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. Wnt thinks that the template should use the "style" type (with a yellow background), and I think it should use the "notice" type (with a grey background). Lua doesnt impose one style of writing code on you. It stays global and doesnt get collected by a GC until it has been set to nil. Can templates, MediaWiki pages or parser functions be called from Lua? Can someone make a nice SpecialPages adjustment? I didn't use Special:ExpandTemplates, though - I really did just forget my curly braces. 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'. You couldn't keep track of your old experiments, and my experience is that yes, I. Mr. Stradivarius talk 09:47, 11 November 2013 (UTC), I've updated Wikipedia:Lua/Modules/Overview using a Lua module to generate a table from various simple cut and paste data. ), You dont need a specialized IDE or tools to write Lua comfortably. Think of Lua scripts as functions - you can call them with require or do_file and they can return variables. And be especially careful when using coroutines. [feature X] (images/feature-x.png) Multi-MC Simulation -- Gets args.rowtype1, args.rowtype2, etc. 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? The reference manual for Lua 5.4s C API is here: https://www.lua.org/manual/5.4/manual.html#4, Github repo: https://github.com/ThePhD/sol2. For example like: frame.args.row1. L.DoString runs the Lua code in the VM. Hex (? Mr. Stradivarius talk 23:06, 1 January 2014 (UTC); Page moved without redirect. An expression like o:foo(x) What am I doing wrong? --Iantresman (talk) 00:06, 12 December 2013 (UTC). A fixed size callstack has the highest performance and has a fixed memory overhead. Thats basically all youll ever need to know about Lua. Gut feeling is usually wrong. Johnuniq (talk) 06:53, 11 October 2013 (UTC), Doesn't Wikipedia's version of Lua allow the GetURL function (or equivalent)? The returned integer defines how many return values has been pushed to the Lua stack. Page content can be retrieved with the getContent () method of the title object. Theyre mostly written in C/C++ and only expose a bunch of Lua functions/tables to the user. And finally, see what LVE and PICO-8 do. ]], "jo")' But there is a catch. Its neat. a find-and-replace Macro that lets you write code that acts like a function, without the function overhead running an external image to lua tool, so you can just stick the images in your Project folder, and automatically include them into your lua script every time you hit F7 ! sign in 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. Immediately afterward it gives you another line of codes which I have absolutely no idea where to insert it to make it functional at all. itch.io was written with it and it compiles to vanilla Lua. 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. Hence, for Lua, the alternative is to pass fewer parameters, but as strings of choices delimited by separator characters within each string. And to fetch an argument without conversion the L.Get(n int) function can be used. Best Mr. Stradivarius talk 10:42, 27 March 2013 (UTC), You've got it pretty much right. In Chapter 16 we will discuss such calls 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. Can one call lua function that returns sevaral strings and pass them to a template? All values in Lua can be stored in variables, used as arguments when calling functions, and returned as the result of their execution. Learn more. -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). --Iantresman (talk) 14:56, 12 December 2013 (UTC), --Iantresman (talk) 09:36, 13 December 2013 (UTC), Does our implementation allow Lua scripts access to whether the user is logged in or not? We could also use the template to automatically add Category:Lua-based templates to keep track of converted templates more easily. Does this apply if you are accessing the module from another Lua module, and not directly from a wiki page? First lets set up the environment and test that it works, start by install gopher-lua: Secondly lets create a minimal implementation: lua.NewState() creates our Lua VM, and it is though L (*lua.LState) we will interact with Lua in the future. Command line parameters, environment variables, and configuration files are common ways to change the behavior of software. Functions used by a Lua program can be defined both in Lua and They are iteration functions, so they add the overhead of a function call to each loop iteration. Thanks. OUR MISSION. This concept might be extended to support more than one memory location: I am trying to implement {{Horizontal timeline}} as a module. For example, check Special:WhatLinksHere/3000 United States Census. The docs are fantastic too. The simplest language I know. A language variable can contain values of any type. 