Technical Interview Question: First Unique Character in a String [LeetCode]

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[leob.]

Great explanations - I subscribed. If you're still doing these, I'd love to see videos on graph problems using BFS, DFS, etc.

[emaxn]

Inside for loop (C#): if (s.IndexOf(s[i]) == s.LastIndexOf(s[i])) return i; it works, not sure about complexity, but looks the same :)

[jeffge]

dude i wish i could give your video more likes

[milaness]

Do you always recommend using c# or java for string problems?

[ashiqimran]

Can you make video of Trapping Rain Water Problem?

[imadalamaddin]

Are you sure the Map class guaranteed order?

[leyocode]

public int firstUniqChar(String s) {
char[] charArray = new char[26];
for(int i = 0 ; i<s.length();i++){
charArray[s.charAt(i) - 'a'] += 1;

}
for(int i = 0 ; i<s.length();i++){
if(charArray[s.charAt(i)-'a'] == 1) return i;
}

return -1;
}
better :)