Do file only once in Lua

Question

I was wondering if there's a way to do a lua file only once and have any subsequent attempts to do that lua file will result in a no-op. I've already thought about doing something akin to C++ header's #if/else/endif trick. I'm wondering if there's a standard way to implement this. James

Accepted Answer

well, `require` pretty much does that.

```
require "file" -- runs "file.lua"
require "file" -- does not run the "file" again
```

Do file only once in Lua

Solution

Problem