Leetcode - First Unique Character in a String
https://leetcode.com/problems/first-unique-character-in-a-string/
Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.
Examples:
s = "leetcode" return 0. s = "loveleetcode", return 2.
func firstUniqChar(s string) int {
count := make([]int, 26)
for i := 0; i < len(s); i++ {
count[s[i]-'a']++
}
for i := 0; i < len(s); i++ {
if count[s[i]-'a'] == 1 {
return i
}
}
return -1
}
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