下面的代码是做什么的?用Python/Java/C#/C++中之一语言重新实现它。注意程序效率和代码风格。
1: def Boolean no_name(a : String, b : String)
2: if a.length != b.length
3: return false
4:
5: for(x : Integer = 0; x < b.length; x++)
6: if a[0] == b[x]
7: return no_name(utilityFunction(a, 0), utilityFunction(b, x))
8: end
9: end
10:
11: return b.length == 0
12: end
13:
14: def String utilityFunction(s : String, j : Integer)
15: ret = new char[s.length - 1]
16: int d = 0
17: for (k : Integer = 0; k < s.length; k++)
18: if (k == j)
19: d = 1
20: else
21: ret[k - d] = s[k]
22: end
23: end
24: return new String(ret)
25: end
为你在上一题中实现的代码编写单元测试。