小编cyh*_*iso的帖子

我正在尝试用lua解析一些xml文件,我仍然坚持这个功能:

function get_node_by_id (xml, nodeId)
    for i=1, #xml, 1 do
        if get_attr_by_name(xml[i], 'Id') == nodeId then
            print ("TRUEEEEE", i, xml[i])
            return xml[i]
        else
            get_node_by_id(xml[i], nodeId)
        end
    end
end

问题是print("TRUEEEEE", i, xml[i])有效,但它会nil在下一行返回return xml[i].我究竟做错了什么？

我在Lua有两节课.一个继承了另一个.

test1 = {test1Data = 123, id= {0,3}}
function test1:hello()
    print 'HELLO!'
end
function test1:new (inp)
    inp = inp or {}
    setmetatable(inp, self)
    self.__index = self
    return inp
end
test2 = {}
function test2:bye ()
    print ('BYE!', self.id)
end
function test2:new_inst_test (baseClass, inp)
    inp = inp or {}
    setmetatable(inp, self)
    self.__index = self
    if baseClass then
        setmetatable( inp, { __index = baseClass } )
    end
    return inp
end

a = test1:new({passData='abc1'})
b = test1:new({passData='ghyrty'})

c = test2:new_inst_test(a,{temp = '123343321135'})
d …