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C++ unordered_map using a custom class type as the key
...p; third == other.third);
}
};
Here is a simple hash function (adapted from the one used in the cppreference example for user-defined hash functions):
namespace std {
template <>
struct hash<Key>
{
std::size_t operator()(const Key& k) const
{
using std::size...
Why is processing a sorted array faster than processing an unsorted array?
...less.
Further reading: "Branch predictor" article on Wikipedia.
As hinted from above, the culprit is this if-statement:
if (data[c] >= 128)
sum += data[c];
Notice that the data is evenly distributed between 0 and 255. When the data is sorted, roughly the first half of the iterations will no...
std::unique_lock or std::lock_guard?
...ricted version with a limited interface.
A lock_guard always holds a lock from its construction to its destruction. A unique_lock can be created without immediately locking, can unlock at any point in its existence, and can transfer ownership of the lock from one instance to another.
So you always...
Forward declaration of a typedef in C++
... end solution is a lengthy and unreadable code (especially when types come from various namespaces) very prone to change in original type.
– Adam Badura
Nov 29 '12 at 12:08
...
How to get Vim to highlight non-ascii characters?
...
For other (from now on less unlucky) folks ending up here via a search engine and can't accomplish highlighting of non-ASCII characters, try this (put this into your .vimrc):
highlight nonascii guibg=Red ctermbg=1 term=standout
au BufR...
android asynctask sending callbacks to ui [duplicate]
...oid processFinish(Object output) {
Log.d("Response From Asynchronous task:", (String) output);
mbtnPress.setText((String) output);
}
});
asyncTask.execute(new Object[] { "Youe request to ayn...
How to initialise memory with new operator in C++?
...(int i = 0; i < 10; i++)
{
p[i] = 0;
}
Using std::memset function from <cstring>
int* p = new int[10];
std::memset(p, 0, sizeof(int) * 10);
Using std::fill_n algorithm from <algorithm>
int* p = new int[10];
std::fill_n(p, 10, 0);
Using std::vector container
std::vector<...
Ignoring accented letters in string comparison
...mpareOptions.IgnoreNonSpace);
Here's a function that strips diacritics from a string:
static string RemoveDiacritics(string text)
{
string formD = text.Normalize(NormalizationForm.FormD);
StringBuilder sb = new StringBuilder();
foreach (char ch in formD)
{
UnicodeCategory uc = Char...
How to align 3 divs (left/center/right) inside another div?
...r vertically to contain both side floats instead of taking its height only from #center and possibly allowing the sides to protrude out the bottom.
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UILabel is not auto-shrinking text to fit label size
....g my UIViewController receives an event and i change UILabels size. from bigger to smaller. The size of my UILabel gets smaller and i get the correct needed size, but the text in my UILabel stays the same, the same font size and etc. I need the font to get smaller, for the whole text to f...