Inroduction to REGEX

Blog url: https://www.nowenkottage.com/regex

Please find the project structure below

regex_blog/
├── large_codebase/
│   ├── lib/
│   │   ├── pattern/
│   │   │   └── phone.js
│   │   └── validator/
│   │       └── phone.js
│   ├── main.js
│---usecases/
│   └── exercise.js
├── .gitignore
├── ex.js
├── ex.py
├── README.md
└── RegexExamples.java

Running the Projects

This repository contains three runnable components:

1. Regex examples (JavaScript, Python, and Java)
2. Large codebase example (modular pattern + validator structure)
3. Use-case demonstrations

1. Regex Examples

Available in all three languages: ex.js, ex.py, and RegexExamples.java

JavaScript

cd ./regex_blog
node ex.js

Python

(Recommended: use a virtual environment such as Conda)

conda activate <env_name>
python ex.py

Java

Ensure the JDK is installed, then:

javac RegexExamples.java
java RegexExamples

2. Large Codebase Example

cd ./regex_blog/large_codebase
node main.js

3. Use Case Examples

cd ./regex_blog/usecases
node exercise.js