Created
January 4, 2011 20:42
-
-
Save gamefreak/765382 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
__idmt = { | |
__lt = function(a, b) | |
if a[1] == b[1] then | |
if a[2] == nil then print(debug.traceback("A")) end | |
if b[2] == nil then print(debug.traceback("B")) end | |
return a[2] < b[2] | |
else | |
return a[1] < b[1] | |
end | |
end; | |
__le = function(a, b) | |
if a[1] == b[1] then | |
return a[2] <= b[2] | |
else | |
return a[1] <= b[1] | |
end | |
end; | |
__eq = function(a, b) | |
return a[1] == b[1] and a[2] == b[2] | |
end; | |
__tostring = function(a) | |
return (a[0] or "nil") .. ", " .. (a[1] or "nil") | |
end; | |
} | |
function ObjectIterator(list) | |
local function jaggedListIterator(list, index) | |
if index[2] == nil then | |
index[1] = next(list, index[1]) | |
if index[1] == nil then | |
return nil | |
end | |
end | |
local i, k = next(list[index[1]], index[2]) | |
print("DBG", index) | |
index[2] = i | |
return index, k | |
end | |
local nlt = {nil, nil} | |
setmetatable(nlt, __idmt) | |
return jaggedListIterator, list, nlt | |
end | |
list = { | |
{1, 2, 3, 4}, | |
{5, 6, 7}, | |
{8, 9, 10, 11, 12, 13, 14}, | |
{15}, | |
{16, 17, 18}, | |
{19, 20}, | |
} | |
for a, b in ObjectIterator(list) do | |
if b ~= nil then | |
print(a,": ", b) | |
end | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment