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T h e T a o O f P r o g r a m m i n g
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T r a n s l a t e d B y
G e o f f r e y J a m e s
- 1 -
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T a b l e o f C o n t e n t s
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Book 1 -- The Silent Void
Book 2 -- The Ancient Masters
Book 3 -- Design
Book 4 -- Coding
Book 5 -- Maintenance
Book 6 -- Management
Book 7 -- Corporate Wisdom
Book 8 -- Hardware and Software
Book 9 -- Epilogue
- 2 -
T h e S i l e n t V o i d
B o o k O n e
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Thus spake the master programmer:
"When you have learned to snatch the error code from the trap
frame, it will be time for you to leave."
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1.1
Something mysterious is formed, born in the silent void. Waiting alone
and unmoving, it is at once still and yet in constant motion. It is
the source of all programs. I do not know its name, so I will call it
the Tao of Programming.
If the Tao is great, then the operating system is great. If the
operating system is great, then the compiler is great. If the compiler
is great, then the application is great. The user is pleased and their
is harmony in the world.
The Tao of Programming flows far away and returns on the wind of
morning.
1.2
The Tao gave birth to machine language. Machine language gave birth to
the assembler.
The assembler gave birth to the compiler. Now their are ten thousand
languages.
Each language has its purpose, however humble. Each language expresses
the Yin and Yang of software. Each language has its place within the
Tao.
But do not program in COBOL if you can avoid it.
1.3
In the beginning was the Tao. The Tao gave birth to Space and Time.
Therefore Space and Time are Yin and Yang of programming.
Programmers that do not comprehend the Tao are always running out of
time and space for there programs. Programmers that comprehend the
Tao always have enough time and space to accomplish their goals.
How could it be otherwise?
1.4
The wise programmer is told about Tao and follows it. The average
programmer is told about Tao and searches for it. The foolish
programmer is told about Tao and laughs at is.
If it were not for laughter, there would be no Tao.
The highest sounds are hardest to hear. Going forward is a way to
retreat. Great talent shows itself late in life. Even a perfect
program still has bugs.
- 3 -
T h e A n c i e n t M a s t e r s
B o o k T w o
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Thus Spake the Master Programmer:
"After three days without programming, life becomes meaningless."
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2.1
The programmers of old were mysterious and profound. We cannot fathom
their thoughts, so all we do is describe their appearance.
Aware, like a fox crossing the water. Alert, like a general on the
battlefield. Kind, like a hostess greeting her guests. Simple, like
uncarved blocks of wood. Opaque , like black pools in darkened caves.
Who can tell the secrets of their hearts and minds?
The answer exists only in Tao.
2.2
Grand Master Turing once dreamed that he was a machine. When he awoke
he exclaimed:
"I don't know whether I am Turing dreaming that I am a machine,
or a machine dreaming that I am Turing!."
2.3
A programmer from a very large computer company went to a software
conference and then returned to report to his manager, saying: "What
sort of programmers work for other companies? They behaved badly and
were unconcerned with appearances. There hair was long and unkept
and their clothes were wrinkled and old. They crashed out hospitality
suite and they made rude noises during my presentation."
The manager said: "I should have never sent you to the conference.
Those programmers live beyond the physical world. They consider life
absurd, an accidental coincidence. They come and go without knowing
limitations. Without a care, they live only for their programs. Why
should they bother with social conventions?
They are alive within the Tao."
2.4
A novice asked the Master: "Here is a programmer that never designs,
documents or tests his programs. Yet all who know him consider him
one of the best programmer in the world. Why is this?"
The Master replies: "That programmer has mastered the Tao. He has
gone beyond the need for design; he does not become angry when the
system crashes, but accepts the universe without concern. He has gone
beyond the need for documentation; he no longer cares if anyone else
sees his code. He has gone beyond the need for testing; each of his
programs are perfect within themselves, serene and elegant, their
purpose self-evident. Truly, he has entered the mystery of Tao."
- 4 -
D e s i g n
B o o k T h r e e
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Thus spake the Master Programmer:
"When the program is being tested, it is too late to make design
changes."
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3.1
There once was a man who went to a computer trade show. Each day as
he entered, the man told the guard at the door:
"I am a great thief, renowned for my feats of shoplifting. Be
forewarned, for this trade show shall not escape unplundered."
