Regular expressions - JavaScript

The following examples illustrate the use and construction of simple regular expressions. Each example includes the type of text to match, one or more ...

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 ...

2023年12月2日 — Example : ([A-Z]-w+) contains two different elements of the regular expression combined together. This expression will match any pattern ...

2017年6月22日 — Regular expressions (regex or regexp) are extremely useful in extracting information from any text by searching for one or more matches of a ...

1.2 Example: Numbers [0-9]+ or -d+ ... This regex matches any numeric substring (of digits 0 to 9) of the input. For examples, ... Take note that this regex matches ...

Regular expressions (called REs, or regexes, or regex patterns) are essentially ... For example, the regular expression test will match the string test exactly.

Definitions. In formal language theory, a regular expression (a.k.a. regex, regexp, or r.e.), is a string that represents a regular (type-3) language.

2024年1月2日 — Regular expressions are patterns used to match character combinations in strings. In JavaScript, regular expressions are also objects.

A simple example for a regular expression is a (literal) string. For example, the Hello World regex matches the Hello World string.