Nginx location: Nginx location block section have a search order, a modifier, an implicit match type and an implicit switch to whether stop the search on match or not. the following array describe it for regex. # ——————————————————————————————————————————————– # Search-Order Modifier Description Match-Type Stops-search-on-match # ——————————————————————————————————————————————– # 1st = The URI must match the specified … Read more
Use a one-liner: $ perl -pi.bak -e ‘s/blue/red/g’ *_classification.dat Explanation -p processes, then prints <> line by line -i activates in-place editing. Files are backed up using the .bak extension The regex substitution acts on the implicit variable, which are the contents of the file, line-by-line
You forgot a dot in front of the asterisk: rename -n ‘s/(\w+) – (\d{1})x(\d{2}).*$/S0$2E$3\.srt/’ *.srt On OpenSUSE, RedHat, Gentoo you have to use Perl version of rename. This answer shows how to obtain it. On Arch, the package is called perl-rename.
Depending on the regular expression implementation you can use so called non-capturing groups with the syntax (?:…): ((?:a|b)c) Here (?:a|b) is a group but you cannot reference its match. So you can only reference the match of ((?:a|b)c) that is either ac or bc.
{[0-9]+:[0-9]+} try adding plus(es)
The * quantifier matches zero or more occurences. In practice, this means that \d* will match every possible input, including the empty string. So your regex matches at the start of the input string and returns the empty string.
Use negative lookahead assertion. foo(?:(?!foo).)*?boo DEMO (?:(?!foo).)*? – Non-greedy match of any character but not of foo zero or more times. That is, before matching each character, it would check that the character is not the letter f followed by two o‘s. If yes, then only the corresponding character will be matched. Why the regex … Read more
Escape it with a backslash: /\^/ This will make it be interpreted as a literal ^ character.
I created this attribute which allows you to specify RegexOptions. EDIT: It also integrates with unobtrusive validation. The client will only obey RegexOptions.Multiline and RegexOptions.IgnoreCase since that is what JavaScript supports. [RegularExpressionWithOptions(@”.+@example\.com”, RegexOptions = RegexOptions.IgnoreCase)] C# public class RegularExpressionWithOptionsAttribute : RegularExpressionAttribute, IClientValidatable { public RegularExpressionWithOptionsAttribute(string pattern) : base(pattern) { } public RegexOptions RegexOptions { get; … Read more