Toohool (talk) 17:18, 27 March 2013 (UTC), I have another related question. 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. They have lots of options for moving. The downside is it will incur a small performance impact every time a new page of callframes is allocated. I'm a rookie! Johnuniq (talk) 02:22, 25 June 2013 (UTC). The Lua version has some differences from the current template, so I would like to get others' comments before making the switch. These timings are likely different on different processor What to write in C++: collision detection, path finding, physics, renderer and other things that are performance critical. 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. If nothing happens, download GitHub Desktop and try again. Hence, for Lua, the alternative is to pass fewer parameters, but as strings of choices delimited by separator characters within each string. if u can help me)I imported Module:Citation, Module:Citation/CS1/Configuration, Module:Citation/CS1 in bn.wikipedia. The same can be said about making your program expandable with plugins. Right now I'm putting ratings on the documentation subpages, which I think is what someone suggested before at one point for categories. Everyone took really good care of our things. 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. that is, to call o.foo adding o as a first extra argument. to use Codespaces. It relies on Module:Sandbox/QuimGil/Flagicon, which provides the logics, and Module:Sandbox/QuimGil/FlagTranslations, where the flags data is stored. However, after writing up Module:Hex, which hex dumps the contents of strings, I was looking at the talk page when I noticed that the hex-dump of the contents of a strip marker (the example with UNIQ QINU) are changing every single time I hit the Talk tab or browser reload button to reload the page, even when I'm completely logged out with scripts disabled! John Victor - via Google, Very nice owner, extremely helpful and understanding --Rotpunkt (talk) 13:50, 9 January 2014 (UTC), mediawikiwiki:Extension talk:Scribunto/Lua reference manual #Example for string.format? I would have been able to continue contributing to these and other interesting templates. Is there a programme wizard who can help see if I've done something stupid? The LState is needed for interacting with the Lua VM, most commonly for retrieving function arguments. There are some practical functions to convert and check lua.LValue objects. Timing Lua Code Correctly in OpenResty To maintain similarity with other sandbox pages (in template space and user space), I propose: If we agree on this, we can encourage/discourage patterns. itch.io was written with it and it compiles to vanilla Lua. For example, Module:Navbar contains the code: In what case would frame not be equal to mw.getCurrentFrame()? That is partly about performance but mostly about engine architecture. 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). Casey Moving Systems is family owned and has been servicing Northern California for over 25 years. Is there a way to obtain a list (array) of all pages with a prefix (e.g. For example, I might want to process the posts on a talk page, and add some extra formatting. Also, your feedback here about the best way to organize the data is also welcome. 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. Unfortunately, I have not yet been able to think of a way to mix this logic to get what I want, namely a way to control whether results are updated daily or weekly, etc., because I haven't thought of a way by which the logic of whether time has passed will always be evaluated but the logic of the page content will not be, unless the time has come, at which point the caching should be updated on that page. I would welcome comments, and if people think the scheme is OK, please consider rating your modules Wnt (talk) 23:31, 16 April 2013 (UTC), I have opened a discussion here: en:Module_talk:String#Replication on other wikis. 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. Text formatting (bold, italics) breaks when the ''/''' tags are not closed for each argument. Its a road map for learning Lua and my advice for how to integrate it with C/C++ code. The function is followed by the arguments, in order. A cross between resources, documentation, and useful links. They are iteration functions, so they add the overhead of a function call to each loop iteration. In Module:Sidebar, I extended the boilerplate further to allow a third way, invoking the module from a template and passing args in explicitly (instead of using whatever args were passed to the template), like {{#invoke: Navbar | arg1 = foo | arg2 = bar}}. Passing just 1,000 parameters run about 1 second, and splitting 6,000 into 61,000 groups could process all 6,000 within 6 seconds, rather than 27. These snippets of Python and Lua are roughly equivalent. Example: L.GetTop() returns the number of arguments that was used when the function was called. This is a matter of implementation of the compiler or runtime (and its options) and cannot be said with any certainty. Thank you for your attention!--Qgil (talk) 21:16, 2 July 2013 (UTC), I created Module:Testcase table, and it seems to work pretty well (see the current transclusions). The docs are fantastic too. Extra arguments are thrown away; 1 time resty -e '' We can see theres overhead of about 11 milliseconds on this machine. Many 3rd party Lua libraries usually work with Lua 5.2/5.3/5.4. In brief, the categories I set up were pre-alpha, alpha, beta, release, and protected. E.g. I don't think it was really a active decision. thank you. For example, Module:User:Mr. Stradivarius/sandbox2 produces the right result when used via invoke from User:Mr. Stradivarius/Sandbox, but when I use the code = p.test() in the debug console I get the error "Lua error at line 4: attempt to index local 'frame' (a nil value)." Functions can both carry out a specific task To simplify comparisons, when comparing metadata the following can always be assumed to be true: From this data or according to any other criteria, the handler function should resolve the conflict by returning the value that should be written to the conflicted key. A complete example looks like this: The LState defines some convenience functions, in the example above we are using L.ToInt(1) to fetch the first function argument. -- The parentheses remove the "number of changes" returned by gsub. Can one call lua function that returns sevaral strings and pass them to a template? --Iantresman (talk) 00:06, 12 December 2013 (UTC). --Iantresman (talk) 13:14, 8 December 2013 (UTC). 