I can’t import tables with require

Question

I’m learning the Moon programming, and I’m learning the Require. But when I try to import a table or anything else a mistake happens.

What I’m trying to do is export a table with a function.

What I want to export:

  local calculadora = {
    somar = function(x, y)
        return x + y
    end
}

function calculadora.multiplicar(x, y)
    return x * y
end

How I’m importing:

require("calculadora")

print (calculadora.somar(1, 1))

The mistake:

lua: segundo.lua:1: module 'calculadora' not found:
    no field package.preload['calculadora']
    no file '.\calculadora.lua'
    no file 'C:\Program Files (x86)\Lua\5.1\lua\calculadora.lua'
    no file 'C:\Program Files (x86)\Lua\5.1\lua\calculadora\init.lua'
    no file 'C:\Program Files (x86)\Lua\5.1\calculadora.lua'
    no file 'C:\Program Files (x86)\Lua\5.1\calculadora\init.lua'
    no file 'C:\Program Files (x86)\Lua\5.1\lua\calculadora.luac'
    no file '.\calculadora.dll'
    no file 'C:\Program Files (x86)\Lua\5.1\calculadora.dll'
    no file 'C:\Program Files (x86)\Lua\5.1\loadall.dll'
    no file 'C:\Program Files (x86)\Lua\5.1\clibs\calculadora.dll'
    no file 'C:\Program Files (x86)\Lua\5.1\clibs\loadall.dll'
    no file '.\calculadora51.dll'
    no file 'C:\Program Files (x86)\Lua\5.1\calculadora51.dll'
    no file 'C:\Program Files (x86)\Lua\5.1\clibs\calculadora51.dll'
stack traceback:
    [C]: in function 'require'
    segundo.lua:1: in main chunk
    [C]: ?
>Exit code: 1

What I do?

Answer 1

You ended up forgetting to export the calculator table.

Follow the example:

local calculadora = {
    somar = function(x, y)
        return x + y
    end
}

function calculadora.multiplicar(x, y)
    return x * y
end

return calculadora

Now in the file you will import, you must assign the require to a variable in order to make the call.

local calculadora = require("calculadora")

print(calculadora.somar(1, 1))

Modules and Packages

See example on page 11 of the pdf file under "Listing 15.2"