And so here do we see we can checkfor equality with zero.
然后这里我们可以检查与0等价的情况了。
2
After a simple check to ensure the two passwords are of equal length, each key is then matched in the entire password - ensuring that the fifth character is a zero in both passwords, for example.
In addition to comparing the length and index values for equality, you must also checkfor either a null Number after parsing or an empty input string (" "or length of zero).