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. is just another way to write o.foo(o, x), 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. --Rotpunkt (talk) 12:35, 1 May 2013 (UTC), Hello, I'm wondering if there is currently a module that counts elements on a page. I wonder if there's any actually helpful tutorial for those already familiar with Wikisyntax but without other computer language experience like Lua or C. The tutorials I found usually begin with a simple code to tell you to copy-and-paste (hello, world) then look at the outcome. Thank you. 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). The function signature must match what you passed in. --Iantresman (talk) 11:31, 9 December 2013 (UTC), Can modules "call" other modules? Isnt it great? This came up over at Template talk:Historical populations. 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. 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. Village Pump (policy)#Protection and management of scripts? You can find Luas reference manual here. 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 Right now I'm putting ratings on the documentation subpages, which I think is what someone suggested before at one point for categories. thank you. I am trying to implement {{Horizontal timeline}} as a module. Everyone took really good care of our things. GitHub - Samur3i/direct-loader: Requires all Lua files in a Sorry if this was discussed before, but I did not find relevant links in a couple of minutes. The simplest way to time some Lua code is to use the time command with the resty command. A Go function should implement the LGFunction type to be callable from Lua. Now you dont need to ship this init.lua with your binary and life becomes easier. There is no reason to do it for functions which are already Can they be rewritten in Lua, perhaps? It is superfluous if you only call the function once within the scope of the local variable, but that is pretty rare. Programming in Lua : 5 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. 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. 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? With your own bindings, you can control what version you use and how the exposed API looks in Lua. Ive used LuaDists CMake build scripts for Lua for many years, but LuaDist authors have stopped supporting newer Lua versions. I think that this is less effective than it could be, however. Keep your global state to a minimum and variable scope as small as possible. WebBut when you create thou sands of small tables, the combined overhead can be signic ant. Wnt (talk) 15:56, 6 January 2014 (UTC). Dcoetzee 23:09, 23 February 2013 (UTC), There's a discussion at the technical pump currently about where to put code that you're experimenting with; as a result Module:Sandbox has been created. Given an instance myqobject of this class, a Lua program can emit signal mysignal as follows WebIt's more terse, though at the expense of the function call overhead. WebWe can disable all the type checking by switching a single variable, and no added overhead would remain when the functions are executed (though there is some slight added overhead when the functions are built). The syntax of the template sends another template as parameter. Technical 13 (talk) 12:12, 9 May 2013 (UTC). Embedding Lua in Go try: with open("foo.txt") as f: Relevant to Lua, userscripts, and user scripting generally. 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). -DePiep (talk) 23:30, 19 July 2013 (UTC), Do Module:WikiLink and voy:ru::Wikilinks effectively aim to do the same thing? I ran some local tests and it seems pretty easy to crash it, but then again I'm running it in an unstable environment anyway so it may not reflect how things work here on Wikipedia. The gopher-lua library operates on a interface called LValue. Please That is partly about performance but mostly about engine architecture. I would have been able to continue contributing to these and other interesting templates. I am trying to create a weblink by concatenating 2 strings and by avoiding the display of the full link in an infobox. 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. ], So templates can call Lua modules, parser functions and pages in MediaWiki namespace. Does mw.ustring.byteoffset work correctly with negative offsets? Updated link. I very much regret that. The NewPP parser hits the huge delays when passing 6,000 parameters whether to Lua, or to a template, or to a #switch parser function of 6,000 "|x=" branches. If you think that your game became slow because of Lua code, profile first before rewriting it in C++. Timing Lua Code Correctly in OpenResty 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). 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. Hex (? Calls the concat function with the arguments Go and Lua and prints the resulting string to stdout. d Theyre mostly written in C/C++ and only expose a bunch of Lua functions/tables to the user. -Wikid77 (talk) 12:07, 24 March 2013 (UTC). Lua 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. 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:}}. 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. for example, make this work without copying the args to a new table? 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"). Is these Lua performance tips still accurate? : r/lua - Reddit 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. Exposing Go functions to Lua is essential to create custom a custom API. powered by Hugo The body of the compiled Lua function consists of a series of function calls to the helper functions, one per instruction. The value of any of these keys will never be. 3 After the function call, 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. Is there a way to obtain a list (array) of all pages with a prefix (e.g. What should I do to return a large text built from numerous smaller elements? The LState is needed for interacting with the Lua VM, most commonly for retrieving function arguments. Calling the LValue.Type() returns the corresponding LValueType. Yes, you can replace built-in functions because they are simply functions accessed from global variables. for instance, Parameters work exactly as local variables, For example like: frame.args.row1. Dont forget that you can do this: Now, when you load/execute this script, you will only get one function as the result: All the internal script state will be hidden and non-modifable and wont overwrite any global state in your current Lua state, which is great. The first clause supports the case where the module is being invoked from a template as {{#invoke: Navbar | navbar}}. Is this a problem in my module or in Scribunto? For instance, all library functions are written in C; 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. Should I return a sequence of hundreds of strings relying on Scribunto in concatenating it? "factorial: argument must be a number >= 0", -- likely something like 1=foo=bar, we need to do it as a named arg. in the second case, we use it as an expression: Lua also offers a special syntax for object-oriented calls, The approach of Module:Sandbox - having every user put scripts into a common receptacle - seems unworkable.