In this article. A regular expression is a pattern that the regular expression engine attempts to match in input text. Character Classes · NET Regular Expressions · Character Escapes · Options
' | ' is used to or-ing two regular expression. I created a regex /^a*|b*$/ , and I want it to detect any string that contains only charater of 'a' or 'b'.
A RegEx, or Regular Expression, is a sequence of characters that forms a search pattern. RegEx can be used to check if a string contains the specified ... Python PIP · Try it Yourself · Try it
Regular Expression, or regex or regexp in short, is extremely and amazingly powerful in searching and manipulating text strings, particularly in processing ...