Understand the basics of Regular Expressions (Regex) in under 3 ...

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

Alternation is the term in regular expression that is actually a simple “OR”. In a regular expression it is denoted with a vertical line character |.

A regular expression sometimes referred to as rational expression, is a sequence of characters that specifies a match pattern in text.

Regular expressions are patterns used to match character combinations in strings. In JavaScript, regular expressions are also objects.

Regular Expression, or regex or regexp in short, is extremely and amazingly powerful in searching and manipulating text strings, particularly in processing ...

' | ' 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'.

Example to create logical or or || operations in regular expressions - a simple tutorial as part of the OCPsoft regular expressions guide.

I'm going to assume you want to build a the regex dynamically to contain other words than part1 and part2, and that you want order not to ...

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 tester with syntax highlighting, PHP / PCRE & JS Support, contextual help, cheat sheet, reference, and searchable community patterns.