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User recognition without cookies or local storage
... Geocoding
Architecture, OS Language, System Time, Screen Resolution, etc.
Network Information API
Battery Status API
The items I listed are, of course, just a few possible ways a user can be identified uniquely. There are many more.
With this set of Random Data elements to build a Data Profile ...
Dynamic type languages versus static type languages
...cation run. Likewise, static typing may seem like it's the perfect safety net, but one look at some of the more complicated generic type definitions in Java sends most developers scurrying for eye blinders. Even with type systems and productivity, there is no silver bullet.
Final note: don't worr...
Simple way to encode a string according to a password?
...y, perhaps one attached to the user account.
Symmetric key encryption
Fernet – AES CBC + HMAC, strongly recommended
The cryptography library includes the Fernet recipe, a best-practices recipe for using cryptography. Fernet is an open standard,
with ready implementations in a wide range of pr...
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.
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