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-- Code from http://lua-users.org/wiki/SimpleStack
--module(...,package.seeall)
local M={}
local Stack = {}
M.Stack = Stack
local unpack = table.unpack
-- Create a Table with stack functions
function Stack:Create()
-- stack table
local t = {}
-- entry table
t._et = {}
-- push a value on to the stack
function t:push(...)
if ... then
local targs = {...}
-- add values
for _,v in pairs(targs) do
table.insert(self._et, v)
end
end
end
-- pop a value from the stack
function t:pop(num)
-- get num values from stack
local num = num or 1
-- return table
local entries = {}
-- get values into entries
for i = 1, num do
-- get last entry
if #self._et ~= 0 then
table.insert(entries, self._et[#self._et])
-- remove last value
table.remove(self._et)
else
break
end
end
-- return unpacked entries
return unpack(entries)
end
-- get entries
function t:getn()
return #self._et
end
-- list values
function t:list()
for i,v in pairs(self._et) do
print(i, v)
end
end
function t:join(s)
return table.concat(self._et,s)
end
return t
end
return M
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