测试评估
| 指标 | 结果 |
|---|---|
| Base 测试 | PASS |
| Plus 测试 | PASS |
| 代码长度 | 476 字符 |
模型生成的代码 （476 字符）
def first_non_repeating_character(s: str):
"""
Returns the first non-repeating character in the given string.
If no unique character exists, returns None.
"""
# Count frequencies of each character
char_count = {}
for ch in s:
char_count[ch] = char_count.get(ch, 0) + 1
# Find the first character with count 1
for ch in s:
if char_count[ch] == 1:
return ch
# No non-repeating character found
return NoneBase 失败测试用例
- 无失败测试
Plus 失败测试用例
- 无失败测试