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. -- Sameboat - (talk) 04:26, 19 March 2013 (UTC). 2015 Nils Lagerkvist. 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. ], So templates can call Lua modules, parser functions and pages in MediaWiki namespace. 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. 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. However, if we standardize this, with the names copied verbatim and the fairly distinctive capital letter after the /, it should be easy to have a bot notify the author(s) of Module:Submit an edit request automatically when Redirect is updated. Long story short, the overhead of a direct (non-virtual) function call was approximately 5.5 nanoseconds, or 18 clock cycles, compared to an inline function call. The overhead of a virtual function call was 13.2 nanoseconds, or 42 clock cycles, compared to inline. These timings are likely different on different processor families. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. How you divide up your code among different We now have the /doc system somewhat integrated/forced trough the Scribunto extension. ", [ [\w+\. Should I return a sequence of hundreds of strings relying on Scribunto in concatenating it? The fact that even an IP user may edit the module namespace suggests that it must be really stable and secure. Many 3rd party Lua libraries usually work with Lua 5.2/5.3/5.4. may be relevant to this problem. 3 Command line parameters, environment variables, and configuration files are common ways to change the behavior of software. lua.LVAsString(v LValue) - Converts LString and LNumber to string. 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. Embedding Lua in Go I'd rather see useful LUA links. lua It is superfluous if you only call the function once within the scope of the local variable, but that is pretty rare. --Iantresman (talk) 13:14, 8 December 2013 (UTC). Now, with this new LUA language, template editing is becoming more and more the domain of technicians. 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. They are iteration functions, so they add the overhead of a function call to each loop iteration. is there a better way to do this? Often the linked module contains bells and whistles that aren't really necessary; why not bring it into the module and slim it down? that is, to call o.foo adding o as a first extra argument. In Chapter 16 we will discuss such calls But what I'd like to ask now is: as a matter of general policy, does it ever make sense to link from a module that is in such widespread use that it needs to be protected to the current copy of another module? 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. 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. The docs are fantastic too. This came up over at Template talk:Historical populations. Hence, passing 2,000 parameters runs 3 seconds, 4,000 parameters runs 13 seconds, or 6,000 parameters run 27 seconds. That way it would be obvious straight away which templates have been converted, and would help advertise the fact that we have this neat new programming language available and that we need people to convert existing templates over. To get automatic errors the L.Check(n int) family of functions can be used; They throw a Lua error if the type check fails. 1 time resty -e '' We can see theres overhead of about 11 milliseconds on this machine. They have lots of options for moving. You just compile a bunch of C files, link with the library and youre ready to go - you dont need to rewrite half of your program/game or make your build script 10 times more difficult. 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 Result #3 works correctly. --HectorMoffet (talk) 11:05, 29 December 2013 (UTC). Easy to start using, the interface is user friendly and feels similar to C++ standard library. for example, make this work without copying the args to a new table? FT2(Talk|email) 02:07, 20 March 2013 (UTC), I found this guide for learning how to code Lua, may be of help or use www.lua.org/pil/contents.html#P1, I feel like I must have reinvented the wheel here, but I copied Template:Tlx to Template:Mlx with minor modifications, so we can type, and get {{#invoke:ConvertNumeric|decToHex|99 33}}, It would be good if someone could look this over for any flaws before it gets cascade-protected by something. in the second case, we use it as an expression: Lua also offers a special syntax for object-oriented calls, These snippets of Python and Lua are roughly equivalent. However, the basic API is quite simple, and the advanced features deserves its own post. Writing code like this will become better with new #embed directive in future C/C++ versions, e.g. L.DoString runs the Lua code in the VM. Please Please let me know your thoughts over at Template talk:Pagetype#Module:Pagetype. Sandboxing is easy. In the example bellow sayHello function is first defined, and then called in the second call to DoString. 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:}}. Or is it something else? With those it's not entirely clear if they are meant to go together or not. Use Git or checkout with SVN using the web URL. --Aftab1995 (talk) 15:50, 23 May 2013 (UTC), I'm very happy to announce that Template:FlagiconLua has reached feature parity with Template:Flagicon! Frietjes (talk) 00:03, 4 July 2013 (UTC), At the moment we have the {{lua talk}} template to use on talk pages of templates converted to Lua. So tonight I put together Module:Unsubst, which can be used to do the same thing without all the limitations of {{unsubst}}. I see that I can access Mediawiki libraries as simple as "mw.stat", are modules on Wikipedia accessible as easily? There is no reason to do it for functions which are already The LState is needed for interacting with the Lua VM, most commonly for retrieving function arguments. If anyone could help me to work this out I'd be very grateful. 