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How does `is_base_of` work?
...ce because whether we can convert from a D* to a B* isn't dependent on the form of inheritance according to 4.10/3
If they are not related
Now let's assume they are not related by inheritance. Thus for the first function we have the following candidates
D* (Host<B, D>&)
And for the s...
Why shouldn't all functions be async by default?
...erations are not high latency, so it doesn't make any sense to take the performance hit that mitigates that latency. Rather, a key few of your operations are high latency, and those operations are causing the zombie infestation of async throughout the code.
if performance is the sole problem, s...
What is the difference between concurrency and parallelism?
...t exists when at least two threads are making progress. A more generalized form of parallelism that can include time-slicing as a form of virtual parallelism.
Parallelism: A condition that arises when at least two threads are executing simultaneously.
...
All falsey values in JavaScript
...ues in JavaScript
false
Zero of Number type: 0 and also -0, 0.0, and hex form 0x0 (thanks RBT)
Zero of BigInt type: 0n and -0n (new in 2020, thanks GetMeARemoteJob)
"", '' and `` - strings of length 0
null
undefined
NaN
document.all (in HTML browsers only)
This is a weird one. document.all is a...
fastest MD5 Implementation in JavaScript
...e writing his implementation. It's a good read for anyone interested in performant javascript.
http://www.webreference.com/programming/javascript/jkm3/
His MD5 implementation can be found here
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Using Kafka as a (CQRS) Eventstore. Good idea?
...nsumption, after which it
will be discarded to free up space. Kafka's performance is effectively
constant with respect to data size so retaining lots of data is not a
problem.
So while messages can potentially be retained indefinitely, the expectation is that they will be deleted. This doesn...
What is the difference between UTF-8 and Unicode?
...(7 bits). With 26 letters in the alphabet, both in capital and non-capital form, numbers and punctuation signs, that worked pretty well. ASCII got extended by an 8th bit for other, non-English languages, but the additional 128 numbers/code points made available by this expansion would be mapped to d...
What is the >>>= operator in C?
...the equivalent of:
int i = 10;
while( i >>= 1)
which is simply performing (integer) division by 2 in each iteration, producing the sequence 5, 2, 1.
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How do I iterate over an NSArray?
...t
}
This construct is used to enumerate objects in a collection which conforms to the NSFastEnumeration protocol. This approach has a speed advantage because it stores pointers to several objects (obtained via a single method call) in a buffer and iterates through them by advancing through the buf...
Numpy first occurrence of value greater than existing value
... above comment, this answer is off by one if N/2 is not in aa. The correct form would be np.searchsorted(aa, N/2, side='right') (without the +1). Both forms give the same index otherwise. Consider the test case of N being odd (and N/2.0 to force float if using python 2).
– aske...