Regular Expressions 101

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Community Patterns

1

vozuskia (cs/sk)

Java 8
Addes a non-breaking space after any of the letters included in the [vozuskia] class.
Submitted by Manuel Souto Pico - 2 months ago
1

YouTube Video ID

Java 8
Gets the ID of a YouTube Video from any link to it.
Submitted by cheeseburger - 6 months ago
1

Parse Address - Prefecture

Java 8
get prefecture from Japanese address
Submitted by Gary Ascuy - 8 months ago
1

AWS EventBridge Scheduling Expressions

Java 8
This validates AWS EventBridge scheduling expressions using the rate() and cron() formats. It may not catch all invalid expressions, but it should properly validate all valid expressions, as demonstrated in the unit tests. Please let me know if I missed any valid expressions. Originally attempted ...
Submitted by Evan S Kaufman <evan@evanskaufman.com> - 8 months ago (Last modified 7 months ago)
1

IANA Media Type

Java 8
Parses an IANA Media Type value. Doesn't seem to capture repeating parameters, which is a bit of an edge case but valid I think - any suggestions on how to fix would be appreciated.
Submitted by scottbdr - 9 months ago
1

文件名称验证

Java 8
操作系统文件名称验证，参考了Windows，Linux，Mac
Submitted by 腾龙问天 - a year ago
1

verifyIPV6

Java 8
verificare indirizzo IPV6 (regole base)
Submitted by Luigi Piccinni - a year ago
2

Check Email Validity

Java 8
Regular expression to check the email syntax validity. Certainly requires improvement, but it's a good basis to work from. Work with Java and JavaScript.
Submitted by Alain TOMASIAN <alain.tomasian@kaptus.fr> - a year ago (Last modified a year ago)
1

Gradient for minecraft

Java 8
This is for my plugin project
Submitted by Trần Thế Anh - a year ago
1

Youtube Video ID

Java 8
Extract youtube video ID
Submitted by anonymous - a year ago (Last modified a year ago)
1

Extract text strings from repeating text fields followed by a suffix

Java 8
This regex expression is useful for extracting only the text string from a value in a column that may contain values from individual rows with repeat strings tagged with a suffix. For example - Row 1: "Sales (#1)", Row 2: "Sales Match (#2)". From the shared examples, this regex will extract the text...
Submitted by nilotpalc - a year ago
1

CSV

Java 8
Crude CSV regex to split only by characters surrounded by non-whitespace characters. Ignore that it dosen't highlight all of the other commas in the editor. If you select the g regex flag it will properly show here, but not work in Java. Credit to @merosity (Merosity#0135) on Discord!
Submitted by Merosity, regice202 - a year ago
1

Match many cases of 8601

Java 8
This is still a working in progress Need to do Unit Tests and search for more use cases Match partial cases of 8601 such as: missing offset missing time...
Submitted by jpmand - a year ago (Last modified a year ago)
1

Extract any link or endpoint

Java 8
Extract any link or endpoint from 1- HTML page source 2- HTTP responses 3- JS files Feel free to contact me on Telegram https://t.me/c4ir0 if you:...
Submitted by Cairo - a year ago (Last modified a year ago)
1

html <Title>

Java 8
htnle
Submitted by erichologist - a year ago
-2

Ascending and Descending order

Java 8
This regex is to match Ascending or descending order of 8 digit number
Submitted by anonymous - a year ago
-1

Capturing groups with suffix

Java 8
Capturing the content of column names which are duplicate in nature to extract the actual name and suffix ("right" / "left")
Submitted by anonymous - a year ago
-1

Dart relative import

Java 8
find dart relative import path
Submitted by sagarpanchal - a year ago
0

Cover dates from 2009 and older in French format and English

Java 8
Covering Dates starting from year 2009 and older in French and English Some of the valid Dates format April 2nd 2008 April 2 2008 April 02 2008...
Submitted by Francois-Alexandre Valade-Casaubon - a year ago
0

Java RegExMatch Example

Java 8
This is an example for stackoverflow
Submitted by anonymous - a year ago
123...11

