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The Rest of the Lenna Story
Home Page for Charles Rosenberg
Most cited
Posts that commenters keep linking to, ranked by how many different people have cited them in Hacker News comments. 6,985 posts.
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Coreutils Gotchas (2015)
Confusing corners of the unix utilities
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Selection bias and bombers (2008)
During WWII, statistician Abraham Wald told the RAF to add armor where it didn't seem planes needed it. But he was right.
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Why are amplitudes complex?
[By prior agreement, this post will be cross-posted on Microsoft’s Q# blog, even though it has nothing to do with the Q# programming language. It does, however, contain many examples th…
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Game Programming Patterns – Bytecode
Give behavior the flexibility of data by encoding it as instructions for a virtual machine.
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The Potomac River Midair Collision
How America’s golden age of aviation safety came to an end
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Fast Fibonacci Algorithms (2015)
Definition: The Fibonacci sequence is defined as \(F(0) = 0\), \(F(1) = 1\), and \(F(n) = F(n-1) + F(n-2)\) for \(n ≥ 2\). So the sequence (starting with \(F(0)\)) is 0, 1, 1, 2, 3, 5, 8, 13, 21, ….
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Git: fetch and merge, don’t pull
This is too long and rambling, but to steal a joke from Mark Twain Blaise Pascal I haven’t had time to make it shorter yet. There is some discussion of this post on the git mailing list , but much of it is tangential to the points I’m trying to make here.
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The Opposite of a Bloom Filter
A Bloom filter is a data structure that may report it contains an item that it does not (a false positive), but is guaranteed to report correctly if it contains the item (“no false negatives”). The opposite of a Bloom filter is a data structure that may report a false negative, but can never report a false positive…
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Understanding JavaScript function invocation and "this"
Over the years, I've seen a lot of confusion about JavaScript function invocation. In particular, a lot of people have complained that the semantics of this in function invocations is confusing. In my opinion, a lot of this confusion is cleared up by understanding the core function invocation primitive,
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Wrapper Types in Rust: Choosing Your Guarantees
This post is now a part of the official rust book In my previous post I talked a bit about why the RWlock pattern is important for accessing data, …
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Gevent For the Working Python Developer
The structure of this tutorial assumes an intermediate level knowledge of Python but not much else. No knowledge of concurrency is expected. The goal is to give you the tools you need to get going with gevent, help you tame your existing concurrency problems and start writing asynchronous applications today.
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C: The Complete Nonsense
Back in 1996, having heard horror stories about Herbert Schildt's C: The Complete Reference , I decided to check it out. I flipped the book open; I found glaring errors. I paged through it. I found more glaring errors. In short, the book had lived up to the hype; it was awful. Being a pedantic sort, and having just…
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Generating code from natural language is closer than you think
Articles by Stephen Wolfram covering artificial intelligence, computational science and computational thinking, data science, education, future and historical perspectives, sciences, software design, technology, Wolfram products, more.
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The problems with url shorteners
URL shortening services have been around for a number of years . Their original purpose was to prevent cumbersome URLs from getting fragmented by broken email clients that felt the need to wrap everything to an 80 column screen. Addendum: They're useful in print , too. But it's 2009 now, and this problem no longer…
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Charlie Stross on Common Misconceptions About Publishing: Ebooks
Back to: We appear to have a hung parliament | Forward to: PDF: Satanic horror from the abyss, or merely evil?
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