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Useful Uses of cat
When I write shell one-liners that transform the contents of some file, they often look something like
Christoffer Stjernlöf
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Visit two-wrongs.com → RSS feedOn Hacker News Jun 2015 – Jul 2024
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2
Typing fast is about latency, not throughput
any speed above, say, maybe 80 wpm , isn’t going to hinder anyone when trying to put anything into the computer
3
Buying into the Emacs Platform (2018)
There are few pieces of software as widely misunderstood as Emacs. Emacs is frequently advertised and discussed as a text editor, but please be clear on this: Emacs is not just a text editor .
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Code reviews do find bugs
There’s some 2015 research out of Microsoft titled Code Reviews Do Not Find Bugs 1 1 Code Reviews Do Not Find Bugs; How the Current Code Review Best Practice Slows Us Down ; Czerwonka, Greiler, Tilford; IEEE International Conference on Software Engineering; 2015. which seems strangely named because reviewers do find…
5
The unreasonable effectiveness of conditional probabilities
I have been steeping myself in probabilistic exercises recently, because it’s an area where I feel like I could benefit from building better intuition. I have found a recurring key to solving many of them: conditioning on an intermediary state, and then computing the value of that intermediary state separately. This…
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Technical Writing: Learning from Kernighan
I have in front of me two books that immediately struck me with their similarity: The c Programming Language 1 1 The c Programming Language ; Kernighan & Ritchie; Prentice Hall; 1988. and The awk Programming Language 2 2 The awk Programming Language ; Aho, Kernighan & Weinberger; Addison-Wesley; 1988. Available…
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The Awk state machine parser pattern (2018)
I run the Ganglia Monitoring System on the home lan to keep an eye on temperatures, loads, disk usages, network throughput and such on the gateway and, more recently, my desktop workstation as well 1 1 The primary reason is that I have noticed some instability, and I would like to know if it’s related to temperature…
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Why Perl?
I sometimes get asked why I use Perl so much. Am I not a fan of strongly typed functional programming? Yeah, I am. Ask me to write something that is known, for sure , to become a big system and I’ll pick strongly typed functional programming without hesitation. 1 1 And, of course, put me in a team that uses Blub, and…
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Types as Interfaces
For the past few days, I have been toying with an idea for a board game. To test it out, I wanted to write a simple implementation of it. Here’s an example of a type we might need in a critical phase of the game.
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The Bug in the Physical Building
I heard a story on the way to work this morning. This story starts out like many stories about software projects start out: with a weird specification.
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Why Perl?
I sometimes get asked why I use Perl so much. Am I not a fan of strongly typed functional programming? Yeah, I am. Ask me to write something that is known, for sure , to become a big system and I’ll pick strongly typed functional programming without hesitation. 1 1 And, of course, put me in a team that uses Blub, and…
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.NET on Linux: What a Contrast
Almost five years ago I wrote a brief history about .net on non-Windows platforms . I stumbled over that article now and it resurfaced traumatic memories of navigating .net development on Linux and MacOS.
13
SI Units for Request Rate
Request rate is the number of requests that arrive, or are serviced, or leave, during some period.
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How Laziness Works
So yesterday I saw someone ask about how many times the variable m gets evaluated in the following Haskell snippet:
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On Competing with C Using Haskell (2017)
Mark Karpov wrote in his article on Migrating text metrics to pure Haskell how he originally did foreign calls out to C for many of the functions in his text metric package, but now ported them to Haskell when he learned that Haskell can give you performance comparable to C.