Lua打印table树形结构

--这是quick中的工具，作用就是打印Lua中强大的table的结构， 当table的嵌套层级比较多的时候，这个工具非常方便，开发中必备的工具。
--具体使用方法：local debug = require("debug")
--　　　　　　　debug.dump(dataTable, "dataTable", 3)  接下来就可以在控制台看到输出的结果了，非常漂亮的树形结构

 1 module(..., package.seeall)
 2 
 3 local g_Debug_Flag = true
 4 
 5 function log(msg)
 6     if g_Debug_Flag == false then
 7         return
 8     end
 9     cclog(msg)
10 end
11 
12 ---
13 --@function  dump()
14 --@param value table 需要打印的
15 --@param description string 描述
16 --@param nesting int table嵌套层级
17 --@end
18 
19 function dump(value, description, nesting)
20     if g_Debug_Flag == false then
21         return
22     end
23 
24     --默认打印层级3
25     if type(nesting) ~= "number" then
26         nesting = 3
27     end
28 
29     local lookupTable = {}
30     local result =  {}
31 
32     local function _v(v)
33         if type(v) == "string" then
34             v = "\"" .. v .. "\""
35         end
36         return tostring(v)
37     end
38 
39     local function _dump(value, description, indent, nest, keylen)
40         description = description or "<var>"
41         spc = ""
42         if type(keylen) == "number" then
43             spc = string.rep(" ",keylen - string.len(_v(description)))
44         end
45 
46         if type(value) ~= "table" then
47             result[#result + 1] = string.format("%s%s%s = %s", indent, _v(description), spc, _v(value))
48         elseif lookupTable[value] then
49             result[#result + 1] = string.format("%s%s%s = *REF*", indent, description, spc)
50         else
51             lookupTable[value] = true
52             if nest > nesting then
53                 result[#result + 1] = string.format("%s%s = *MAX NESTING*", indent, description)
54             else
55                 result[#result + 1] = string.format("%s%s = {" , indent, _v(description))
56                 local indent2 = indent .. "    "
57                 local keys = {}
58                 local keylen = 0
59                 local values = {}
60                 for k, v in pairs(value) do
61                     keys[#keys + 1] = k
62                     local vk = _v(k)
63                     local vk1 = string.len(vk)
64                     if vk1 > keylen then
65                         keylen = vk1
66                     end
67                     values[k] = v
68                 end
69                 table.sort(keys,function(a, b)
70                     if type(a) == "number" and type(b) == "number" then
71                         return a < b
72                     else
73                         return tostring(a) < tostring(b)
74                     end
75                 end)
76 
77                 for i, k in pairs(keys) do
78                     _dump(values[k], k, indent2,nest + 1,keylen)
79                 end
80                 result[#result + 1] = string.format("%s}", indent)
81             end
82         end
83     end
84     _dump(value,description, "- ", 1)
85 
86     for i, line in pairs(result) do
87         print(line)
88     end
89 
90 end