a.lua

function change_to_space(space)
    -- already on space
    if space == spaces.activeSpace() then
        return
    end

    local new_space = get_spaces()[space]
    print("changed")
    if new_space ~= nil then
        spaces.changeToSpace(new_space)
    else
        error("space does not exist: " .. tostring(space))
    end
end

function func_change_to_space(index)

    print("index" .. index)
    return function(index)
        return change_to_space(index)
    end
end