Trying to understand the two digit lookup.

Validates Israeli phone numbers. Accounts for the presence/absence of the 972 country code (with or without the plus sign or parentheses), and the proper formatting of area codes based on the presence/absence of the country code. Allows subdivision using spaces, dashes, periods, or no subdivision.

Use for Ukraine cities telephon number (not mobile). Example: 0442565656 (044)1565656 (05656)156-56-56 156-56-56

username is 4-32 characters long no _,- or . at the beginning no _ or _. or . or .. or .- or _- inside no _,- or . at the end ^(?=.{4,32}$)(?![.-])(?!.*[.]{2})[a-zA-Z0-9.-]+(?<![.])$...

a robust pattern to remove ordinal suffixes from numbers, eg. '22nd'->'22' supports: singles: 1st, 2nd, 3rd, 4th teens: 11th, 12th, 13th, 14th

https

parse the log line generated by fortigate 60B

Parse ogn-flavored aprs messages, here especially receiver beacons. source: https://github.com/svoop/ogn_client-ruby

To check a password between 5 to 10 characters which contain at least one lowercase letter, one uppercase letter, one numeric digit, and one special character.

Accept char and integers and not accept for any kind of sympol or spacs