英文:
Exclude German umlaut from Given Regex Match
问题
我有一个密码匹配要求，我不想在密码验证中包含德语umlaut。当前的匹配标准是：
- 一个小写字母
- 一个大写字母
- 一个数字
- 至少 10 个字符
我创建了一个如下的正则表达式：
func matchPasswordWith(_ text: String) -> Bool {
let predicate = NSPredicate(format: "SELF MATCHES %@", "^(?=.*?[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[a-zA-Z]).{10,}$")
return predicate.evaluate(with: text)
}
但是当用户输入任何umlaut（如 ü, ä, Ä, ß）时，上面的正则表达式会返回 true，但我想排除umlaut的匹配。
请建议我在这里做错了什么。
英文:
I have a password match requirment where I do not want to include German umlaut in password validation. Current match criteria is:
- one lower case
- one upper case
- One digit
- minimum 10 chars
I created a regex as below:
func matchPasswordWith(_ text: String) -> Bool {
let predicate = NSPredicate(format: "SELF MATCHES %@","^(?=.*?[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[a-zA-Z]).{10,}$")
return predicate.evaluate(with: text)
}
But when a user enters any umlaut (e.g. ü, ä, Ä, ß), the above regex returns true but I want to exclude umlaut match.
Please suggest what am I doing wrong here.
答案1
得分: 1
你可以使用字符类交集来否定字符类中的值。
语法是 &&[]，必须放在字符类内部，位于末尾。
此外，你可以简化你的模式。
(?i)^[a-z\d&&[^äöüÄÖÜß]]{10,}$
(?i) 将启用不区分大小写模式。
以下是一些示例。
这些将匹配。
abcdefghij
1234567890
AbCdE12345
而这些将不匹配。
äbcdefghij
12345
ÄbCdE12345
英文:
You can negate values from a character class, using a character class intersection.
The syntax is &&[], and must be placed within the character class, at the end.
Additionally, you can reduce your pattern.
(?i)^[a-z\d&&[^äöüÄÖÜß]]{10,}$
The (?i) will toggle-on case-insensitive mode.
Here are some examples.
These will match.
abcdefghij
1234567890
AbCdE12345
And, these will not.
äbcdefghij
12345
ÄbCdE12345
答案2
得分: 0
你可以通过包括你想要的所有非umlaut字符来排除umlauts在密码匹配中。将 (?=.*[a-zA-Z]).{10,}$ 替换为类似 [A-Za-z0-9]{10,}$ 的内容。
func matchPasswordWith(_ text: String) -> Bool {
let predicate = NSPredicate(format: "SELF MATCHES %@", "^(?=.*?[0-9])(?=.*[a-z])(?=.*[A-Z])[A-Za-z0-9]{10,}$")
return predicate.evaluate(with: text)
}
[A-Za-z0-9]{10,} 检查所有字符是否是字母或数字，且至少有10个字符。显然，它也排除了其他特殊字符，但你可以随时将这些字符添加到你的字符集中，例如：[A-Za-z0-9@#$%^&*]{10,}，或者任何其他你想要包含的字符。
英文:
You could exclude umlauts in your password matching by including all the non-umlaut characters you want to have. Replacing (?=.*[a-zA-Z]).{10,}$ with something like [A-Za-z0-9]{10,}$
func matchPasswordWith(_ text: String) -> Bool {
let predicate = NSPredicate(format: "SELF MATCHES %@","^(?=.*?[0-9])(?=.*[a-z])(?=.*[A-Z])[A-Za-z0-9]{10,}$")
return predicate.evaluate(with: text)
}
[A-Za-z0-9]{10,} Checks that all characters are either a letter or a number and that there are at least 10 characters. Obviously it also excludes other special characters, but you could always add those to your character set like: [A-Za-z0-9@#$%^&*]{10,}. or whatever other characters you want to include.
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