This speech disturbed the guard greatly, because there were millions
of dollars of computer equipment inside, so he watched the man
carefully. But the man merely wandered from booth to booth, humming
quietly to himself.
When the man left, the guard took him aside and searched his clothes,
but nothing was to be found.
On the next day of the trade show, the man returned and chided the
guard saying: "I escaped with a vast booty yesterday, but today will
be even better." So the guard watched him ever more closely, but to
no avail.
On the final day of the trade show, the guard could restrain his
curiosity no longer. "Sir Thief," he said, "I am so perplexed, I
cannot live in peace. Please enlighten me. What is it that you are
stealing?"
The man smiled. "I am stealing ideas," he said.
3.2
There once was a master programmer who wrote unstructured programs. A
novice programmer, seeking to imitate him, also began to write
unstructured programs. When the novice asked the master to evaluate
his progress, the master criticized him for writing unstructured
programs, saying "What is appropriate for the master is not
appropriate for the novice. You must understand Tao before
transcending structure."
3.3
There was once a programmer who was attached to the court of the
warlord of Wu. The warlord asked the programmer: "Which is easier to
design: an accounting package or an operating system?"
"An operating system," replied the programmer.
The warlord uttered an exclamation of disbelief. "Surely an
accounting package is trivial next to the complexity of an operating
system," he said.
- 5 -
"Not so," said the programmer, "when designing an accounting package,
the programmer operates as a mediator between people having different
ideas: how it must operate, how its reports must appear, and how it
must conform to the tax laws. By contrast, an operating system is not
limited by outside appearances. When designing an operating system,
the programmer seeks the simplest harmony between machine and ideas.
This is why an operating system is easier to design."
The warlord of Wu nodded and smiled. "That is all good and well, but
which is easier to debug?"
The programmer made no reply.
3.4
A manager went to the master programmer and showed him the
requirements document for a new application. The manager asked the
master: "How long will it take to design this system if I assign five
programmers to it?"
"It will take one year," said the master promptly.
"But we need this system immediately or even sooner! How long will it
take if I assign ten programmers to it?"
The master programmer frowned. "In that case, it will take two
years."
"And what if I assign a hundred programmers to it?"
The master programmer shrugged. "Then the design will never be
completed," he said.
- 6 -
C o d i n g
B o o k F o u r
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Thus spake the master programmer:
"A well-written program is its own heaven; a poorly-written
program is its own hell."
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4.1
A program should be light and agile, its subroutines connected like a
string of pearls. The spirit and intent of the program should be
retained throughout. There should be neither too little or 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.
4.2
A novice asked the master: "I have a program that sometime runs and
sometimes aborts. I have followed the rules of programming, yet I am
totally baffled. What is the reason for this?"
The master replied: "You are confused because you do not understand
Tao. Only a fool expects rational behavior from his fellow humans.
Why do you expect it from a machine that humans have constructed?
Computers simulate determinism; only Tao is prefect.
The rules of programming are transitory; only Tao is eternal.
Therefore you must contemplate Tao before you receive enlightenment."
"But how will I know when I have received enlightenment?" asked the
novice.
"Your program will then run correctly," replied the master.
4.3
A master was explaining the nature of Tao of to one of his novices,
"The Tao is embodied in all software -- regardless of how
insignificant," said the master.
"Is the Tao in a hand-held calculator?" asked the novice.
"It is," came the reply.
- 7 -
"Is the Tao in a video game?" continued the novice.
"It is even in a video game," said the master.
"And is the Tao in the DOS for a personal computer?"
The master coughed and shifted his position slightly. "The lesson
is over for today," he said.
4.4
Prince Wang's programmer was coding software. His fingers danced upon
the keyboard. The program compiled without an error message, and the
program ran like a gentle wind.
"Excellent!" the Prince exclaimed, "Your technique is faultless!"
"Technique?" said the programmer turning from his terminal, "What I
follow is Tao -- beyond all techniques! When I first began to program
I would see before me the whole problem in one mass. After three
years I no longer saw this mass. Instead, I used subroutines. But now
I see nothing. My whole being exists in a formless void. My senses
are idle. My spirit, free to work without plan, follows its own
instinct. In short, my program writes itself. True, sometimes there
are difficult problems. I see them coming, I slow down, I watch
silently. Then I change a single line of code and the difficulties
vanish like puffs of idle smoke. I then compile the program. I sit
still and let the joy of the work fill my being. I close my eyes for
a moment and then log off."
