If you stick to the concepts that I cover later, they will work across most flavors and Linux utilities. You don't need to think too hard about it. PCRE (Perl Compatible Regular Expressions) is the ...

Input DOES NOT match regular expression. C:\>TestRegExp ^\d{5}$ 12345 Input matches regular expression. As this code demonstrates, the Regex.IsMatch method compares a regular expression to a string ...

Capturing all characters. The simplest example of a character with special meaning is the dot (.In regex, a dot means “any character.” So a regular expression that would match any three ...

Boolean true is returned when a match is found. For example, m.find(1); scans text beginning at index 1. ... Regular expressions are a useful tool that every developer needs to understand.

The first three lines will match, but if you're thinking in globs, that doesn't make sense. Since grep uses regular expressions (regex) when searching files, the asterisk means "zero or more ...

Given their complexity, this article offers streamlined summaries and examples of their use in Excel. The REGEX functions are ...

A quick run down on how you can use regular expressions in your own programs to give you more power over searching and substituting text. Perl has long been an extremely popular choice for text ...

A regular expression is some sequence of characters that represents a pattern. For example, the [0-9] in the example above will match any single digit where [A-Z] would match any capital letter.

Regular expressions, or ‘regex’, are like an in-line programming language for text searches that allow you to include complex search strings, partial matches and wildcards, case-insensitive ...

Granted, that single line RegEx looks like a random garble of characters at first glance. In reality, it is a carefully constructed set of rules to dictate a pattern match on a string.