R Web Scraping Quick Start Guide

RegEx exercises

In this part, we are going to focus on hands-on exercises about RegEx rules. We will start by matching email addresses on a given text:

• Let's assume that we have text such as the following, and we would like to catch these email addresses:
  • Olgun Aydin, [e-mail], Gdansk, Poland
  • Olgun Aydin, [e-mail], Gdansk, Poland
  • Olgun Aydin, [e-mail], Gdansk, Poland
• Let's think about this problem. Email addresses have lowercase letters and can have some special characters such as dots
• The pattern looks like this: [some letters] OR [some letters, '.', some letters] @ [some letters] ["."] [some letters]
• We can write our regex rule as follows: (([a-z]+)|([a-z]+\.[a-z]+))@[a-z]+\.[a-z]+

Let's see ...