Computer Science @CompSciFact Twitter profile

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Computer Science

@CompSciFact

1 year

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6 years

Q: Why can’t programmers tell the difference between Halloween and Christmas? A: Because oct 31 = dec 25. #oldprogrammerjoke

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3 years

“The S in IoT stands for security.”

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1 month

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10 years

2015 is a palindrome in binary: 11111011111

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5 years

Q: Why can't programmers tell the difference between Halloween and Christmas? A: Because oct 31 = dec 25. #oldiebutgoodie

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7 years

'The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise' - Edsger Dijkstra

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6 months

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1 year

Is any other sculpture so associated with a CS textbook?

ali

@endingwithali

1 year

Visited a very special sculpture

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Computer Science

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6 years

You might be a computer scientist if you think 1024 is a nice, round number.

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@CompSciFact

2 months

The dragon book has become the dragonfly book.

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Computer Science

@CompSciFact

9 years

'The hardest problem in computer science is not being an opinionated jerk about everything.' -- @ntakayama

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10 years

RT @KenScambler : Legacy. Looks easy; should be done in half an hour I reckon. http://t.co/XYjIzKtT71

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Computer Science

@CompSciFact

7 years

If you look very carefully, the title says "Numerical methods that usually work." The word "usually" is in light gray type. In the original hardback version, "usually" wasn't printed per se, but pressed into the cover while the other letters were colored silver.

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Computer Science

@CompSciFact

4 years

'Just because you've implemented something doesn't mean you understand it.' -- Brian Cantwell Smit

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4 years

'Unix is user-friendly; it's just picky about who its friends are.'

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1 year

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7 years

"What if there isn’t actually any use for a distributed ledger at all?"

Ten years in, nobody has come up with a use for blockchain | HackerNoon

(Sequel here: Blockchain is not only crappy technology but a bad vision for the future.)

hackernoon.com

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Computer Science

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5 years

'The idea that people knew a thing or two in the '70s is strange to a lot of young programmers.' -- Donald Knuth

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4 years

A Complete Guide to LLVM for Programming Language Creators

A Complete Guide to LLVM for Programming Language Creators

We'll explain the concepts underlying LLVM IR, and how you can use the LLVM C++ API in your programming language's compiler.

mukulrathi.com

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Computer Science

@CompSciFact

7 years

Fallacies of distributed computing 1. The network is reliable. 2. Latency is zero. 3. Bandwidth is infinite. 4. The network is secure. 5. Topology doesn't change. 6. There is one administrator. 7. Transport cost is zero. 8. The network is homogeneous.

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@CompSciFact

4 years

John von Neumann invented merge sort in 1945. It requires O(n log n) comparisons.

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3 years

'Learning to program teaches you how to think. Computer science is a liberal art.' -- Steve Jobs

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6 years

'Fancy algorithms are slow when n is small, and n is usually small.' -- Rob Pike

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4 years

When you see a clever algorithm presented in a CS class in 20 minutes, it can be intimidating. You reasonably think "I could never come up with anything like that." But the person who did come up with it spent more than 20 minutes thinking about it. Maybe months or years.

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Computer Science

@CompSciFact

2 years

Why can't programmers tell Halloween from Christmas? Because oct 31 = dec 25. (The joke worked better when programmers were more accustomed to octal.)

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6 years

There's a new programming language, and now programming is going to be easy.

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8 years

'... the best programs are the ones written when the programmer is supposed to be working on something else.' -- Melinda Varian

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3 years

'Unix is user-friendly; it's just picky about who its friends are.'

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1 year

Faster linear algebra using thermodynamics

Thermodynamic Linear Algebra

Linear algebraic primitives are at the core of many modern algorithms in engineering, science, and machine learning. Hence, accelerating these primitives with novel computing hardware would have...

arxiv.org

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Computer Science

@CompSciFact

5 years

RSA algorithm in a poem, by Daniel G. Treat. Take two large prime numbers, q and p. Find the product n, and the totient ϕ . If e and ϕ have GCD one and d is e's inverse, then you're done! For sending m raised to the e reduced mod n gives secre-c.

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3 years

“If your config file syntax becomes Turing complete, stop now and cancel the project.” — J. B. Crawford

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6 years

"Why does CS count from 0? Nobody does that." How many years old are you during your first year of life? At what age do you enter your second decade? Are we in the 20th century or the 21st century?

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4 years

A distributed system is one in which the failure of a computer you didn't even know existed can render your own computer unusable. - Lamport

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4 years

'One of my most productive days was throwing away 1000 lines of code.' -- Ken Thompson

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3 years

'Hardware eventually fails. Software eventually works.' -- Michael Hartung

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6 years

'The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise' - Edsger Dijkstra

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5 years

'Hardware eventually fails. Software eventually works.' -- Michael Hartung

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5 years

Swap x and y without using a third variable. x = x^y y = y^x x = x^y where ^ is XOR.

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7 years

'The hardest problem in computer science is not being an opinionated jerk about everything.' -- @ntakayama

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7 years

'So much complexity in software comes from trying to make one thing do two things.' -- Ryan Singer

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3 months

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3 years

'Code is like poetry; most of it shouldn't have been written.' -- @MetaThis

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4 years

'Fancy algorithms are slow when n is small, and n is usually small.' -- Rob Pike

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6 years

Asking what is the best programming language is like asking what is the best chess move. Neither question has an answer without some context.

