Luaの基本的なイテレータの使用例

name = {"YYX","HJZ"};
-- the following is called a generic for iterator
-- where key denotes the index value, starting from 1
--value denotes the element in the array
--ipairs denotes the iterative function
for key,value in ipairs(name) do
 print(key,value);
end
--implement a self-addition algorithm stateless iterative function
function NumAdd(count,var)
 -- Define a local variable _count and initialize it to 0
 local _count = 0 ;
 -- The parameter count indicates the number of iterations needed for the function
 --In fact, the idea here is a bit like the C recursion
 --Implementing recursion requires a conditional exit, with a beginning and an end
 if(var < count)
 then
     var = var + 1 ;
  return var , var + _count ;
 end
end 
--output the value of the iteration function, i means the number of iterations, n means the value after iteration
for i , n in NumAdd,5,0
do 
  print(i,n);
end
array = {1,2,3,4,5,6,7,8,9,10};
function array_put(length , var)
 --get the length of the array
 length = #array ;
 --If the value to be traversed is less than the length of the array, then traverse it
 if(var < length)
 then 
   var = var + 1 ;
   return var , array[var] ;
 end 
end
for i , n in array_put,10,0
do
 print(i,n);
end