Accepts only integer or Flating values upto 3 decimals. To accept n decimals change (1,n)

nao

This regex checks if a user has input 4 digit year integer.

This simple regex checks if a user has input correct YYYY format.

Validates that a DNS hostname is well-formed only. You will still need to check that the overall length of the hostname, including the implied trailing "." (if not present), does not exceed 255 bytes.

Pattern used to filter URL origin (protocol:host) for yFrame.

solution for matching

for [d:] and [q:]

find file name with file extension

parses user/repo

Complicated Example changing 2 values in a found string