add readme for builder design pattern

saadati944 · Apr 18, 2021 · b253691 · b253691
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diff --git a/README.md b/README.md
@@ -46,6 +46,7 @@ Also if you know another algorithm or data structure that was not in here, creat
 - [Design patterns](./design_patterns)
   - [Creational patterns](./design_patterns/creational_patterns)
     - [Abstract factory pattern](./design_patterns/creational_patterns/abstract_factory_pattern)
+    - [Builder pattern](./design_patterns/creational_patterns/builder_pattern)
 
 # Contributing
 

diff --git a/design_patterns/creational_patterns/builder_pattern/README.md b/design_patterns/creational_patterns/builder_pattern/README.md
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+# Builder design pattern
+
+![builder1](https://upload.wikimedia.org/wikipedia/commons/8/87/W3sDesign_Builder_Design_Pattern_UML.jpg)
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+[read more in wikipedia](https://en.wikipedia.org/wiki/Builder_pattern)
+
+The builder pattern is a design pattern designed to provide a flexible solution to various object creation problems in object-oriented programming. The intent of the Builder design pattern is to separate the construction of a complex object from its representation. It is one of the Gang of Four design patterns.