Regex, short for Regular Expression, is a powerful tool for working with text data. It allows you to search, manipulate and extract patterns from text data. In this blog post, we will cover the basics of regex and how to use Regex 101 to practice and test the regex patterns.

What is Regex?

Regex is a sequence of characters that define a search pattern. It is used to match and manipulate text data. Regex is supported by most programming languages and text editors.
Regex is a declarative language, meaning that it defines what patterns you want to match, rather than how to match them. It uses a combination of literal characters and metacharacters to create patterns.

Regex 101

Regex 101 is an online tool that allows you to practice and test regular expressions (regex) against text data. In this blog post, we will cover how to use Regex 101 to practice and test your regex patterns.

Getting Started with Regex 101

To get started with Regex 101, go to the Regex 101 website. You will see a text box where you can enter your text data, and a regex editor where you can write your regex pattern.

Entering Text Data

To enter your text data, simply paste it into the text box on the left side of the screen. You can enter any text data that you want to test your regex pattern against.
For example, let’s say you want to test your regex pattern against the following text data:

Writing Your Regex Pattern

To write your regex pattern, use the regex editor on the right side of the screen. You can write your regex pattern using the syntax and metacharacters that we covered in the previous blog post.
For example, let’s say you want to match all occurrences of the word “Lorem” in the text data. You can write the following regex pattern:

Testing Your Regex Pattern

To test your regex pattern against the text data, click on the “Test String” button. Regex 101 will highlight all matches of your regex pattern in the text data.

Exploring Match Results

Regex 101 allows you to explore the match results of your regex pattern. You can see which parts of the text data were matched by your regex pattern, and you can also see which groups were captured by your regex pattern.
To explore the match results, click on the “Match Information” button. This will display a table showing all matches of your regex pattern in the text data.
Regex 101 is a powerful tool for practicing and testing your regex patterns against text data. By entering your text data and writing your regex pattern in the online editor, you can quickly test and refine your regex patterns. With the help of Regex 101, you can become more proficient at using regular expressions to work with text data.
The Data School
Author: The Data School