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string.gmatch is the "gmatch" entry in the table named by the global variable string. Arguments that you receive from MediaWiki are tables. But they're a bit special. Arrays are tables that follow a specific convention. The numerical fields in the array start at one, and run contiguously with no "holes" with nil values in the middle of the array.
The script at Module:LuaCall has been written to accept any set of named parameters somename=value, for each one storing the string value in the variable with the name somename, and then allowing you to use these variables as parameters for any function available in Lua.
This module provides utilities for declaring classes in Lua code. It creates global variables, so must be called before require ( 'strict' ) if that is used. The above documentation is transcluded from Module:Lua class/doc .
Lua provides some syntactic sugar to facilitate object orientation. To declare member functions inside a prototype table, one can use function table: func (args), which is equivalent to function table. func (self, args). Calling class methods also makes use of the colon: object: func (args) is equivalent to object. func (object, args).
So, much of what these books explain about Lua standard library functions and variables that come with the language is either irrelevant or untrue here. The original API specification — the Lua standard library functions and variables that are supposed to be available in modules — is given at MW:Extension:Scribunto/API specification ...
Help:Lua for beginners; Help:Lua debugging – about debugging Lua modules; Wikipedia:Lua style guide – standards to improve the readability of code through consistency; Module:Sandbox provides a pseudo-namespace for experimenting with Lua modules
Non-local variables are the primary reason it is difficult to support nested, anonymous, higher-order and thereby first-class functions in a programming language. If the nested function or functions are (mutually) recursive, it becomes hard for the compiler to know exactly where on the call stack the non-local variable was allocated, as the frame pointer only points to the local variable of ...
Lua is a scripting language which can be used to analyze data, calculate expressions, ... --Declare a local variable and set it equal to--"Hello World!".