Lua Quick Start Guide

Other operators

There are a few miscellaneous meta methods that might be useful. These misc meta methods are mainly focused around string-like operations:

• __tostring: Expected to return a string representation of a table. Takes a single argument, the table being converted to a string.
• __len: Expected to return the length of the table when writing #table. Takes a single argument, the table whose length we are trying to find.
• __concat: Expected to concatenate two tables when writing table1 .. table2. This function does not have to return a string, but for the sake of consistency it probably should. This function takes two arguments, the tables being concatenated.