mirror of
https://github.com/koreader/koreader
synced 2024-11-10 01:10:34 +00:00
35 lines
782 B
Lua
35 lines
782 B
Lua
local tableutil = {}
|
|
|
|
|
|
--http://stackoverflow.com/questions/15706270/sort-a-table-in-lua
|
|
function tableutil.spairs(t, order)
|
|
-- collect the keys
|
|
local keys = {}
|
|
for k in pairs(t) do keys[#keys + 1] = k end
|
|
|
|
-- if order function given, sort by it by passing the table and keys a, b,
|
|
-- otherwise just sort the keys
|
|
if order then
|
|
table.sort(keys, function(a, b) return order(t, a, b) end)
|
|
else
|
|
table.sort(keys)
|
|
end
|
|
|
|
-- return the iterator function
|
|
local i = 0
|
|
return function()
|
|
i = i + 1
|
|
if keys[i] then
|
|
return keys[i], t[keys[i]]
|
|
end
|
|
end
|
|
end
|
|
|
|
function tableutil.tablelength(T)
|
|
local count = 0
|
|
for _ in pairs(T) do count = count + 1 end
|
|
return count
|
|
end
|
|
|
|
return tableutil
|