Lua table.toString(tableName)和table.fromString(stringTable)函数？

Question

我想将2d lua表转换为字符串,然后将其转换为字符串后,使用新创建的字符串将其转换回表.好像这个过程被称为序列化,并在下面的url中讨论,但我很难理解代码,并希望有人在这里有一个简单的table.toString和table.fromString函数
http:// lua- users.org/wiki/TableSerialization

Answer 1

我使用以下代码来序列化表:

function serializeTable(val, name, skipnewlines, depth)
    skipnewlines = skipnewlines or false
    depth = depth or 0

    local tmp = string.rep(" ", depth)

    if name then tmp = tmp .. name .. " = " end

    if type(val) == "table" then
        tmp = tmp .. "{" .. (not skipnewlines and "\n" or "")

        for k, v in pairs(val) do
            tmp =  tmp .. serializeTable(v, k, skipnewlines, depth + 1) .. "," .. (not skipnewlines and "\n" or "")
        end

        tmp = tmp .. string.rep(" ", depth) .. "}"
    elseif type(val) == "number" then
        tmp = tmp .. tostring(val)
    elseif type(val) == "string" then
        tmp = tmp .. string.format("%q", val)
    elseif type(val) == "boolean" then
        tmp = tmp .. (val and "true" or "false")
    else
        tmp = tmp .. "\"[inserializeable datatype:" .. type(val) .. "]\""
    end

    return tmp
end

然后可以使用loadstring()执行创建的代码:http://www.lua.org/manual/5.1/manual.html#pdf-loadstring 如果您已经将参数传递给'name'参数(或者之后附加它) :

s = serializeTable({a = "foo", b = {c = 123, d = "foo"}})
print(s)
a = loadstring(s)()

Answer 2

发布的代码lhf是一个比你链接的页面更简单的代码示例,所以希望你能更好地理解它.使其适应输出字符串而不是打印输出,如下所示:

t = {
{11,12,13},
{21,22,23},
}

local s = {"return {"}
for i=1,#t do
  s[#s+1] = "{"
  for j=1,#t[i] do
    s[#s+1] = t[i][j]
    s[#s+1] = ","
  end
  s[#s+1] = "},"
end
s[#s+1] = "}"
s = table.concat(s)

print(s)

序列化的一般思想是从一些数据结构(如表)中获取所有数据位,然后循环遍历该数据结构,同时构建一个包含所有这些数据位以及格式化字符的字符串.

Answer 3

下kong作品这个

local cjson = require "cjson"
kong.log.debug(cjson.encode(some_table))

出了kong应该安装lua-cjson包https://github.com/openresty/lua-cjson/

Answer 4

怎么样JSON模块？这样，您还可以获得更好的可交换数据。我通常更喜欢dkjson，它也支持utf-8，而cmjjson不支持。