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. I just quickly sorted out the present Lua modules to Wikipedia:Lua/Modules/Overview. Lua Performance Tips I would use them again if needed. 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. 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. 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 ! This code is OK (calling C++ from Lua is cheap): This code is not that good (calling Lua from C++ is slow): Profile first. All values in Lua can be stored in variables, used as arguments when calling functions, and returned as the result of their execution. For optional arguments the L.Opt(n int, default T) functions can be used. Ive used LuaDists CMake build scripts for Lua for many years, but LuaDist authors have stopped supporting newer Lua versions. Its simple. Isnt it great? 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. You signed in with another tab or window. Greetings Stephan Kulla (talk) 15:54, 19 May 2013 (UTC), (Sorry for writing here. It behaves somewhat like a stack as in [Forth] but with one element. I was just trying to return those hex tables via loadData and seem to have run into a nasty surprise. I am trying to create a weblink by concatenating 2 strings and by avoiding the display of the full link in an infobox. 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 redis instance enables the script to interact with the Redis server that's running 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). We now have the /doc system somewhat integrated/forced trough the Scribunto extension. 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'});. how can i do this (on which module, i find this Category for translation). And finally, see what LVE and PICO-8 do. 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. For example, check Special:WhatLinksHere/3000 United States Census. ", [ [\w+\. Lua - Functions - TutorialsPoint Mr. Stradivarius talk 16:45, 29 March 2013 (UTC), I decided to implement a Lua replacement for the innards of {{Repeat}} as a learning project for my first Lua module. These functions does not throw errors, but will return Go default values if conversion is not possible. 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 function signature must match what you passed in. WebBut when you create thou sands of small tables, the combined overhead can be signic ant. I measured the overhead of direct and virtual C++ function calls on the Xenon PowerPC some time ago. try: with open("foo.txt") as f: You can find Luas reference manual here. For example, it is not printing the string "mw.site.currentVersion", and only two "mw.site.stats" table rows, which might suggest it is not recursing properly, or perhaps something else. Of course, the specific delay depends on server load, but follows the general exponential slowdown formula, where 7,000 parameters is far slower than a linear extension of 7000/6000 or 17% slower, and runs closer to 47 seconds (+70% slower) rather than 27+17%=31.6 seconds. What can I do to increase the performance of a Lua There are still a few things I'm not sure about, though. -Wikid77 (talk) 12:07, 24 March 2013 (UTC). 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. Wnt (talk) 15:56, 6 January 2014 (UTC). !) 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. It Is Me Here t / c 15:08, 3 September 2013 (UTC). sign in Johnuniq (talk) 22:58, 10 January 2014 (UTC). as it does in a multiple assignment: The easy part is 'getting rid of the function name': assuming p is the variable in the last line of the program, just say, However, I see no way to get rid of the pipe - it. ), You dont need a specialized IDE or tools to write Lua comfortably. lua.CanConvToString(v LValue) - True if LString or LNumber. Felicia Hagler - via Google, In the middle of a big move and so far Jay Casey has been immensely helpful to us with all the details! An expression like o:foo(x) Please comment over there if you're interested. If you used classes as globals (which Ive seen in many tutorials and real code), you might have a script like this: Suppose that you didnt execute some_class.lua first (which defines a global SomeClass). For instance, consider the following function, to increment a global counter. This function has 1 as its default argument; that is, the call incCount (), without arguments, increments count by one. When you call incCount () , Lua first initializes n with nil ; the or results in its second operand; and as a result Lua assigns a default 1 to n . --Iantresman (talk) 14:50, 8 December 2013 (UTC). 1 time resty -e 'ngx.re.find ("hello, world. Using the L.CheckTypes function equate to checking the type manually and then calling L.TypeError(n int, message string) if there is an error. Providing global relocations solutions, storage and warehousing platforms and destruction plans. Thank you. Calling Lua code is done through L.CallByParam, which takes a parameters object, P, and arguments as variadic parameters. -DePiep (talk) 23:30, 19 July 2013 (UTC), Do Module:WikiLink and voy:ru::Wikilinks effectively aim to do the same thing? Requires all Lua files in a given directory. Fantastic help. --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. 