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Why does GCC generate such radically different assembly for nearly the same C code?
...eate more code to save branching in that case or looping, etc and have the net result be faster code.
The bottom line is you fed a compiler different source and expected the same results. The problem is not the compiler output but the expectations of the user. It is fairly easy to demonstrate for...
What Every Programmer Should Know About Memory?
...le core can use. Well possibly you can imagine a situation where there's a net benefit to running multiple memory-hungry threads on the same NUMA node for low-latency inter-thread communication, but having them use remote memory for high bandwidth not-latency-sensitive stuff. But this is pretty obsc...
Fastest way to determine if an integer's square root is an integer
...sa,
the conversion from long to double includes rounding for big values. Nonetheless, the test is correct (unless the proof is wrong).
Trying to incorporate the mod255 idea wasn't successful.
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What kinds of patterns could I enforce on the code to make it easier to translate to another program
...e.)
What you have to shoot for to translate large-scale systems is high nineties percentage conversion rates, or it is likely that you can't complete the manual part of the translation activity.
Another key consideration is size of code to be translated. It takes a lot of energy to build a worki...
Regular expression to match numbers with or without commas and decimals in text
...nd the number 22. If you're using something with lookbehind support (like .NET), this is pretty easy: replace ^ with (?<!\S) and $ with (?!\S) and you're good to go:
(?<!\S)(\d*\.?\d+|\d{1,3}(,\d{3})*(\.\d+)?)(?!\S)
If you're working with JavaScript or Ruby or something, things start looking...
Is Java really slow?
...
Applets take forever to load, because of transmitting a full JAR over the network and loading the VM to boot.
Synchronization used to carry a heavy performance penalty (this has been optimized with each Java version). Reflection is still costly, though.
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Why doesn't Java offer operator overloading?
...am << "Hello " << 25 << " World" ;
networkStream << "Hello " << 25 << " World" ;
anythingThatOverloadsShiftOperator << "Hello " << 25 << " World" ;
// Java concatenation
myStringBuffer.append("Hello ").append(25).append(" ...
DDD - the rule that Entities can't access Repositories directly
... his book. After you have tired from end-lessly rummaging through the internet, fork over the well deserved money and read the book.)
I then had some discussion with the always gracious Marco Pivetta @Ocramius who showed me a bit of code on pulling out a specification from the domain and using that...
How do I clone a subdirectory only of a Git repository?
...plicitly says so.) Cloning only a subdirectory is not possible in Git. The network protocol doesn't support it, the storage format doesn't support it. Every single answer to this question always clones the whole repository. The question is a simple Yes/No question, and the answer is two characters: ...
What's the difference between a continuation and a callback?
...e is a call/cc implementation in JavaScript done by Matt Might (matt.might.net/articles/by-example-continuation-passing-style - go to the very last paragraph), but please don't ask me how it works nor how to use it :-)
– Marco Faustinelli
Dec 30 '15 at 16:28
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