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. Our compilation still gets rid of the run-time Hex (? 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'. Is there a way for a loadData table to contain these keys? Cya. 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. 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? The returned integer defines how many return values has been pushed to the Lua stack. The overhead of a virtual function call was 13.2 nanoseconds, or 42 clock cycles, compared to inline. is there a better way to do this? The problem with 3rd party bindings is that they usually tend to get unmaintained or only support a specific version of the library. Support for calling a parser function is coming soon with frame:callParserFunction, or you could do it today by passing the markup to frame:preprocess. Otherwise false. --Iantresman (talk) 14:50, 8 December 2013 (UTC). All rights reserved. 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. And to fetch an argument without conversion the L.Get(n int) function can be used. You couldn't keep track of your old experiments, and my experience is that yes, I. 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. The redis instance enables the script to interact with the Redis server that's running It is superfluous if you only call the function once within the scope of the local variable, but that is pretty rare. You can even create small domain specific languages thanks to Luas syntax sugar. :) Wnt (talk) 08:16, 20 November 2013 (UTC), Can Lua take the contents of a Wiki page, and reprocess it? / 1 time resty -e 'ngx.re.find ("hello, world. 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. I've created a new request page for Lua scripts at Wikipedia:Lua requests. Hex (? its hard to know if what youre passing to Lua will be copied or passed by a reference). that is, to call o.foo adding o as a first extra argument. -Wikid77 (talk) 12:07, 24 March 2013 (UTC). For example: Instead I need to output: "0.00001 1.2 3". Although Lua can still process the 6,000 parameters, to compare choices, within "0.02" Lua seconds, the load time of the #invoke interface is 27 seconds. after imported i find error in article with this Category:Pages with script errors. There is still lots of work to do of course, But it's a start TheDJ (talk contribs) 22:18, 18 March 2013 (UTC). John Victor - via Google, Very nice owner, extremely helpful and understanding but this fact has no relevance to Lua programmers. Because it makes it much easier to track dependencies between various script files and makes them load each other when theyre needed. With your own bindings, you can control what version you use and how the exposed API looks in Lua. the colon operator. Its simple. Page contents not supported in other languages. GitHub It may sound like asking to be babysat or spoon-fed, but I'm totally stuck. The simplest language I know. A language variable can contain values of any type. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Fantastic help. You can call a function with a number of arguments different from try: with open("foo.txt") as f: 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 ! Thanks! Thanks. Writing the code in it feels like writing pseudocode/prototyping. 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. However, the basic API is quite simple, and the advanced features deserves its own post. I'd like to include some of the functionality of module:Page in my module, without having to reinvent the wheel. Relevant to Lua, userscripts, and user scripting generally. 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. It Is Me Here t / c 15:08, 3 September 2013 (UTC). Makyen(talk) 04:02, 8 May 2014 (UTC), I've heard for quite a while that the Lua scripts only run when the page is parsed, which rules out many interactive features but is efficient. Toohool (talk) 17:18, 27 March 2013 (UTC), I have another related question. Can templates, MediaWiki pages or parser functions be called from Lua? On each conflict, this function will be passed the conflicted key, the current value that load() is attempting to save, the value that is currently stored in the conflicted key, and a table of metadata consisting of the following: Please note that these keys are created and updated automatically by load() and should not be altered manually. --Iantresman (talk) 00:06, 12 December 2013 (UTC). The docs are fantastic too. with nil arguments removed. is just another way to write o.foo(o, x), Hence, for Lua, the alternative is to pass fewer parameters, but as strings of choices delimited by separator characters within each string. See discussion at Village Pump (policy)#Protection and management of scripts?. 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. Automatic transclusion of protection templates was added. While running tests to simulate a large #switch function of 3,000 branches, I repeatedly confirmed how passing thousands of parameters is typically exponentially slower beyond the first 500 parameters. Wikipedia talk:Lua/Archive 1 This first edition was written for Lua 5.0. I used their packing and moving service the first time and the second time I packed everything and they moved it. If you wish to retain the metadata for logging or other purposes, the entire metadata table is returned as the third return value from load(), containing the metadata for every key that was operated on (including those with no conflicts). I'm a happy user of this space myself with the pet projects I develop in my free time. 