RPN Calculator

If you need a reverse Polish notation calculator, you can use xcalc command with -rpn option. And don't forget to set PATH to include /usr/openwin/bin.

OS/2 also has a RPN calculator called RPCALC. You can download it from Hobbes web server under the directory /pub/os2/apps/calc. You will need EMX to run it. You'd better install EMX using WarpIN installer. Or even better, NH48S, a very functional alfa of a Reverse Polish Notation calculator for OS/2. It is very similar to the HP48 made by Hewlett Packard.

Holism: the position that the whole is often greater than the sum of its parts.

We should appreciate the effort that puts things together.

The best application of holism is stock market.

Thinking recursively requires you to think holistically. In the recursive domain, reductionism is the enemy of understanding and invariably gets in the way.


在學習電腦語言時，讀到了兩個觀念：reductionism 以及 holism. 前者認為一件事物可以藉著瞭解組成它的各個部份而被瞭解；後者認為事物的整體經常是大於各個部份的總合。程式設計師在學習程式設計時，經常要交錯的使用這兩個互相對立的觀點。修行也是如此。因為偏於修止，於境暗昩，謂之沉沒，此時宜修策舉相；若心高舉，則應修厭背相，使心沉靜。
然而，若是使用遞迴的技巧，則 reductionism 會成為瞭解程式的敵人，必須讓自己完全以 holism 的觀點來思考。此時就跟捨的法門很類似了。

Programming Abstractions in C

by Eric S. Roberts



a standard version: (the unix-xwindows version cannot be installed on Debian)

1. 必須使用 csh
2. 將 standard.shar 下載至 /opt
3. sh standard.shar
4. cd cslib
5. make
6. cp gccx /usr/local/bin
7. cp cslib.a /usr/lib

gccx 是一個 csh 的 script, 執行時會設定路徑，所以使用 gccx 也要用 csh.


5 ways you can learn programming faster:

1. Look at the example code.
2. Run it.
3. Write your own code as soon as possible.
4. Learn to use a debugger(dbx).
5. Seek out more sources.