But the real key to the print function is somewhat subtle and it all has to do with flexibility, both for the users and the Python development team. For users, making print a function lets you use print as an expression, unlike the print statement which can only be used as a statement. » Brett Cannon | snarky.ca
Éste es un viejo acertijo lógico, atribuido a Einstein: El inglés vive en la casa roja. El sueco tiene perro. El danés toma té. El noruego vive en la primera casa. El Alemán fuma Prince. La casa verde queda inmediatamente a la izquierda de la blanca. El dueño de la casa verde toma café. La persona que fuma Pall Mall cría pájaros. El dueño de la casa amarilla fuma Dunhill. El hombre que vive en la casa del centro toma leche. El hombre que fuma Blends vive al lado del que tiene un gato. El hombre que tiene un caballo vive al lado del que fuma Dunhill. El hombre que fuma Bluemaster toma cerveza. El hombre que fuma Blends es vecino del que toma agua. El noruego vive al lado de la casa azul. Ante estas afirmaciones, la pregunta es: ¿de quién es el pez? ...
Ryan Seddon: So how does the browser actually render a website | JSConf EU 2015 » JSConf | youtube.com
La teoría del electromagnetismo viene codificada en cuatro ecuaciones, solo cuatro, las ecuaciones de Maxwell. Estas ecuaciones controlan todos los procesos electromagnéticos conocidos, todos, al menos a nivel clásico. Eso no está mal del todo porque el electromagnetismo es la piedra angular de nuestra tecnología y, de paso, de nuestra química. » cuentos-cuanticos.com
Fue a Bjarne Stroustrup a quién le leí que “un sistema grande y complejo que no ha evolucionado a partir de otro más simple que funcionaba bien, no funciona y, además, es imposible arreglarlo para que funcione” (creo que esto es del libro The Design and Evolution of C++ publicado en 1994). Tal hipótesis se comprobó empíricamente muchas veces en el siglo XX y es por eso que se cambió el foco a proyectos ágiles. ...
» Liz Fosslien and Mollie West | qz.com
In this notebook, we cover the basics of probability theory, and show how to implement the theory in Python. » Peter Norvig | nbviewer.ipython.org
Redis is advanced key-value cache and store, under BSD license. It is very fast, has many data types(String, Hash, List, Set, Sorted Set …), uses RDB or AOF persistence and replication to guarantee data security, and supplies many language client libraries. Most of all, market chooses Redis. There are many companies using Redis and it has proved its worth. Although redis is greate, it still has some disadvantages, and the biggest one is memory limitation. Redis keeps all data in memory, which limits the whole dataset size and lets us save more data impossibly. ...
We demonstrate the extraction of secret decryption keys from laptop computers, by nonintrusively measuring electromagnetic emanations for a few seconds from a distance of 50 cm. The attack can be executed using cheap and readily-available equipment: a consumer-grade radio receiver or a Software Defined Radio USB dongle. The setup is compact and can operate untethered; it can be easily concealed, e.g., inside pita bread. Common laptops, and popular implementations of RSA and ElGamal encryptions, are vulnerable to this attack, including those that implement the decryption using modern exponentiation algorithms such as sliding-window, or even its side-channel resistant variant, fixed-window (m-ary) exponentiation. We successfully extracted keys from laptops of various models running GnuPG (popular open source encryption software, implementing the OpenPGP standard), within a few seconds. The attack sends a few carefully-crafted ciphertexts, and when these are decrypted by the target computer, they trigger the occurrence of specially-structured values inside the decryption software. These special values cause observable fluctuations in the electromagnetic field surrounding the laptop, in a way that depends on the pattern of key bits (specifically, the key-bits window in the exponentiation routine). The secret key can be deduced from these fluctuations, through signal processing and cryptanalysis. ...
David D. Clark, an MIT scientist whose air of genial wisdom earned him the nickname “Albus Dumbledore,” can remember exactly when he grasped the Internet’s dark side. He was presiding over a meeting of network engineers when news broke that a dangerous computer worm — the first to spread widely — was slithering across the wires. One of the engineers, working for a leading computer company, piped up with a claim of responsibility for the security flaw that the worm was exploiting. “Damn,” he said. “I thought I had fixed that bug.” But as the attack raged in November 1988, crashing thousands of machines and causing millions of dollars in damage, it became clear that the failure went beyond a single man. The worm was using the Internet’s essential nature — fast, open and frictionless — to deliver malicious code along computer lines designed to carry harmless files or e-mails. ...