Description

Concat concatenates the n values at the top of the stack, pops them, and leaves the result at the top. If n is 1, the result is the single value on the stack (that is, the function does nothing); if n is 0, the result is the empty string. Concatenation is performed following the usual semantic of Lua.

http://www.lua.org/manual/5.2/manual.html#lua_concat

Concat is referenced in 1 repository

github.com/Shopify/go-lua