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. :P Anyway, I have taken that idea and added some parameter checking and some documentation, and called it Module:User:Mr. Stradivarius/PrefixIndex. To get the perf bit out of the way: the bridging code between C++/Lua has overhead compared to just calling Lua from Lua or calling C++ from C++. Ive written many articles about using Lua with C++ on my old blog many years ago. The sandbox Wiki code {{Special:AllPages|namespace=666}} {{CURRENTTIMESTAMP}} returns a timestamp that changes each time the page is reloaded, because caching is disabled. In this case we will embed Lua using gopher-lua. The second clause supports a simple way to invoke the function from another module (such as from Module:Navbox), or from the debug console: Navbar.navbar({arg1 = 'foo', arg2 = 'bar'});. (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. (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? Reinterpreting The Lua Interpreter | Hackaday Makyen (talk) 05:58, 1 January 2014 (UTC), That makes sense. ?0" here but useful if omit above. Functions are the main mechanism for abstraction of statements Work fast with our official CLI. initialized with the actual arguments given in the function call. Servicing Northern California For Over 25 Years, Select The Service Your Interested InDocument ShreddingRecords ManagementPortable StorageMoving ServicesSelf StorageOffice MovingMoving Supplies. Can Lua scripts access the username of the logged in user? If that is not possible: Please suggest an alternative method to implement it. 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. Given an instance myqobject of this class, a Lua program can emit signal mysignal as follows Johnuniq (talk) 02:22, 25 June 2013 (UTC). The LState is needed for interacting with the Lua VM, most commonly for retrieving function arguments. The Lua version has some differences from the current template, so I would like to get others' comments before making the switch. 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:}}. An auto sizing callstack will allocate and release callstack pages on demand which will ensure the minimum amount of memory is in use at any time. Should I return a sequence of hundreds of strings relying on Scribunto in concatenating it? Calling JavaScript What is the equivalent of {{fullurl:page name}}? 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. Download the official Lua source code here: https://www.lua.org/download.html. for example, make this work without copying the args to a new table? What am I doing wrong? ]], "jo")' But there is a catch. It would be a bit odd. And be especially careful when using coroutines. To iterate a table, instead use for k=1, #tbl do local v = tbl [k]; It does exactly the same without the function call overhead (pairs actually returns another function which is then called for 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. in the second case, we use it as an expression: Lua also offers a special syntax for object-oriented calls, Calling the LValue.Type() returns the corresponding LValueType. Your life will be easier if you have a small C/C++ API. to use Codespaces. 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. You can find Luas reference manual here. Objects implementing this interface are LNilType, LBool, LNumber, LString, LFunction, LUserData, LState, LTable, and LChannel. Your opinions on the matter are welcome; please participate in the discussion by adding your comments at Wikipedia:Miscellany for deletion/Wikipedia:Lua/To do and please be sure to sign your comments with four tildes (~~~~). 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. -Wikid77 (talk) 19:29, 22 March 2013 (UTC), When moving a module there is no redirect left behind and existing invocations should be fixed. thank you. WebThe Redis Lua execution context always provides a singleton instance of an object named redis . 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. 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. and expressions in Lua. 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. 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. may be relevant to this problem. Gut feeling is usually wrong. Given that each {{#ifexist:}} is an expensive parser function (EPF), these templates can consume an excessive number of EPFs. 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"). In our C++ file, we need to define the consoleLog function that it will receive from JavaScript. [feature X] (images/feature-x.png) Multi-MC Simulation The parser seems to reject any effort to initialize a table in the return statement if one of the indexes is, or could be, interpreted as a number. See the explanation on how to do concurrency in Lua in sol2 here (especially about lua_xmove and sol::main_object). 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. So its better to do it on Lua side, unless you make a C++ API which has to accept tables for ease-of-use - then you dont have much choice (but you can still wrap them into Lua functions and call C++ function internally). 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). However, sometimes that is just not enough and an embedded language can be the solution. However, in the example where SomeClass is returned as a local variable, you wont need to do this - if you just load the script.lua, it would execute some_class.lua when you call require (it would only do this if another script didnt call it, otherwise it would return a cached SomeClass variable). Dont put too much code into one script - its easy to separate everything into smaller scripts. Lua 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. 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. I'd rather see useful LUA links. Calls the concat function with the arguments Go and Lua and prints the resulting string to stdout. Snipre (talk) 07:52, 31 October 2013 (UTC), Is there a LUA method for '#ifexist' that doesn't generate false incoming links? now i wanted to translate Category:Pages with script errors in bn language. The price they quote you is guaranteed and if your load comes in on the scales below the pounds they quote you they will refund you the difference you paid.