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De - Pt| Proverbs, aphorisms, quotations (English) | by Linux fortune |
| A program should be light and agile, its subroutines connected like a strings of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little nor too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity. A program should follow the 'Law of Least Astonishment'. What is this law? It is simply that the program should always respond to the user in the way that astonishes him least. A program, no matter how complex, should act as a single unit. The program should be directed by the logic within rather than by outward appearances. If the program fails in these requirements, it will be in a state of disorder and confusion. The only way to correct this is to rewrite the program. -- Geoffrey James, "The Tao of Programming" | |
| ... an anecdote from IBM's Yorktown Heights Research Center. When a programmer used his new computer terminal, all was fine when he was sitting down, but he couldn't log in to the system when he was standing up. That behavior was 100 percent repeatable: he could always log in when sitting and never when standing. Most of us just sit back and marvel at such a story; how could that terminal know whether the poor guy was sitting or standing? Good debuggers, though, know that there has to be a reason. Electrical theories are the easiest to hypothesize: was there a loose with under the carpet, or problems with static electricity? But electrical problems are rarely consistently reproducible. An alert IBMer finally noticed that the problem was in the terminal's keyboard: the tops of two keys were switched. When the programmer was seated he was a touch typist and the problem went unnoticed, but when he stood he was led astray by hunting and pecking. -- "Programming Pearls" column, by Jon Bentley in CACM February 1985 | |
| Age before beauty; and pearls before swine. -- Dorothy Parker | |
| A definition of teaching: casting fake pearls before real swine. -- Bill Cain, "Stand Up Tragedy" | |
| Education is the process of casting false pearls before real swine. -- Irwin Edman | |
