Update Lerntagebuch.md

Lerntagebuch.md

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 # My learning dairy for programming methods and programming tools.
 
-## SU 01 (21.10.2021)
+## SU 01 (24.10.2023)
 
 ### Takeaway
 - Introduction to the instructor and the course:
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 ---
 ## SU 03 (07.11.2023)
+
+### Takeaway
+- Design Patterns:
+  - Definition: Reusable solutions to common software design problems.
+  - Advantages:
+    - Increased code reuse
+    - Improved flexibility and adaptability
+    - Improved readability and maintainability
+  - Disadvantages:
+    - Learning curve
+    - Misuse
+  - Application:
+    - To solve common software design problems
+    - To improve the quality of software
+  - Categories of design patterns:
+    - Creational patterns:
+      - Define how objects are created.
+      - Examples: Singleton, Factory Method, Abstract Factory, Builder
+    - Structural patterns:
+      - Describe how objects are composed to form larger structures.
+      - Examples: Adapter, Bridge, Composite, Decorator, Facade, Flyweight
+    - Behavioral patterns:
+      - Describe how objects interact with each other.
+      - Examples: Chain of Responsibility, Command, Iterator, Mediator, Observer, Strategy, Template Method
+- IDEs:
+  - History:
+    - First programming tools in the 1960s
+    - Development of IDEs in the 1980s
+  - Definition:
+    - Integrated development environment
+    - Bundles various tools for software development
+  - Examples:
+    - Eclipse
+    - IntelliJ IDEA
+    - Visual Studio
+  - Automation:
+    - IDEs can automate many tasks in software development
+    - Automated refactorings: Automated changes to code without changing functionality
+    - Debugging: Error detection in code
+
+### Perception
+
+ I have learned how to use a debugger to find and fix errors in my code. I can now use a debugger to improve my code and collaborate with others in group projects.
+
+### Repetition
+
+ IDEs, or Integrated Development Environments, are software tools that make software development easier. They provide a variety of features, including a text editor, a compiler or interpreter, a debugger, and version control. IDEs can significantly improve the productivity of software developers.
+
+### Feedback
+
+---