Hi , I want to allow (.) and (a-zA-Z) letters and _ and - , I have some problems with the (.) ,
Any idea ?
Thanks in advance ,
Ish
views:
55answers:
7
A:
This will do [a-zA-Z_.-]+
Outside the character class, ([]), you need to escape the dot (\.)as it is a meta character.
[a-z]+\.com #matches `something.com`
Amarghosh
2010-06-07 09:29:48
A:
This should work just fine:
[A-z._\-]+
Please be aware that you my have to escape that slash depending on your programming language.
Bobby
2010-06-07 09:29:56
`A-z` will allow symbols from 91 thru 96 `[\\]^_\`` And hyphen need not be escaped if it is the first or last character in a character class
Amarghosh
2010-06-07 09:31:23
+1
A:
[A-Za-z_.-]
is a character class that includes all the characters you mentioned. Inside a character class, it's not necessary to escape the ., and you can avoid escaping the - if you put it first or last.
If numbers are ok, too, you can shorten this to
[\w.-]
Tim Pietzcker
2010-06-07 09:29:59
A:
[a-zA-Z_\-.] should work. You might have to use a double slash, depending on the language you are using.
npinti
2010-06-07 09:30:51
A:
. Has a special meaning in regular expressions, it uses to denote any character. Therefore you need to use escape character.
So you need to use \.
Upul
2010-06-07 09:32:03
A:
As everyone already said, if you enclose a set of characters (no need to escape in this situation) in square brackets, you are saying: "please allow these characters I'm putting inside. I found a reference video for you: Skip to 22-23 min
chiurox
2010-06-07 20:00:30