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What is an existential type?
...call our own VMHandler which has a universally typed handle function. The net effect is the same, our code has to treat B as opaque.
void runWithAll(List<VMWrapper> vms, final String input)
{
for (VMWrapper vm : vms) {
vm.unwrap(new VMHandler() {
public <B> void handl...
How can I sort arrays and data in PHP?
...r keys ("k") and how it compares values ("nat" vs. normal). See http://php.net/manual/en/array.sorting.php for an overview and links to further details.
Multi dimensional arrays, including arrays of objects
$array = array(
array('foo' => 'bar', 'baz' => 42),
array('foo' => ..., 'b...
What is the maven-shade-plugin used for, and why would you want to relocate Java packages?
...he internals of how the library works (and that changes between versions), netty and guava are great examples.
Btw, I have no problem with actually providing several jars of elasticsearch, one with lucene not shaded, and one with Lucene shaded. Not sure how to do it with maven though. I don't want t...
Monad in plain English? (For the OOP programmer with no FP background)
...me functional programming constructs back to C# also. community.bartdesmet.net/blogs/bart/archive/2010/01/01/…
– Ron Warholic
Apr 24 '10 at 20:38
41
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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.
share
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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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