寫這個系列的初衷是SAP Chengdu office有越來越多的應屆畢業生加入，這些新同事透過在大學的專業學習，具備了Java和JavaScript背景，但是進入SAP之後大家覺得ABAP沒有Java和JavaScript好學。
其實任何程式語言總是有很多相通之處，這個系列就是把這三種語言的很多知識點拿來橫向比較，即使只會其中一門，也能看懂這些post.

同時對於ABAP較之Java和JavaScript缺乏的一些feature和框架特性，例如閉包，函數語言程式設計，Spring依賴注入等，這些post裡面也透過應用層模擬的方式做了一些簡單嘗試:

全部文章list

1. Lazy Loading, Singleton and Bridge design pattern in JavaScript and in ABAP
2. Functional programming – Simulate Curry in ABAP
3. Functional Programming – Try Reduce in JavaScript and in ABAP
4. Simulate Mockito in ABAP
5. A simulation of Java Spring dependency injection annotation @Inject in ABAP
6. Singleton bypass Trap – ABAP and Java
7. Weak reference in ABAP and Java
8. Fibonacci Sequence in ES5, ES6 and ABAP
9. Java byte code and ABAP Load
10. How to write a “correct” program rejected by compiler: Exception handling in Java and in ABAP
11. An small example to learn Garbage collection in Java and in ABAP
12. String Template in ABAP, ES6, Angular and React
13. Try to access static private attribute via ABAP RTTI and Java Reflection
14. Local class in ABAP, Java and JavaScript
15. Integer in ABAP, Java and JavaScript
16. Covariance in Java and simulation in ABAP
17. Various Proxy Design Pattern implementation variants in Java, ABAP and JavaScript
18. Tag(Marker) Interface in ABAP and Java
19. Bitwise operation ( OR, AND, XOR ) on ABAP Integer
20. ABAP ICF handler and Java Servlet
21. ADBC and JDBC
22. Weak reference in ABAP and Java

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