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When should I use jQuery deferred's “then” method and when should I use the “pipe” method?
... the converse does not hold.
Example 1
The result of some operation is an array of objects:
[{value: 2}, {value: 4}, {value: 6}]
and you want to compute the minimum and maximum of the values. Lets assume we use two done callbacks:
deferred.then(function(result) {
// result = [{value: 2}, {valu...
Covariance, Invariance and Contravariance explained in plain English?
...btype of String[], or is neither a subtype of the other? (Answer: In Java, arrays are covariant)
This was still rather abstract. To make it more concrete, let's look at which operations in Java are defined in terms of the subtype relation. The simplest example is assignment. The statement
x = y;
...
Java 8: performance of Streams vs Collections
...atic final int N = 10000;
static List<Integer> sourceList = new ArrayList<>();
static {
for (int i = 0; i < N; i++) {
sourceList.add(i);
}
}
@Benchmark
public List<Double> vanilla() {
List<Double> result = new Array...
What is the most efficient/elegant way to parse a flat table into a tree?
...where each object has a children collection and store them all in an assoc array (/hashtable) where the Id is the key. And blitz through the collection once, adding the children to the relevant children fields. Simple.
But because you're being no fun by restricting use of some good OOP, I'd probabl...
Is 'switch' faster than 'if'?
...table is memory address that holds pointer to the labels in something like array structure. following example will help you understand how jump tables are laid out
00B14538 D8 09 AB 00 D8 09 AB 00 D8 09 AB 00 D8 09 AB 00 Ø.«.Ø.«.Ø.«.Ø.«.
00B14548 D8 09 AB 00 D8 09 AB 00 D8 09 AB 00 00 00...
What is the usefulness of PUT and DELETE HTTP request methods?
... and you'll find it straight away.
Building an API without the whole HTTP array of methods makes it easier to be consumed and maintained afterwards
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PHP Function Comments
...data type can be any of PHP's data types
* (int, float, bool, string, array, object, resource, mixed)
* and should contain the type primarily returned. For example, if
* a method returns an object when things work correctly but false
* when an error happens, say 'object' rather ...
How exactly does __attribute__((constructor)) work?
....
The following snippet adds new function pointers to the .ctors function array, principally the same way as __attribute__((constructor)) does (method can coexist with __attribute__((constructor))).
#define SECTION( S ) __attribute__ ((section ( S )))
void test(void) {
printf("Hello\n");
}
void...
When would anyone use a union? Is it a remnant from the C-only days?
...llocated (perhaps they are in-place constructed in a map, or members of an array).
And now, an example, with a UML class diagram:
The situation in plain English: an object of class A can have objects of any class among B1, ..., Bn, and at most one of each type, with n being a pretty big number,...
The new keyword “auto”; When should it be used to declare a variable type? [duplicate]
...ity here
for(auto it = std::begin(v); it != std::end(v); ++it)//v could be array as well
{
//..
}
But when the type is not very well-known and infrequently used , then I think auto seems to reduce readability, such as here:
//bad : auto decreases readability here
auto obj = ProcessData(s...