Alternate - match either a or b a|b Any whitespace character \s Any non-whitespace character \S Any digit \d Any non-digit \D Any word character \w Any non-word character \W Non-capturing group (?:...) Capturing group (...) Zero or one of a a? Zero or more of a a* One ...
/Perl *Python/ # Perl, zero or more spaces, and Python Related examples in the same category 1. Regexps use elements to instruct the regular expression engine on how to find a given string. 2. An example of a regular expression used to match a string with the String method scan. 3....
For example, the expression \s*cat\s* means: zero or more spaces, followed by a lowercase c, followed by a lowercase a, followed by a lowercase t, followed by zero or more spaces. "\s*cat\s*" => The fat cat sat on the concatenation. Test the regular expression 2.3.2 The Plus...
When true, a Match occurred and we can access its Value or Groups. Regex Groups Part 4 We access Groups when Success is true. This collection is indexed at 1, not zero—the first group is found at index 1. using System; using System.Text.RegularExpressions; // Part 1: the input ...
Not sure if that's a bug or not, but you can perfectly use " *?" to search for zero or more spaces (I always try to use lazy search when possible, if that's not your case remove the question mark after star), I have put that ...
zero or more letters no other characters such as spaces The string must also be a minimum of 8 characters and a maximum of 13 characters. Placement of the numbers and/or letters within the 8-13 character string does not matter. I haven't figured out how to make su...
Zero or one of a a? Zero or more of a a* One or more of a a+ Exactly 3 of a a{3} 3 or more of a a{3,} Between 3 and 6 of a a{3,6} Start of string ^ End of string $ A word boundary \b Non-word boundary \B Regular Expression 12 matches (339 steps, 15.95ms) ...
For example, the expression \s*cat\s* means: zero or more spaces, followed by a lowercase c, followed by a lowercase a, followed by a lowercase t, followed by zero or more spaces."\s*cat\s*" => The fat cat sat on the concatenation. ...
startat is less than zero or greater than the length of input. RegexMatchTimeoutException A time-out occurred. For more information about time-outs, see the Remarks section. Examples The following example double-spaces all but the first line of a string. It defines a regular expression patt...
startat is less than zero or greater than the length of input. RegexMatchTimeoutException A time-out occurred. For more information about time-outs, see the Remarks section. Examples The following example double-spaces all but the first line of a string. It defines a regular expression patt...