Prince Wang said, "Would that all of my programmers were as wise!"
- 8 -
M a i n t e n a n c e
B o o k F i v e
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Thus spake the master programmer:
"Though a program be but three lines long, someday it will have to
be maintained."
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5.1
A well-used door needs no oil on its hinges.
A swift-flowing stream does not grow stagnant.
Neither sound nor thoughts can travel through a vacuum.
Software rots if not used.
These are great mysteries.
5.2
A manager asked a programmer how long it would take him to finish
the program on which he was working. "I will be finished tomorrow,"
the programmer promptly replied.
"I think you are being unrealistic," said the manager, "Truthfully,
how long will it take?"
The programmer thought for a moment. "I have some features that I
wish to add. This will take at least two weeks," he finally said.
"Even that is too much to expect," insisted the manager, "I will be
satisfied if you simply tell me when the program is complete."
The programmer agreed to this.
Several years later, the manager retired. On the way to his
retirement lunch, he discovered the programmer asleep at his
terminal. He had been programming all night.
5.3
A novice programmer was once assigned to code simple financial
package.
The novice worked furiously for many days, but when his master
reviewed his program, he discovered that it contained a screen
editor, a set of generalized graphics routines, an artificial
intelligence interface, but not the slightest mention of anything
financial.
When the master asked about this, the novice became indignant.
"Don't be so impatient," he said, " I'll put in the financial stuff
eventually."
5.4
Does a good farmer neglect a crop he has planted?
Does a good teacher overlook even the most humble student?
Does a good father allow a single child to starve?
Does a good programmer refuse to maintain his code?
- 9 -
M a n a g e m e n t
B o o k S i x
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Thus spake the master programmer:
"Let the programmer be many and the managers few -- then all will
be productive."
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6.1
When managers hold endless meetings, the programmers write games.
When accountants talk of quarterly profits, the development budget
is about to be cut. When senior scientists talk blue sky, the clouds
are about to roll in.
Truly, this is not the Tao of Programming.
When managers make commitments, game programs are ignored. When
accountants make long-range plans, harmony and order are about to
be restored. When senior scientists address the problems at hand,
the problems will soon be solved.
Truly, this is the Tao of Programming.
6.2
Why are programmers non-productive? Because their time is wasted
in meetings.
Why are programmers rebellious? Because the management interferes
to much.
Why are the programmers resigning one by one? Because they are
burnt out.
Having worked for poor management, they no longer value their jobs.
6.3
A manager was about to be fired, but a programmer who worked for
him invented a new program that became popular and sold well. As
a result, the manager retained his job.
The manager tries to give the programmer a bonus, but the programmer
refused it, saying, "I wrote the program because I thought it was
an interesting concept, and thus I expect no reward."
The manager upon hearing this remarked, "This programmer, though he
holds a position of small esteem, understands well the proper duty
of an employee. Lets promote him to the exalted position of
management consultant!"
But when told this, the programmer once more refused, saying,
"I exist so that I can program. If I were promoted, I would do
nothing but waste everyone's time. Can I go now? I have a program
that I'm working on."
- 10 -
6.4
A manager went to his programmers and told them: "As regards to
your work hours: you are going to have to come in at nine in the
morning and leave at five in the afternoon." At this, all of them
became angry and several resigned on the spot."
So the manager said: "All right, in that case you may set your own
working hours, as long as you finish your projects on schedule."
The programmers, now satisfied, began to come in at noon and work
to the wee hours of the morning.
- 11 -
C o r p o r a t e W i s d o m
B o o k S e v e n
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Thus spake the master programmer:
"You can demonstrate a program for a corporate executive, but
you can't make him computer literate."
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7.1
A novice asked the master: "In the east there is a great tree-
structure that men call 'Corporate Headquarters'. It is bloated
out of shape with vice presidents and accountants. It issues a
multitude of memos, each saying 'Go, Hence!' or 'Go, Hither!' and
nobody knows what is meant. Every year new names are put onto the
branches, but all to no avail. How can such an unnatural entity
exist?"
The master replies: "You perceive this immense structure and are
disturbed that it has no rational purpose. Can you not take
amusement from its endless gyrations? Do you not enjoy the
untroubled ease of programming beneath its sheltering branches?
Why are you bothered by its uselessness?"
