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Design Pattern Overview

What is Gang of Four (GoF) ? The book “Design Patterns: Elements of Reusable Object-Oriented Software.” authors are called as “Gang of Four” (GoF). This book first published in 1994 and four authors of this book are Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides. The “Gang of Four” (GoF) authors documented 23 classic software design patterns general solutions and Object-Oriented…