Confirmation dialog to quit app when press back button in Android

Validate the email address using Regex in Java

Using the Adapter Design Pattern in Java

Using Composite pattern in Java project

Using Decorator pattern in Java project

Using Registry pattern in Java project

Using Factory method pattern in Java project

Using Flyweight pattern in Java project

Using Proxy pattern in Java project

Using Chain of Responsibility pattern in Java project

Using Strategy Pattern in Java

Apply Observer pattern to build a Class Management program using Java

Sum of two large numbers in Java

PDF to DOCX using Python

PDF to TXT using Python

Remove password from PDF in Python.

Protect PDF file with password in Python

Split a pdf file into multiple pdf files

Merge multiple PDFs into a single PDF in Python

Delete pages from pdf file in Python

Rotate a PDF file in Python

Convert .py to .exe

Download Subtitles From Youtube in Python

Download all thumbnails of a Youtube video in Python

Download files with progress in Python