Keyboard shortcuts

Press or to navigate between chapters

Press S or / to search in the book

Press ? to show this help

Press Esc to hide this help

Exercise: Extract phone numbers

Given a text message fetch all the phone numbers:
Fetch numbers that look like 09-1234567
then also fetch +972-2-1234567
and maybe also 09-123-4567
This 123 is not a phone number.