Hex (? Or is it something else? The parameters object takes three important parameters: The following code defines a concat function in Lua. Its a good starting point for making your own CMake build for Lua, though (or if you use older versions of Lua, they work well). Theyre mostly written in C/C++ and only expose a bunch of Lua functions/tables to the user. What to write in C++: collision detection, path finding, physics, renderer and other things that are performance critical. 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. And finally, see what LVE and PICO-8 do. 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. You can do procedural, functional, OO programming. I see that I can access Mediawiki libraries as simple as "mw.stat", are modules on Wikipedia accessible as easily? 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? 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. You can divide up your code into separate functions. Integrating it with CMake is somewhat trickier. lua.LVAsBool(v LValue) - Convert to bool, nil and false becomes false. WebThe Redis Lua execution context always provides a singleton instance of an object named redis . 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 Please in Lua and functions defined in C. As we have seen in other examples, --HectorMoffet (talk) 11:05, 29 December 2013 (UTC). lua.LVAsString(v LValue) - Converts LString and LNumber to string. Johnuniq (talk) 22:58, 10 January 2014 (UTC). 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. 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. ]], "jo")' But there is a catch. An expression like o:foo(x) The resty command itself has a startup and exiting overhead. The overhead of a virtual function call was 13.2 nanoseconds, or 42 clock cycles, compared to inline. 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. WebLua Functions - A function is a group of statements that together perform a task. Casey Moving Systems is family owned and has been servicing Northern California for over 25 years. The function signature must match what you passed in. Makyen, does that look something like what you wanted? A fixed size callstack has the highest performance and has a fixed memory overhead. ", [ [\w+\. What I'm trying to do is much more complicated, see Module:Convert/makeunits, but is the same issue. (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? Isnt it great? Lua has eight basic types: nil (undefined) boolean (boolean) number (numeric) string (string) What should I do to return a large text built from numerous smaller elements? Any suggestion on how to receive this parameter template as a table rather than a substituted string? ), You dont need a specialized IDE or tools to write Lua comfortably. Is there a programme wizard who can help see if I've done something stupid? This was possible because the wikimarkup language was very intuitive, and easy to understand even for the layman. 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. We have a lot of cases where related modules have the same name with "/" to indicate subpages, and some others where apparently related modules simply extend a name. --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? Will your logo be here as well?. This doesn't, which I was hoping would be equivalent: And, how do I do the reverse, and convert mw.site.currentVersion to the string "mw.site.currentVersion"? Example: L.GetTop() returns the number of arguments that was used when the function was called. However: This overhead may be trivial compared to what the body of You can download the latest release manually and include it in your project, or you can install it in your project directory through Luvit's package manager Lit, using the install command. I've been trying to use some of the other frame functions, and I can get them working via #invoke, but not through the debug console. Calling JavaScript A Go function should implement the LGFunction type to be callable from Lua. - basically everything else that doesnt interact with low-level OS APIs much. And be especially careful when using coroutines. 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. Ultimately MediaWiki should issue another tutorial for Wikipedians (without prior knowledge of C and Lua) due to the differences from standard Lua. [feature X] (images/feature-x.png) Multi-MC Simulation is there a better way to do this? Lua is a language with implicitly dynamic data types. The documentation toolbox does not yet know about Module testcases (though the editnotice 'sort of' does). Enrique Garca Cota has a lot of great articles about Lua: http://kiki.to/. 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). How much do function calls impact performance? It would be a bit odd. For example, Module:Navbar contains the code: In what case would frame not be equal to mw.getCurrentFrame()? One of the most versatile and used data structures in Lua is LTable (actually it is the only one). I am a repeat customer and have had two good experiences with them. GitHub - Samur3i/direct-loader: Requires all Lua files in a 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. Our areas of expertise include Commercial Moving Services, Warehousing, Document Shredding and Storage Solutions. Wnt (talk) 23:14, 21 March 2013 (UTC), I have run many timing tests, to compare using shell templates which contain #invoke versus direct use of {#invoke:}, and for tiny templates, such as string-handling functions, the template versions often ran upto 50% slower than direct #invoke of each tiny Lua function. :) Wnt (talk) 02:58, 6 January 2014 (UTC). 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. I very much regret that. Preceding unsigned comment added by Ryn78 (talk contribs) 03:27, 13 October 2013 (UTC), Is it possible for a module to invoke another module? Updated link. Lua doesnt impose one style of writing code on you. Installation You can download the latest release manually and include n XLua Documentation - Taloncrossing 2000 Vanilla Lua, the latest version, otherwise. --Iantresman (talk) 14:50, 8 December 2013 (UTC). A cross between resources, documentation, and useful links. its hard to know if what youre passing to Lua will be copied or passed by a reference). There are a number of To(n int) functions available. Providing global relocations solutions, storage and warehousing platforms and destruction plans. Clearly it's worth thinking about ways to reduce this impact as much as possible. Perhaps li in a list or tr in a table? John Victor - via Google, Very nice owner, extremely helpful and understanding !) 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. I am trying to implement {{Horizontal timeline}} as a module. 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. that is, to call o.foo adding o as a first extra argument. lua If you're a Lua developer, please watchlist it. itch.io was written with it and it compiles to vanilla Lua. Hence, for Lua, the alternative is to pass fewer parameters, but as strings of choices delimited by separator characters within each string. Also explains why the uselang=qqq hack doesn't work to show the scribunto messages. : Overusing them makes code harder to understand because now you need to make sure that the object youre are pointing to doesnt change unexpectedly. Because it makes it much easier to track dependencies between various script files and makes them load each other when theyre needed. Even if you do, with LuaJIT youll be able to achieve C/C++ level performance. The LTable type can be used for emulating namespaces and classes. 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 Think of Lua scripts as functions - you can call them with require or do_file and they can return variables. Then, executing script.lua would resullt in an error: SomeClass is nil. the results which can be obtained by a user with the Special:PrefixIndex page)? 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. The value of any of these keys will never be. 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. Learn more. Thank you. Caution is desirable because it is very confusing for anyone reading the code later if tostring() does not do what it normally does, however the following is the idea. I don't think it was really a active decision. See the demos and more details at WikiProject Flag Template. In this case we will embed Lua using gopher-lua. Use Git or checkout with SVN using the web URL. You can even create small domain specific languages thanks to Luas syntax sugar. Wnt (talk) 15:56, 6 January 2014 (UTC). Lua Performance Tips It stays global and doesnt get collected by a GC until it has been set to nil. Do I need to use %f and remove the trailing zeros with string.match or string.gsub? 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. I would generally recommend to avoid making high volume calls into Lua. Lua Village Pump (policy)#Protection and management of scripts? With your own bindings, you can control what version you use and how the exposed API looks in Lua. -- Gets numbers for row1, row2, etc. Hence, passing 2,000 parameters runs 3 seconds, 4,000 parameters runs 13 seconds, or 6,000 parameters run 27 seconds.
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