Community Library Entry

1

Regular Expression
Java 8

"
^(?:rate[(](?:(?:1[ ]+(hour|minute|day))|(?:[0-9]+[ ]+(hours|minutes|days)))[)])|(?:cron[(](?:(?:(?:[0-5]?[0-9])|[*])(?:(?:[-](?:(?:[0-5]?[0-9])|[*]))|(?:[/][0-9]+))?(?:[,](?:(?:[0-5]?[0-9])|[*])(?:(?:[-](?:(?:[0-5]?[0-9])|[*]))|(?:[/][0-9]+))?)*)[ ]+(?:(?:(?:[0-2]?[0-9])|[*])(?:(?:[-](?:(?:[0-2]?[0-9])|[*]))|(?:[/][0-9]+))?(?:[,](?:(?:[0-2]?[0-9])|[*])(?:(?:[-](?:(?:[0-2]?[0-9])|[*]))|(?:[/][0-9]+))?)*)[ ]+(?:(?:[?][ ]+(?:(?:(?:[1]?[0-9])|(?:JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)|[*])(?:(?:[-](?:(?:[1]?[0-9])|(?:JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)|[*])(?:[/][0-9]+)?)|(?:[/][0-9]+))?(?:[,](?:(?:[1]?[0-9])|(?:JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)|[*])(?:(?:[-](?:(?:[1]?[0-9])|(?:JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)|[*])(?:[/][0-9]+)?)|(?:[/][0-9]+))?)*)[ ]+(?:(?:(?:[1-7]|(?:SUN|MON|TUE|WED|THU|FRI|SAT))[#][0-5])|(?:(?:(?:(?:[1-7]|(?:SUN|MON|TUE|WED|THU|FRI|SAT))L?)|[L*])(?:(?:[-](?:(?:(?:[1-7]|(?:SUN|MON|TUE|WED|THU|FRI|SAT))L?)|[L*]))|(?:[/][0-9]+))?(?:[,](?:(?:(?:[1-7]|(?:SUN|MON|TUE|WED|THU|FRI|SAT))L?)|[L*])(?:(?:[-](?:(?:(?:[1-7]|(?:SUN|MON|TUE|WED|THU|FRI|SAT))L?)|[L*]))|(?:[/][0-9]+))?)*)))|(?:(?:(?:(?:(?:[1-3]?[0-9])W?)|LW|[L*])(?:(?:[-](?:(?:(?:[1-3]?[0-9])W?)|LW|[L*]))|(?:[/][0-9]+))?(?:[,](?:(?:(?:[1-3]?[0-9])W?)|LW|[L*])(?:(?:[-](?:(?:(?:[1-3]?[0-9])W?)|LW|[L*]))|(?:[/][0-9]+))?)*)[ ]+(?:(?:(?:[1]?[0-9])|(?:JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)|[*])(?:(?:[-](?:(?:[1]?[0-9])|(?:JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)|[*])(?:[/][0-9]+)?)|(?:[/][0-9]+))?(?:[,](?:(?:[1]?[0-9])|(?:JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)|[*])(?:(?:[-](?:(?:[1]?[0-9])|(?:JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC)|[*])(?:[/][0-9]+)?)|(?:[/][0-9]+))?)*)[ ]+[?]))[ ]+(?:(?:(?:[12][0-9]{3})|[*])(?:(?:[-](?:(?:[12][0-9]{3})|[*]))|(?:[/][0-9]+))?(?:[,](?:(?:[12][0-9]{3})|[*])(?:(?:[-](?:(?:[12][0-9]{3})|[*]))|(?:[/][0-9]+))?)*)[)])$
"
g
Open regex in editor

Description

This validates AWS EventBridge scheduling expressions using the rate() and cron() formats.

It may not catch all invalid expressions, but it should properly validate all valid expressions, as demonstrated in the unit tests. Please let me know if I missed any valid expressions.

Originally attempted this using named capture groups and named back-references to reduce duplication. Unfortunately, named capture support is tricky, so they were all converted to duplicated non-capturing groups instead.

Submitted by Evan S Kaufman <evan@evanskaufman.com> - 8 months ago (Last modified 7 months ago)