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Why would anyone use set instead of unordered_set?
C++0x is introducing unordered_set which is available in boost and many other places. What I understand is that unordered_set is hash table with O(1) lookup complexity. On the other hand, set is nothing but a tree with log(n) lookup complexity. Why on earth would anyone use set instead ...
How to sort Map values by key in Java?
...t(key);
// do something
}
This will iterate across the map in natural order of the keys.
Longer answer
Technically, you can use anything that implements SortedMap, but except for rare cases this amounts to TreeMap, just as using a Map implementation typically amounts to HashMap.
For case...
What is the order of precedence for CSS?
...
There are several rules ( applied in this order ) :
inline css ( html style attribute ) overrides css rules in style tag and css file
a more specific selector takes precedence over a less specific one
rules that appear later in the code override earlier rules if bo...
Define: What is a HashSet?
...lculated from the hashcode of the object. Take a look here
HashSet is an unordered collection containing unique elements. It has the standard collection operations Add, Remove, Contains, but since it uses a hash-based implementation, these operations are O(1). (As opposed to List for example, which ...
efficient way to implement paging
...1].[Name],
[t1].[Code]
FROM (
SELECT ROW_NUMBER() OVER (
ORDER BY [t0].[CodCity],
[t0].[CodCountry],
[t0].[CodRegion],
[t0].[Name],
[t0].[Code]) AS [ROW_NUMBER],
[t0].[CodCity],
[t0].[CodCountry],
[t0].[CodRegion],
...
Best way of invoking getter by reflection
...
Is there a way to invoke the methods in the order in which the fields are listed in the Java file?
– LifeAndHope
Jun 21 '15 at 19:37
...
原子vector的一种实现源码(atomic-vector) - C/C++ - 清泛网 - 专注C/C++及内核技术
...cting\n",
typeName(), this);
delete m_next.load(std::memory_order_relaxed);
}
template<typename Value>
void AtomicVector<Value>::ensureSize(size_t size) {
FTRACE(2, "{}::ensureSize({}), m_size = {}\n",
typeName(), size, m_size);
if (m_size >= size) return;
au...
Is it possible to import a whole directory in sass using @import?
...in another answer "If you import a directory, how can you determine import order? There's no way that doesn't introduce some new level of complexity."
Some would argue that organizing your files into directories can REDUCE complexity.
My organization's project is a rather complex app. There are ...
Is main() really start of a C++ program?
... don't have full control prior to main, you don't have full control on the order in which the static blocks get initialized.
After main, your code is conceptually "fully in control" of the program, in the sense that you can both specify the instructions to be performed and the order in which to per...
Explanation of JSONB introduced by PostgreSQL
...is if for legacy reasons your code consuming your json is dependent on the ordering of the json fields and they can't be reordered.
– djdrzzy
Aug 15 '16 at 20:35
4
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