I want to check an input string to validate a proper text.
我想检查输入字符串以验证正确的文本。
a. I want the users to allow to writer alphanumeric characters including period, comma, hyphen and round bracket ()
一个。我希望用户允许编写字母数字字符,包括句点,逗号,连字符和圆括号()
b. However, i dont want the users to enter a NUMBER with 3 or more digits together. eg: 12 is allowed while 185 is NOT.
湾但是,我不希望用户一起输入3位或更多位数的NUMBER。例如:允许12,而185不允许。
c. I dont want the users to enter strings like "............." or "----------" or "aaaaaaaaaaaaaa" or "bbbbbbbb" etc.
C。我不希望用户输入“.............”或“----------”或“aaaaaaaaaaaaaa”或“bbbbbbbb”等字符串。
Please suggest the regular expression for the same.
请建议相同的正则表达式。
2 个解决方案
#1
1
You can use the regex:
你可以使用正则表达式:
(?!.*(.)\1{2})^[a-zA-Z0-9.,()-]*$
It uses the negative lookahead (?!.*(.)\1{2}) to ensure that there is no group of 3 repetitions of any of the characters.
它使用负前瞻(?!。*(。)\ 1 {2})来确保不存在任何字符的3个重复组。
Then it uses the regex ^[a-zA-Z0-9.,()-]*$ to ensure that the string is made of just alphabets, numbers, period, comma, parenthesis and hyphen.
然后它使用正则表达式^ [a-zA-Z0-9。,() - ] * $来确保字符串仅由字母,数字,句点,逗号,括号和连字符组成。
#2
0
Most regex libs support the folloing: /(.)\1{2,}/
大多数正则表达式库支持以下内容:/(.)\1{2,}/
where \1 is a a backreference
其中\ 1是反向引用
#1
1
You can use the regex:
你可以使用正则表达式:
(?!.*(.)\1{2})^[a-zA-Z0-9.,()-]*$
It uses the negative lookahead (?!.*(.)\1{2}) to ensure that there is no group of 3 repetitions of any of the characters.
它使用负前瞻(?!。*(。)\ 1 {2})来确保不存在任何字符的3个重复组。
Then it uses the regex ^[a-zA-Z0-9.,()-]*$ to ensure that the string is made of just alphabets, numbers, period, comma, parenthesis and hyphen.
然后它使用正则表达式^ [a-zA-Z0-9。,() - ] * $来确保字符串仅由字母,数字,句点,逗号,括号和连字符组成。
#2
0
Most regex libs support the folloing: /(.)\1{2,}/
大多数正则表达式库支持以下内容:/(.)\1{2,}/
where \1 is a a backreference
其中\ 1是反向引用