Tool to search (or test) in a text, a message, or a document by regular expression / rational expression and extract matching substrings.
Regular Expression Search - dCode
Tag(s) : Data Processing
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Regular Expression Search
Regexp Search in a Text
Answers to Questions (FAQ)
What is a regular expression?
A regular expression (or rational expression or regexp) is a string that describes a set of other possible strings in a precise syntax, and is used in computing for search, editing and text control.
Example: a(b|c)[a-z]{3}describes a set of 5 letters beginning with a, followed by b or c and 3 other letters between a and z, in small caps
Example: [0-9]{2}!? describes a set of 2-digit numbers from 00 to 99 followed or not by an exclamation mark
What are the most common regular expressions?
Regular expressions depend heavily on the type of text to be processed:
Lower case name: [a-z0-9_-]{3,16}
Date dd/mm/yyyy: \d{1,2}\/\d{1,2}\/\d{4}
Hexadecimal color: #?([A-Fa-f0-9]){3}(([A-Fa-f0-9]){3})?
E-mail address: [a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6}
Internet address:https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?
IP address: (?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)
Source code
dCode retains ownership of the "Regular Expression Search" source code. Except explicit open source licence (indicated Creative Commons / free), the "Regular Expression Search" algorithm, the applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, breaker, translator), or the "Regular Expression Search" functions (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) and all data download, script, or API access for "Regular Expression Search" are not public, same for offline use on PC, mobile, tablet, iPhone or Android app!
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Cite dCode
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Exporting results as a .csv or .txt file is free by clicking on the export icon
Cite as source (bibliography):
Regular Expression Search on dCode.fr [online website], retrieved on 2024-12-21,
