Small comment.

2020-01-23 20:46:52 +00:00
parent 41cb935930
commit 31e9a54c19
1 changed files with 1 additions and 0 deletions
--- a/contracts/utils/EnumerableSet.sol
+++ b/contracts/utils/EnumerableSet.sol
@ -44,6 +44,7 @@ library EnumerableSet {
        internal
    {
        require(contains(set, value), "EnumerableSet: value not in set");
+        // Replaced the value to remove with the last one in the array. O(1)
        set.values[set.index[value] - 1] = set.values[set.values.length - 1];
        set.values.pop();
        delete set.index[value];