7.2
In the east there is a shark which is larger than all other fish.
It changes into a bird whose wings are like clouds filling the sky.
When this bird moves across the land, it brings a message from
Corporate Headquarters. This message it drops into the midst of the
programmers, like a seagull making its mark upon the beach. Then the
bird mounts on the wind and, with the blue sky at its back, returns
home.
The novice programmer stares in wonder at the bird, for he
understands it not. The average programmer dreads the coming of the
bird, for he fears its message. The master programmer continues to
work at his terminal, for he does not know that the bird has come
and gone.
7.3
The Magician of the Ivory Tower brought his latest invention for
the master programmer to examine. The magician wheeled a large
black box into the master's office while the master waited in
silence.
"This is an integrated, distributed, general-purpose workstation,"
began the magician, "ergonomically designed with a proprietary
operating system, sixth generation languages, and multiple state of
the art user interfaces. It took my assistants several hundred man
years to construct. Is it not amazing."
The master raised his eyebrows slightly. "It is indeed amazing," he
said.
"Corporate Headquarters has commanded," continued the magician,
"that everyone use this workstation as a platform for new programs.
Do you agree to this?"
- 12 -
"Certainly," replied the master, " I will have it transported to the
data center immediately!" And the magician returned to his tower,
well pleased.
Several days later, a novice wandered into the office of the master
programmer and said, "I cannot find the listing for my new program.
Do you know where it might be?"
"Yes," replied the master, "the listings are stacked on the platform
in the data center."
7.4
The master programmer moves form program to program without fear.
No change in management can harm him. He will not be fired, even if
the project is cancelled. Why is this? He is filled with Tao.
- 13 -
H a r d w a r e a n d S o f t w a r e
B o o k E i g h t
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Thus spake the master programmer:
"Without the wind, the grass does not move. Without software,
hardware is useless."
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8.1
A novice asked the master: "I perceive that one computer company is
much larger than all others. It towers above its competition like a
giant among dwarfs. Any one of its divisions could comprise an entire
business. Why is this so?"
The master replied, "Why do you ask such foolish questions? That
company is large because it is large. If it only made hardware,
nobody would buy it. If it only made software, nobody would use it.
If it only maintained systems, people would treat it like a servant.
But because it combines all of these things, people think it one of
the gods! By not seeking to strive, it conquers without effort."
8.2
A master programmer passed a novice programmer one day. The master
noted the novice's preoccupation with a hand-held computer game.
"Excuse me", he said, "may I examine it?"
The novice bolted to attention and handed the device to the master. I
see that the device claims to have three levels of play: Easy, Medium
and Hard", said the master. "Yet every such device has another level
of play, where the device seeks not to conquer the human, nor to be
conquered by the human."
"Pray, great master", implored the novice, "how does one find this
mysterious settings?"
The master dropped the device to the ground and crushed it under
foot. And suddenly the novice was enlightened.
8.3
There was once a programmer who worked upon microprocessors. "Look at
how well off I am here," he said to a mainframe programmer who came
to visit, "I have my own operating system and file storage device. I
do not have to share my resources with anyone. The software is self-
consistant and easy-to-use. Why do you not quit your present job and
join me here?"
The mainframe programmer then began to describe his system to his
friend, saying "The mainframe sits like an ancient sage meditating in
the midst of the data center. Its disk drives lie end-to-end like a
great ocean of machinery. The software is as multifaceted as a
diamond, and as convoluted as a primeval jungle. The programs, each
unique, move through the system like a swift-flowing river. That is
why I am happy where I am."
The microcomputer programmer, upon hearing this, fell silent. But the
two programmers remained friends until the end of their days.
- 14 -
8.4
Hardware met Software on the road to Changtse. Software said: "You
are Yin and I am Yang. If we travel together we will become famous
and earn vast sums of money." And so the set forth together, thinking
to conquer the world.
Presently they met Firmware, who was dressed in tattered rage and
hobbled along propped on a thorny stick. Firmware said to them: "The
Tao lies beyond Yin and Yang. It is silent and still as a pool of
water. It does not seek fame, therefore nobody knows its presence. It
does not seek fortune, for it is complete within itself. It exists
beyond space and time."
Software and Hardware , ashamed, returned to their homes.
- 15 -
E p i l o g u e
B o o k N i n e
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Thus spake the Master Programmer:
"Time for you to leave."
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