In Pairs or Ipairs

Question

Is there any difference between in ipairs and in pairs? Which?

a = {1, "b", 3, "d"}
for i, v in pairs(a) do print(i, v) end
print("Ipairs")
for i, v in ipairs(a) do print(i, v) end

Returns:

1   1
2   b
3   3
4   d
Ipairs
1   1
2   b
3   3
4   d

Answer 1

ipairs traverse entire index entries in a table, in order.

pairs scrolls through all entries in a table, in arbitrary order.

In your example, add a.teste=trueafter creating the table or teste=true at creation. The pair teste,true will be visited by pairs but not by ipairs.