Two Bug ! #32
Description
bug1: add duplicated key into the trie will incr the size but the key was replaced.
bug2: the meta was not store in the node of last character of key but the new child with val=0x00
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trie.Add("apple\x00p1", "1") // key contains 0
trie.Add("apple\x00p2", "1") // key contains 0
trie.Add("apple", "1") // after apple inserted, the above 2 keys are dispear.
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