Lua is a lightweight interpreted programming language developed in Brazil with a focus on embedding. It is written in Pure ANSI C which means high portability, even as C++ code. Here is an example: print(“Hello World!”) Wikipedia Summary Official Site
Lua is a dynamic language and functions are just a kind of value that can be called with the () operator. So you don’t really need to forward declare the function so much as make sure that the variable in scope when you call it is the variable you think it is. This is not … Read more
A userdata is a garbage-collected value of an arbitrary size and content. You create one from the C API, with lua_newuserdata(), which creates and pushes it on the stack and gives you a pointer to its content to initialize as you see fit from C. It is very comparable to calling malloc(). A key distinction … Read more
You can hack it via the native, global search: Ctrl + Shift + F (to open global search) Use regex mode (check “regex” checkbox) In the searchbox, enter only a caret “^” (without the quotes) You may want to limit the search to a specific directory, via the “directory” tab Hit the “Open in Find … Read more
Semi-colons in Lua are generally only required when writing multiple statements on a line. So for example: local a,b=1,2; print(a+b) Alternatively written as: local a,b=1,2 print(a+b) Off the top of my head, I can’t remember any other time in Lua where I had to use a semi-colon. Edit: looking in the lua 5.2 reference I … Read more
Your problem stems from a misunderstanding of the or operator that is common to people learning programming languages like this. Yes, your immediate problem can be solved by writing x ~= 0 and x ~= 1, but I’ll go into a little more detail about why your attempted solution doesn’t work. When you read x … Read more
The idiomatic way to iterate over an array is: for _, armyName in ipairs(armies) do doStuffWithArmyName(armyName) end Note that: Use ipairs over pairs for arrays If the key isn’t what you are interested, use _ as placeholder. If, for some reason, that _ placeholder still concerns you, make your own iterator. Programming in Lua provides … Read more
Here is an implementation of a locals() function. It will return a table of locals from the calling scope: function locals() local variables = {} local idx = 1 while true do local ln, lv = debug.getlocal(2, idx) if ln ~= nil then variables[ln] = lv else break end idx = 1 + idx end … Read more
It’s elseif, not else if (notice the space). The error is because the interpreter expects an end to each else block. See the manual for more information.
According to Programming in Lua 2.4 Strings: We can delimit literal strings also by matching double square brackets [[…]]. Literals in this bracketed form may run for several lines, may nest, and do not interpret escape sequences. Moreover, this form ignores the first character of the string when this character is a newline. This form … Read more