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. --Iantresman (talk) 18:29, 7 December 2013 (UTC), I used to be an above average template editor, making significant contributions to even such intricate template as Ambox and Fix. -Wikid77 (talk) 12:07, 24 March 2013 (UTC). I get an error message when I use it. :) Wnt (talk) 08:16, 20 November 2013 (UTC), Can Lua take the contents of a Wiki page, and reprocess it? Calls the concat function with the arguments Go and Lua and prints the resulting string to stdout. mw.site.currentVersion, mw.site.scriptPath, etc etc. 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? lua.LVIsFalse(v LValue) - Returns true if nil or false. All values in Lua can be stored in variables, used as arguments when calling functions, and returned as the result of their execution. Because the property from Wikidata is not updated by mw.message, I decided to try it on one of those pesky Special: pages that abolish caching. A tag already exists with the provided branch name. It may sound like asking to be babysat or spoon-fed, but I'm totally stuck. The less data is shared between C++ and Lua, the better. I didn't use Special:ExpandTemplates, though - I really did just forget my curly braces. For example, I might want to process the posts on a talk page, and add some extra formatting. The tutorial I actually want is how a template with parser functions translate into a Lua module with explanation of what syntax equal what variable/function or whatever. The same can be said about making your program expandable with plugins. With your own bindings, you can control what version you use and how the exposed API looks in Lua. See a simple example of how to build Lua with CMake and use it with sol2 here. It is also possible to make the function a parameter if it comes from a defined list of choices - just load up your data and set a loop that p[xyz] = function(frame) return p.main(frame, xyz) end. -- Sameboat - (talk) 07:07, 18 March 2013 (UTC), Thank Dragons flight for clearing something for me. I am a repeat customer and have had two good experiences with them. They have a great system for tracking your belongings and a system for checking to make sure you got all of your belongings once you arrive at your destination. 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). ), You dont need a specialized IDE or tools to write Lua comfortably. For variety, and to match the fact that if you know what values you are dealing with you might have some "ifthenelse" statements to handle them, I did the format slightly differently. Lua - Functions - TutorialsPoint The approach of Module:Sandbox - having every user put scripts into a common receptacle - seems unworkable. Think of Lua scripts as functions - you can call them with require or do_file and they can return variables. Running the Go code will yield: To run a Lua file, instead of a string, call lua.DoFile, DoFile and DoString can be called several times, and thus it can be utilized to expose Lua function. n {{. !) 16:39, 24 February 2013 (UTC), the following code is arguably better than the current one;-) [Note: It also highlights more Lua features - assertion, type checking, local scoping, tail call recursion etc. 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"). 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). I was wondering if there is a way to improve the performance. Enrique Garca Cota has a lot of great articles about Lua: http://kiki.to/. To be sure, this is the strip marker for a current time function, but I'm thinking this is either a bug or a feature, and we should figure out which! What to write in Lua: gameplay logic, FSMs, cutscenes, etc. ]], "jo")' But there is a catch. 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. 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 --Iantresman (talk) 00:06, 12 December 2013 (UTC). For example, check Special:WhatLinksHere/3000 United States Census. 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. to use Codespaces. The LTable type can be used for emulating namespaces and classes. --Iantresman (talk) 11:31, 9 December 2013 (UTC), Can modules "call" other modules? You can divide up your code into separate functions. A Go function should implement the LGFunction type to be callable from Lua. --Rotpunkt (talk) 13:50, 9 January 2014 (UTC), mediawikiwiki:Extension talk:Scribunto/Lua reference manual #Example for string.format? How about expanding the template's function so that we can also put at the top of template /doc pages? 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). 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. Debresser (talk) 10:57, 8 December 2013 (UTC), Is the "Wikipedia namespaces" infobox necessary top right? --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? Do I need to use %f and remove the trailing zeros with string.match or string.gsub? Is these Lua performance tips still accurate? : r/lua - Reddit *, I'd like to find out which mw.site library options are available, and print their value, without having to specify each one individually, ie. In short, if your coroutine gets GCed and you hold the reference to this local variable as a sol::object on the C++ side, it wont prevent the variable from getting GCed by Lua and your program crashing because of that. thank you. WebIt's more terse, though at the expense of the function call overhead. Eg: {{example |row1 = {{template2|height=52}} }}, In the above exaple we can get row1 as frame.args.row1 but is it possible to get height from row1. Timing Lua Code Correctly in OpenResty 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. ), The disadvantage of course is that bugfixes in modules like Redirect don't get passed on. Snipre (talk) 07:52, 31 October 2013 (UTC), Is there a LUA method for '#ifexist' that doesn't generate false incoming links?
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