Regular Expressions 101

Library entries

0
pcre2

Codegolf stay away from zero

Codegolf submission
Submitted by PlaceReporter99 - 4 hours ago
0
python

Author cite

Get author names from shitty import
Submitted by anonymous - 5 hours ago
0
pcre2

Estrazione numeri scheda mail generali

Come da titolo
Submitted by anonymous - 6 hours ago
0
pcre2

IIC++ Script Parsing Regex

Regex for parsing IIC++ script.
Submitted by Vu Tung Lam - 12 hours ago
0
dotnet

for killerswim

a
Submitted by anonymous - 18 hours ago
0
pcre2

入门学习

Submitted by anonymous - a day ago
0
pcre2

exclude square brackets

exclude square brackets
Submitted by tarek - 2 days ago
0
pcre2

YouTube link parser

Validate an URI to YouTube video.
Submitted by anonymous - 5 days ago

match valid JSON

Vote

26

Regular Expression
pcre

/
(?(DEFINE) # Note that everything is atomic, JSON does not need backtracking if it's valid # and this prevents catastrophic backtracking (?<json>(?>\s*(?&object)\s*|\s*(?&array)\s*)) (?<object>(?>\{\s*(?>(?&pair)(?>\s*,\s*(?&pair))*)?\s*\})) (?<pair>(?>(?&STRING)\s*:\s*(?&value))) (?<array>(?>\[\s*(?>(?&value)(?>\s*,\s*(?&value))*)?\s*\])) (?<value>(?>true|false|null|(?&STRING)|(?&NUMBER)|(?&object)|(?&array))) (?<STRING>(?>"(?>\\(?>["\\\/bfnrt]|u[a-fA-F0-9]{4})|[^"\\\0-\x1F\x7F]+)*")) (?<NUMBER>(?>-?(?>0|[1-9][0-9]*)(?>\.[0-9]+)?(?>[eE][+-]?[0-9]+)?)) ) \A(?&json)\z
/
x

Description

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Submitted by Mateon1 - 9 years ago