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Testing shows the presence, not the absence of bugs.
Edsger Dijkstra
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Edsger Dijkstra
Age: 72 †
Born: 1930
Born: May 11
Died: 2002
Died: August 5
Computer Scientist
Engineer
Mathematician
Physicist
Scientist
University Teacher
R'dam
Edsger Dijkstra
Edsger Wybe Dijkstra
Dijkstra
EWD
E.W. Dijkstra
Bugs
Testing
Programming
Absence
Presence
Shows
More quotes by Edsger Dijkstra
Mentally mutilated potential programmers beyond hope of regeneration.
Edsger Dijkstra
The use of COBOL cripples the mind its teaching should, therefore, be regarded as a criminal offense.
Edsger Dijkstra
If in physics there's something you don't understand, you can always hide behind the uncharted depths of nature. You can always blame God. You didn't make it so complex yourself. But if your program doesn't work, there is no one to hide behind. You cannot hide behind an obstinate nature. If it doesn't work, you've messed up.
Edsger Dijkstra
The computing scientist's main challenge is not to get confused by the complexities of his own making.
Edsger Dijkstra
If debugging is the process of removing software bugs, then programming must be the process of putting them in.
Edsger Dijkstra
Thank goodness we don't have only serious problems, but ridiculous ones as well.
Edsger Dijkstra
How do we convince people that in programming simplicity and clarity - in short: what mathematicians call elegance - are not a dispensable luxury, but a crucial matter that decides between success and failure?
Edsger Dijkstra
Besides a mathematical inclination, an exceptionally good mastery of one's native tongue is the most vital asset of a competent programmer.
Edsger Dijkstra
The art of programming is the art of organizing complexity.
Edsger Dijkstra
Production speed is severely slowed down if one works with half-time people who have other obligations as well. This is at least a factor of four probably it is worse.
Edsger Dijkstra
Teaching COBOL ought to be regarded as a criminal act.
Edsger Dijkstra
We shall do a much better programming job, provided that we approach the task with a full appreciation of its tremendous difficulty, provided that we stick to modest and elegant programming languages, provided that we respect the intrinsic limitations of the human mind and approach the task as Very Humble Programmers.
Edsger Dijkstra
We must be very careful when we give advice to younger people sometimes they follow it!
Edsger Dijkstra
Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it. And to make matters worse: complexity sells better.
Edsger Dijkstra
A convincing demonstration of correctness being impossible as long as the mechanism is regarded as a black box, our only hope lies in not regarding the mechanism as a black box.
Edsger Dijkstra
Computer science is no more about computers than astronomy is about telescopes.
Edsger Dijkstra
There is very little point in trying to urge the world to mend its ways as long as that world is still convinced that its ways are perfectly adequate.
Edsger Dijkstra
A most important, but also most elusive, aspect of any tool is its influence on the habits of those who train themselves in its use. If the tool is a programming language this influence is, whether we like it or not, an influence on our thinking habits.... A programming language is a tool that has profound influence on our thinking habits.
Edsger Dijkstra
Industry suffers from the managerial dogma that for the sake of stability and continuity, the company should be independent of the competence of individual employees.
Edsger Dijkstra
I mean, if 10 years from now, when you are doing something quick and dirty, you suddenly visualize that I am looking over your shoulders and say to yourself Dijkstra would not have liked this, well, that would be enough immortality for me.
Edsger Dijkstra