Rejects first symbol if 0 and all other non number (doesn't includes .123 )

Parsing example

Match anything inside double quote string and set the first capture group with the content

Matches chorus of Never Going to Give You Up

Telegram Markdown V2's bold (`) can be escaped by using \`. RegExp to validate it and get the actual contents inside.

Data 100 Regular Expressions, adapted from Princeton

Get domain name from URL

Extract time from text

Note: replace the "\." with "\\." if you paste this on your java. The regex will match if the package name is valid. example: my.new.hello.world.app Supports: a-z 0-9 and underscore Supports multiple dots

Extract Amount and Date from Paystub

可以用来替换企业名称中的中英文括号 eg: 阿里巴巴（中国）股份 阿里巴巴(中国)股份

streets with one or more names with unicode characters in python

Matches various versions of build file filenames from our jenkins builds

Validades cron job time specification

This is a compound operator that takes a variable and a Example: local x = 9 x f(math.max)= 10 compiles to...

Reference http://wiki.hash.kr/index.php/SHA256

A general regular expression that uses the keywords 'Facebook' and 'id' to collect strings that contain Facebook IDs. Also, added an additional condition to where if there's a long numeric string it will be match a group given that, 'Facebook' is within the string. This is a special use-case and can...

If for whatever reason there isn't a delimiter within your data to for storing your SSNs you should be able to use this regular expression to capture 9 digit strings within data. You might need to add special keywords to filter out false positives.

Here's a regular expression to handle a specific year in the different forms of dates: YYYY-MM-DD DD-MM-YYYY MM-DD-YYYY ...

converts HTML: This is hyperlink. You can click this. to Markup: This is hyperlink. You can click this. which renders like this: This is hyperlink. You can click this.