A basic function declaration includes the function keyword followed by the function name and a pair of parentheses (()).Since the function's body will be a block of code, it must be. Once defined, a function can be executed through a command or triggered through an /articles/events|event. Functions are sets of instructions that can be used multiple times in a script. Using a binding between Lua and C++, is it possible to pass a lua table to a C/C++ function somehow? Here is an example (don't bother if it is programmtically correct, just typing blind here, you should get the point I hope): (Lua) table - recognize that [2.Executing this return statement completes execution of the. The body of double has only a single line. Each call expresson results in the body of double being executed, but with a different value of x.
The two expressions above are both call expressions.In the second one, the value of the expression -0.6/4 is computed and then passed as the argument named x to the double function.The string library provides all its functions inside the table string. Thus, the last character is at position -1, and so on. Indices are allowed to be negative and are interpreted as indexing backwards, from the end of the string. When indexing a string in Lua, the first character is at position 1 (not at 0, as in C).A metatable is a table which, with some certain keys set, can change the behaviour of the table it. Every table can have a metatable attached to it. Knowledge of how to use metatables will allow you to be much more powerful in your use of Lua. In this tutorial I'll be covering a very important concept in Lua: metatables.
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