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7 years

There's a new record for the largest known prime. Written in binary, it is a string of 77,232,917 ones.

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@CompSciFact

8 years

The day of your birth is your 0th birthday. It’s not just computer scientists who count from zero.

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4 years

'Learning to program teaches you how to think. Computer science is a liberal art.' -- Steve Jobs

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6 years

'Unix is user-friendly; it's just picky about who its friends are.'

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7 years

"If you don't run experiments before you start designing a new system, your entire system will be an experiment." -- Mike Williams

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3 years

Goodhart's law: When a metric becomes a target, it ceases to be a good metric.

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2 months

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7 years

"Computers in the future may weigh no more than 1.5 tons." -- Popular Mechanics, 1949

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9 years

max(r, s) = (r + s + |r - s|)/2 min(r, s) = (r + s - |r - s|)/2

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4 years

Objects are data with functions. Closures are functions with data.

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8 years

'Hardware eventually fails. Software eventually works.' -- Michael Hartung

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6 years

'Thinking doesn't guarantee that we won't make mistakes. But not thinking guarantees that we will.' -- Leslie Lamport

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5 months

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8 years

'The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise' - Edsger Dijkstra

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5 years

That awkward moment when you realize you can't find the bug in your program because there isn't one. Your program is right but your expectations are wrong.

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6 years

'Unix is user-friendly; it's just picky about who its friends are.'

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5 years

C code to test whether an unsigned integer u > 0 is a power of 2: (u & (u-1)) == 0

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4 years

Objects are data with functions. Closures are functions with data.

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3 years

'Programming languages teach you not to want what they don't provide.' -- Paul Graham

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3 years

Algebra, Topology, Differential Calculus, and Optimization Theory For Computer Science and Machine Learning 1,962 page PDF

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4 years

'Hardware eventually fails. Software eventually works.' -- Michael Hartung

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6 years

Computer scientist: "Unfortunately there's no known algorithm for solving this problem." Cryptographer: "Cool!"

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7 years

'The idea that people knew a thing or two in the '70s is strange to a lot of young programmers.' -- Donald Knuth

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5 years

'Unix is user-friendly; it's just picky about who its friends are.'

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4 years

“An algorithm is a finite answer to an infinite number of questions.” — Stephen Kleene

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8 years

'The fastest algorithm can frequently be replaced by one that is almost as fast and much easier to understand.' -- Douglas W. Jones

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5 years

Seven design principles from Programming Pearls by Jon Bentley: 1. Work on the right problem. 2. Explore the design space of solutions. 3. Look at the data. 4. Use the back of the envelope. 5. Build prototypes. 6. Make trade-offs when you have to. 7. Keep it simple.

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8 years

'Code is like poetry; most of it shouldn't have been written.' -- @MetaThis

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9 years

'The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise' - Edsger Dijkstra

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4 years

mRNA vaccines are to traditional vaccines what JavaScript is to static HTML. Instead of delivering a virus fragment, mRNA vaccines deliver code instructing your body to make virus fragments.

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5 years

'Code is like poetry; most of it shouldn't have been written.' -- @MetaThis

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9 years

'... the best programs are the ones written when the programmer is supposed to be working on something else.' -- Melinda Varian

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2 years

'Inside every large program is a small program trying to get out.' -- Tony Hoare

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4 years

Find the average of two unsigned integers without risking overflow: (x & y) + ((x ^ y) >> 1) Rounds down in the average isn’t an integer.

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6 years

"Programs that write programs are the happiest programs in the world."

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4 years

'If you lie to the compiler, it will get its revenge.' -- Henry Spencer

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5 years

“We already store data. In a database. It works well.” Jimmy Wales in response to the suggestion that Wikipedia store data in a blockchain.

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3 years

John von Neumann invented merge sort in 1945. It requires O(n log n) comparisons.

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4 years

'So much complexity in software comes from trying to make one thing do two things.' -- Ryan Singer

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7 years

'No matter how slow you are writing clean code, you will always be slower if you make a mess.' - @UncleBobMartin

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5 years

'Code is like poetry; most of it shouldn't have been written.' -- @MetaThis

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12 years

10 papers every programmer should read (at least twice) http://t.co/qPWCMGJR

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4 years

'... the best programs are the ones written when the programmer is supposed to be working on something else.' -- Melinda Varian

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8 years

"The idea that people knew a thing or two in the '70s is strange to a lot of young programmers." -- Donald Knuth

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6 years

'The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise' - Edsger Dijkstra

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4 years

'The idea that people knew a thing or two in the '70s is strange to a lot of young programmers.' -- Donald Knuth

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8 years

'Hardware eventually fails. Software eventually works.' -- Michael Hartung

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10 years

"Hardware eventually fails. Software eventually works." -- Michael Hartung

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7 years

'The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise' - Edsger Dijkstra

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6 years

There's a new prime record. Written in hex, it's a 1 followed by over 20 million F's.

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6 years

'... the best programs are the ones written when the programmer is supposed to be working on something else.' -- Melinda Varian

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3 years

AES encrypted penguin image:

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