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101. RE: Using index-event to call external function (score: 166)

Author: "Nick Trout" <nick@...>

Date: Tue, 22 Apr 2003 16:01:04 -0700

The following might work better. You can't quite just put "testObj.Hello" because Lua will think its an assignment. I put a dummy Hello function in your luaNET object. As Riki pointed out, __index ne

102. Re: How to check if table index exist (score: 162)

Author: Oliver Kroth <oliver.kroth@...>

Date: Mon, 18 Nov 2019 09:47:35 +0100

Hi, My favourite method is to add to the result a metatable whose __index function returns an empty table with exactly that same metatable attached, which can be the same predefined table for all cas

103. Re: Undefined variables returning nil (score: 162)

Author: William Ahern <william@...>

Date: Tue, 19 Mar 2013 17:52:27 -0700

Lua does a fine job of balancing verboseness and simplicity of its API. Some languages have a plethora of C APIs which do complex operations, others have very few operations which require laborious a

104. Re: cannot index a table loaded as a chunk (score: 159)

Author: Ben Sunshine-Hill <sneftel@...>

Date: Fri, 20 Aug 2004 01:52:04 -0700

I'm wildly guessing you're executing luaL_loadfile, but never executing the resultant chunk. A chunk is a function. That's all it is. Commonly, it's a function which happens to set a lot of global va

105. Re: cannot index a table loaded as a chunk (score: 159)

Author: "Michael Newberry" <mnewberry@...>

Date: Fri, 20 Aug 2004 01:33:23 -0700

Michael "static"

106. Using index-event to call external function (score: 159)

Author: Marco Kögler <marco.koegler@...>

Date: Tue, 22 Apr 2003 23:20:56 +0200

Hi! I've been tinkering a bit with Lua and C#. I'm trying to use the __index metatable event to re-route function calls to the C# side. My setup is like this: On the Lua-Side I have a 'handle' to a C

107. Re: Index table from string? (score: 159)

Author: "Milano Carvalho" <milanogc@...>

Date: Fri, 22 Mar 2002 18:40:14 -0300

Ok, I was silly in the last post... :) Milano

108. Re: How to check if table index exist (score: 155)

Author: Aidar Kamalov <aidar.kamalov@...>

Date: Wed, 20 Nov 2019 07:26:10 +0300

Thank you, Sergey ??, 18 ????. 2019 ?. ? 19:51, Sergey Kovalev <kovserg33@gmail.com>: function ats(a,def)     return function(...)         for _,v in ipairs(table.pack(...)) do             if type(a)

109. Re: How to check if table index exist (score: 155)

Author: Sergey Kovalev <kovserg33@...>

Date: Mon, 18 Nov 2019 18:51:26 +0200

function ats(a,def) return function(...) for _,v in ipairs(table.pack(...)) do if type(a)~='table' then return def end a=a[v] end return a end end Code = ats(ent,"201")(1,1,1,1) Status = ats(ent)(1,1

110. How to check if table index exist (score: 155)

Author: Aidar Kamalov <aidar.kamalov@...>

Date: Mon, 18 Nov 2019 08:42:24 +0300

Hello, I have a table generated by luasoap. function trackNum(tracknum)     local ns, meth, ent = client.call {         url = "" href="http://mysite/api/service.asmx">http://mysite/api/service.asmx",

111. cannot index a table loaded as a chunk (score: 155)

Author: "Michael Newberry" <mnewberry@...>

Date: Fri, 20 Aug 2004 01:29:16 -0700

I am using lus 5.0 and I have a strange problem with tables being used as classes. I define the class as a table. It has one variable inside.The scripthas a command that calls a Cfunction named Inclu

112. Re: Index table from string? (score: 155)

Author: "J. Perkins" <jason@...>

Date: Fri, 22 Mar 2002 15:32:23 -0500

No, I tried that and it gives an "attempt to index nil value" error. 'self' isn't valid inside the dostring block. Jason function Registry:getValue(key) return dostring("return self." .. key) end

113. Re: Undefined variables returning nil (score: 152)

Author: William Sumner <prestonsumner@...>

Date: Tue, 19 Mar 2013 18:07:05 -0600

1.) If you're asking how it would be implemented in Lua, I should have been clear that my suggestion assumes a C function in the built-in table library. 2.) One solution might be to return success or

114. Re: Empty? No. Array? No. Has? Yes. (score: 144)

Author: Andrew Starks <andrew.starks@...>

Date: Sat, 6 Jul 2013 23:57:46 -0500

snip I appreciate the explanation and your graciousness. I'm on a particular train of thought that is getting no traction. I'm convinced that the reason is that there is something obvious that I'm mi

115. Re: Propsoal: a lua dialect without nil (score: 144)

Author: joao lobato <btnfdp.lobato@...>

Date: Wed, 16 Feb 2011 00:41:41 +0000

May I suggest the definition of a Map type, implemented in pure lua, on tables, implementing whatever interface the first one to submit it Luarocks may choose? (maybe one could even write a tree impl

116. Re: Undefined variables returning nil (score: 141)

Author: Coda Highland <chighland@...>

Date: Tue, 19 Mar 2013 20:43:24 -0700

This is exactly the use case for creating your own "null" value distinct from nil. It's easy -- as I mentioned in another post, just create a variable "null = {}" and it'll always compare equal to it

117. Uninitialized variable access and nil (score: 134)

Author: Matthew Comi <matthew.comi@...>

Date: Wed, 22 Mar 2006 14:38:30 +0800

Hello... Some Lua behaviour that has bothered me since I started using it was: "It is not an error to access a non-initialized variable; you just get the special value nil as the result" http://www.l

118. Re: Luarocks root_dir is nil (score: 127)

Author: Thijs Koerselman <thijskoerselman@...>

Date: Tue, 17 Aug 2010 17:49:41 +0200

Nevermind! I forgot I installed luarocks system wide now so I need to execute every command as a superuser. Thijs

119. Luarocks root_dir is nil (score: 127)

Author: Thijs Koerselman <thijskoerselman@...>

Date: Tue, 17 Aug 2010 17:16:25 +0200

I'm getting the following error: $ luarocks list /opt/local/bin/lua: /usr/local/share/lua/5.1//luarocks/command_line.lua:90: attempt to index field 'root_dir' (a nil value) stack traceback: /usr/loca

120. ??: How to check if table index exist (score: 124)

Author: ?? ?? <sumneko@...>

Date: Fri, 22 Nov 2019 08:11:19 +0000

When loading a large untrusted table, I would setmetatable of nil, witch saved a lot of code to checking nil. Here is a simple implementation: https://github.com/sumneko/lua-without-check-nil/blob/ma