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. Needs study to guarantee correctness! This came up over at Template talk:Historical populations. Is there a programme wizard who can help see if I've done something stupid? I'm currently using the following function to get template arguments. Exposing Go functions to Lua is essential to create custom a custom API. 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. lua.LVAsBool(v LValue) - Convert to bool, nil and false becomes false. Its a road map for learning Lua and my advice for how to integrate it with C/C++ code. Debresser (talk) 10:57, 8 December 2013 (UTC), Is the "Wikipedia namespaces" infobox necessary top right? That overhead might be removed if we made save/restore a built-in operation in Lua. Functions can both carry out a specific task Should I return a sequence of hundreds of strings relying on Scribunto in concatenating it? The typecheck function could also store away the type info for later introspection. ), The disadvantage of course is that bugfixes in modules like Redirect don't get passed on. The function is followed by the arguments, in order. Calling Lua code is done through L.CallByParam, which takes a parameters object, P, and arguments as variadic parameters. in Lua and functions defined in C. As we have seen in other examples, You can write entire games in Lua without ever touching C/C++. is there a better way to do this? and expressions in Lua. (and object-oriented programming) in more detail. lua.LVAsString(v LValue) - Converts LString and LNumber to string. NeoVim, which uses Lua scripts for user script code. Right now I'm putting ratings on the documentation subpages, which I think is what someone suggested before at one point for categories. Have there been any major incidents yet? I measured the overhead of direct and virtual C++ function calls on the Xenon PowerPC some time ago. John Victor - via Google, Very nice owner, extremely helpful and understanding --Iantresman (talk) 13:14, 8 December 2013 (UTC). I'd like to include some of the functionality of module:Page in my module, without having to reinvent the wheel. See the demos and more details at WikiProject Flag Template. That is partly about performance but mostly about engine architecture. :) Wnt (talk) 02:58, 6 January 2014 (UTC). 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. 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. after imported i find error in article with this Category:Pages with script errors. Older versions of Lua created empty tables with some pre-all ocated slots (four, if I You can learn about how to use Lua C API here (or in the latest version of Programming in Lua) - the online version is written for Lua 5.1 and some things have changed since 5.1, but most concepts have stayed the same. The process was smooth and easy. Easy to start using, the interface is user friendly and feels similar to C++ standard library. To get the perf bit Text formatting (bold, italics) breaks when the ''/''' tags are not closed for each argument. I used their packing and moving service the first time and the second time I packed everything and they moved it. Please don't take those *personal* suggestions as a criticism to Wikipedia:Lua. 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). 2000 If you create a local object inside the coroutine and store the reference to it in C++. -Wikid77 (talk) 12:07, 24 March 2013 (UTC). :) Wnt (talk) 08:16, 20 November 2013 (UTC), Can Lua take the contents of a Wiki page, and reprocess it? WebBut when you create thou sands of small tables, the combined overhead can be signic ant. This is a matter of implementation of the compiler or runtime (and its options) and cannot be said with any certainty. My own modules populate only the pre-alpha and alpha categories, but there are some here which I know have reached the other levels. try: with open("foo.txt") as f: Now you dont need to ship this init.lua with your binary and life becomes easier. Perhaps li in a list or tr in a table? thank you. This can result in slow compilation times, unreadable error messages and some interfaces are not that friendly (e.g. Since Lua has lexical scope at the block level rather than the function level, this works similarly to the way Python calls __exit__. lua.CanConvToString(v LValue) - True if LString or LNumber. The problem with 3rd party bindings is that they usually tend to get unmaintained or only support a specific version of the library. 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). 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. Most of the time, you only need one Lua state (lua_State in Lua C API and sol::state in sol2) for everything. :P Anyway, I have taken that idea and added some parameter checking and some documentation, and called it Module:User:Mr. Stradivarius/PrefixIndex. 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. The fact that even an IP user may edit the module namespace suggests that it must be really stable and secure. DePiep (talk) 23:55, 21 May 2015 (UTC). You dont need to compile Lua code, which means that you can change parts of your program/game logic without recompiling and even without reloading your program.