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How do I get an empty array of any size in python?
...tiguous array to fill with integers, consider bytearray and memoryivew:
# cast() is available starting Python 3.3
size = 10**6
ints = memoryview(bytearray(size)).cast('i')
ints.contiguous, ints.itemsize, ints.shape
# (True, 4, (250000,))
ints[0]
# 0
ints[0] = 16
ints[0]
# 16
...
How to set thousands separator in Java?
...println(formatter.format(bd.longValue()));
According to the JavaDoc, the cast in the first line should be save for most locales.
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What is the difference between the HashMap and Map objects in Java?
...s using the "Map" interface restricts you to only those methods unless you cast the collection back from Map to HashMap (which COMPLETELY defeats the purpose).
Often what you will do is create an object and fill it in using it's specific type (HashMap), in some kind of "create" or "initialize" meth...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
... uint64_t* buffer = new uint64_t[size/8];
char* charbuffer=reinterpret_cast<char*>(buffer);
for (unsigned i=0;i<size;++i) charbuffer[i]=rand()%256;
uint64_t count,duration;
chrono::time_point<chrono::system_clock> startP,endP;
{
uint64_t c0 = 0;
uint64_t c...
Converting 'ArrayList to 'String[]' in Java
...ourse, because Java doesn't do real generics; it mostly just fakes them by casting Object)
– Nyerguds
May 19 '16 at 11:05
3
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When do I use fabs and when is it sufficient to use std::abs?
...preal there are cases with hard "ambiguous overload" messages - abs(static_cast<T>(x)) isn't always solving that.
When abs is ambiguous, there are chances that fabs is working as expected. For sqrt I found no such simple escape.
Since weeks I'm hard struggling on C++ "not existing problems". ...
Get PHP class property by string
...t actually succeed, although this is likely to be a bug. $name is silently cast to an integer. In the case of a non-numeric string this is 0. Then this string index of the value of $property is used as the property name. If $property holds the value "abc", then this will refer to the property $this-...
What is the best way to prevent session hijacking?
... when a user visits one of your "sensitive" areas, redirect them to HTTPS, and check for the presence of that secure cookie. A real user will have it, a session hijacker will not.
EDIT: This answer was originally written in 2008. It's 2016 now, and there's no reason not to have SSL across your enti...
json_decode to array
...
This is a late contribution, but there is a valid case for casting json_decode with (array).
Consider the following:
$jsondata = '';
$arr = json_decode($jsondata, true);
foreach ($arr as $k=>$v){
echo $v; // etc.
}
If $jsondata is ever returned as an empty string (as in my ...
Getting mouse position in c#
...g System.Windows; // Or use whatever point class you like for the implicit cast operator
/// <summary>
/// Struct representing a point.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct POINT
{
public int X;
public int Y;
public static implicit operator Poi...