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? --Rotpunkt (talk) 12:35, 1 May 2013 (UTC), Hello, I'm wondering if there is currently a module that counts elements on a page. For instance, all library functions are written in C; 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. You can divide up your code into separate functions. It has a GNU Make build, so building it is easy. See the demos and more details at WikiProject Flag Template. Calls the concat function with the arguments Go and Lua and prints the resulting string to stdout. -Wikid77 (talk) 19:29, 22 March 2013 (UTC), When moving a module there is no redirect left behind and existing invocations should be fixed. --Vriullop (talk) 11:07, 22 March 2013 (UTC). Page contents not supported in other languages. Download the official Lua source code here: https://www.lua.org/download.html. (what is sometimes called procedure You can call a function with a number of arguments different from 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. For example: Instead I need to output: "0.00001 1.2 3". 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 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. A Go function should implement the LGFunction type to be callable from Lua. At the moment, we have three patterns in naming a module sandbox page: I suggest that is one too much. Calling JavaScript If you need a debugger, I recommend checking out. The parameters object takes three important parameters: Fn - the lua.LFunction to call Nret - The number of returned values Protect - If protect is true an error is returned, otherwise a panic will occur. 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 I did not see any mention of this in the tutorial.--greenrd (talk) 10:04, 19 October 2013 (UTC), I've started up a new discussion about this at Wikipedia talk:Lua style guide#CodeEditor switched to tabs. The less data is shared between C++ and Lua, the better. Within C and C++, some comp is just another way to write o.foo(o, x), WebThe Redis Lua execution context always provides a singleton instance of an object named redis . Hopefully this will be semi-useful again. 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). We are proud to provide our customers with these services and value by trained professionals. Please let me know your thoughts over at Template talk:Pagetype#Module:Pagetype. its number of parameters. --HectorMoffet (talk) 11:05, 29 December 2013 (UTC). WebFunctions used by a Lua program can be defined both in Lua and in C (or in any other language used by the host application). Given an instance myqobject of this class, a Lua program can emit signal mysignal as follows 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. 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! now i wanted to translate Category:Pages with script errors in bn language. Needs study to guarantee correctness! -- Don't need the "%. 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"). There is no reason to do it for functions which are already 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++. Command line parameters, environment variables, and configuration files are common ways to change the behavior of software. With your own bindings, you can control what version you use and how the exposed API looks in Lua. lua lua.LVAsBool(v LValue) - Convert to bool, nil and false becomes false. -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). laura lehn - via Google, I highly recommend Mayflower. d Throughout the post L will denote a pointer to lua.LState. It receives a *lua.LState and returns an integer. Otherwise false. However, sometimes that is just not enough and an embedded language can be the solution. If that is not possible: Please suggest an alternative method to implement it. --SocietyBox (talk) 02:26, 20 January 2014 (UTC). In the example bellow sayHello function is first defined, and then called in the second call to DoString. I didn't use Special:ExpandTemplates, though - I really did just forget my curly braces. Its much easier to test if something is non-nil or has a specific type/fields in Lua than in C++. 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). To learn Lua, read Programming in Lua by Roberto Ierusalimschy. Writing the code in it feels like writing pseudocode/prototyping. Is this the right place for Lua programming queries? The advantages are a) edits to Redirect to add irrelevant features don't lead to massive queue usage, b) Redirect doesn't have to be protected, and c) in case a required module isn't protected, you don't get confused and fool around with a module you think is in limited use only to find out that you've created a huge server load. If you only want to call some C/C++ functions from Lua (or some small Lua functions from C/C++) - use Lua C API. For instance, all library functions are written in C; Hex (? If anyone could help me to work this out I'd be very grateful. Our compilation still gets rid of the run-time My own modules populate only the pre-alpha and alpha categories, but there are some here which I know have reached the other levels. Are you sure you want to create this branch? This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Plastikspork (talk) 22:08, 2 November 2013 (UTC), I've created Module:Pagetype, a replacement for {{pagetype}}, and I am thinking of updating the template to the Lua version later on this week. That would only apply to your contributions though, not to later modifications made by other editors. 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'. Embedding Lua in Go Does someone have an idea how to code this feature? 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. Calling Lua Functions - Game Dev Geek
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