NET Regex. (with ignore-case)
NET正则表达式。 （使用ignore-case）
I want it to match
我希望它匹配
field_x_12
field_a_ABC
field_r_something
etc
等等
My question is why the . operator doesn't work in this regex:
我的问题是为什么。运算符在此正则表达式中不起作用：
field_[.]_.*
yet this (equivalent basically) regex does work:
然而这个（相当于基本的）正则表达式确实有效：
field_[a-z]_.*
Is there something I'm missing about the dot operator . ?
关于点运算符有什么我想念的吗？ ？
5 个解决方案
#1
6
A . inside a character class ([...]) is a literal dot character. If you want it to act as a wildcard, don't use the brackets.
一个 。在一个字符类（[...]）里面是一个文字点字符。如果您希望它充当通配符，请不要使用括号。
#2
1
Why are you using [.]? The [] denotes a explicit set of characters, so the . character is what the RegEx is looking for.
你为什么用[。]？ []表示一组明确的字符，所以。字符是RegEx正在寻找的。
field_._.*
Should work fine.
应该工作正常。
See this handy .NET RegEx cheat sheet.
请参阅这个方便的.NET RegEx备忘单。
#3
0
Inside brackets . is a literal dot and doesn't match any character.
括号内。是一个文字点，不匹配任何字符。
#4
0
You should try field_._.* because inside the [] it is treatd as an acutal dot.
您应该尝试字段_._。*因为在[]内部它被视为一个实际点。
#5
0
When it's inside a character class, the dot is just a period, not a wildcard.
当它在一个字符类中时，点只是一个句点，而不是通配符。
#1
6
A . inside a character class ([...]) is a literal dot character. If you want it to act as a wildcard, don't use the brackets.
一个 。在一个字符类（[...]）里面是一个文字点字符。如果您希望它充当通配符，请不要使用括号。
#2
1
Why are you using [.]? The [] denotes a explicit set of characters, so the . character is what the RegEx is looking for.
你为什么用[。]？ []表示一组明确的字符，所以。字符是RegEx正在寻找的。
field_._.*
Should work fine.
应该工作正常。
See this handy .NET RegEx cheat sheet.
请参阅这个方便的.NET RegEx备忘单。
#3
0
Inside brackets . is a literal dot and doesn't match any character.
括号内。是一个文字点，不匹配任何字符。
#4
0
You should try field_._.* because inside the [] it is treatd as an acutal dot.
您应该尝试字段_._。*因为在[]内部它被视为一个实际点。
#5
0
When it's inside a character class, the dot is just a period, not a wildcard.
当它在一个字符类中时，点只是一个句点，而不是通配符。