list, Wikipedia:Help desk#Counting items in numbered list, betawiki:MediaWiki:Scribunto-common-error-category/bn, mediawikiwiki: Extension:Scribunto/Lua reference manual #table.concat, Bug 50329 - We need a common repository for Scribunto modules and templates, Template:Year in other calendars/testcases, Module talk:Sandbox/Johnuniq/grosstonnage, Wikipedia talk:Lua style guide#CodeEditor switched to tabs, submit code to implement a ulimit-like mechanism on Windows, Special:WhatLinksHere/3000 United States Census, mw:Extension:Scribunto/Lua_reference_manual#Returning_text, Module:Sandbox/iantresman/sandbox/archive/mw.recursive, User:Iantresman/sandbox/archive/mw.recursive, Special:PrefixIndex/User:Mr. Stradivarius, Help:Lua_for_beginners#Initializing_a_table, updating some Lua modules can cause 7 million pages to be reformatted, Template_talk:Convert#Deploying updates now 18,000x slower, Wikipedia:Miscellany for deletion/Wikipedia:Lua/To do, https://en.wikipedia.org/w/index.php?title=Wikipedia_talk:Lua/Archive_1&oldid=1137418039, Creative Commons Attribution-ShareAlike License 3.0.
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