How can I match a pattern as long as it’s not at the beginning with regex?
You can use a look behind to make sure it is not at the beginning. (?<!^)aaa
regex-negation
Regex – Does not contain certain Characters
^[^<>]+$ The caret in the character class ([^) means match anything but, so this means, beginning of string, then one or more of anything except < and >, then the end of the string.
Regex: match pattern as long as it’s not in the beginning
You can use a look behind to make sure it is not at the beginning. (?<!^)aaa
How to exclude a specific string constant? [duplicate]
You have to use a negative lookahead assertion. (?!^ABC$) You could for example use the following. (?!^ABC$)(^.*$) If this does not work in your editor, try this. It is tested to work in ruby and javascript: ^((?!ABC).)*$
Regex matching between two strings?
this should do the trick m = re.findall ( ‘<!–(.*?)–>’, string, re.DOTALL)
Regular expression that doesn’t contain certain string [duplicate]
By the power of Google I found a blogpost from 2007 which gives the following regex that matches string which don’t contains a certain substring: ^((?!my string).)*$ It works as follows: it looks for zero or more (*) characters (.) which do not begin (?! – negative lookahead) your string and it stipulates that the … Read more
How to negate the whole regex?
Use negative lookaround: (?!pattern) Positive lookarounds can be used to assert that a pattern matches. Negative lookarounds is the opposite: it’s used to assert that a pattern DOES NOT match. Some flavor supports assertions; some puts limitations on lookbehind, etc. Links to regular-expressions.info Lookahead and Lookbehind Zero-Width Assertions Flavor comparison See also How do I … Read more
Regular expression for a string containing one word but not another
This should do it: ^(?!.*details\.cfm).*selector=size.*$ ^.*selector=size.*$ should be clear enough. The first bit, (?!.*details.cfm) is a negative look-ahead: before matching the string it checks the string does not contain “details.cfm” (with any number of characters before it).
Regular expression to match a line that doesn’t contain a word
Regular expression to match a line that doesn’t contain a word
Regular expression for SSN and phone number [closed]
You might try: ^(?!((\\d{9})|(\\d{3}-\\d{2}-\\d{4})|(\\d{3}-\\d{3}-\\d{3}))$).* To explain, if we read the query you provided: ^((?!\\d[9]$)|(?!(\\d{3}-?\\d{2}-?\\d{4}$)|(?!(\\d{3}-?\\d{3}-?\\d{3})$)$ We could read that: is not followed by xxxxxxxxx OR is not followed by xxx-xx-xxxx OR is not followed by xxx-xxx-xxx (in my version at the top, I rephrased this to be: is not (xxxxxxxxx OR xxx-xx-xxxx OR xxx-xxx-xxx).). Any string … Read more