- Leetcode PHP题解--D100 387. First
- Unique/Duplicate String
- 387. First Unique Character in a
- 387. First Unique Character in a
- 387. First Unique Character in a
- 387. First Unique Character in a
- 387. First Unique Character in a
- 387. First Unique Character in a
- 387. First Unique Character in a
- 387. First Unique Character in a
原始代码：
//用一个int[26]记录小写字母出现次数，最后遍历一次，返回第一个值是1的index
public int firstUniqChar(String s) {
int[] map = new int[26];
for (int i = 0; i < s.length(); i++) {
map[s.charAt(i) - 'a']++;
}
for (int i = 0; i < s.length(); i++) {
if (map[s.charAt(i) - 'a'] == 1) return i;
}
return -1;
}
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