find emails(emicha@mail.bg)

HTTP/1.0 404 Not Found Cache-Control: no-cache Content-Type: application/json {"validation_message":'...'} ...

Example: ANDA IVANOVA-KRIVONOGOVA

In string find regular expression or data type with limiters (start and end or summary count of symbols)

Any date that as a valid month, a valid date and a year composed of 4 numbers. You can change the '-' caracter to any divider you want.

replace-last-comma with semicolon similar to http://stackoverflow.com/questions/3829483/how-to-replace-last-occurrence-of-characters-in-a-string-using-javascript

A password regex that has to have 6 characters at minimum, not spaces allowed, and at least 1 special character, 1 uppercase letter, 1 lowercase letter and a digit

Выражение осуществялет поиск процента в строке вида: 10% 5-17% 25-74,3% 41,6-48% 3,5-27,9%

Check all the numbers are same in a string.

Regex for matching only Arabic letters characters

regex valid for json schema with http,https,ftp,sftp protocol

Validate IP address and IP address range to. xxx.xxx.xxx.xxx and xxx.xxx.xxx.xxx/xxx