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What is the difference between '/' and '//' when used for division?
Is there a benefit to using one over the other? In Python 2, they both seem to return the same results:
13 Answers
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Understanding dict.copy() - shallow or deep?
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It's not a matter of deep copy or shallow copy, none of what you're doing is deep copy.
Here:
>>> new = original
you're creating a new reference to the the list/dict referenced by original.
while here:
>>> new = original.copy()
>>> # or
>...
What is the use of printStackTrace() method in Java?
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This is normal, with the 1st one you call the toString() of the error, and in the 2nd you ask to print all the stackTrace from the error. That's 2 différents things.
– Jon
May 17 '16 at 8:08
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jQuery select all except first
...all those solutions: jsperf.com/fastest-way-to-select-all-expect-the-first-one Depending on the number of items, $("li").not(":eq(0)") seems good.
– Damien
Dec 19 '12 at 15:41
4
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WITH (NOLOCK) vs SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
Could someone give me some guidance on when I should use WITH (NOLOCK) as opposed to SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
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Prevent multiple instances of a given app in .NET?
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Use Mutex. One of the examples above using GetProcessByName has many caveats. Here is a good article on the subject:
http://odetocode.com/Blogs/scott/archive/2004/08/20/401.aspx
[STAThread]
static void Main()
{
using(Mutex mutex =...
Dependency Injection vs Factory Pattern
...ction is more of a architectural pattern for loosely coupling software components. Factory pattern is just one way to separate the responsibility of creating objects of other classes to another entity. Factory pattern can be called as a tool to implement DI. Dependency injection can be implemented i...
Token Authentication for RESTful API: should the token be periodically changed?
... framework login view, so that the token is refreshed whenever a login is done:
class ObtainExpiringAuthToken(ObtainAuthToken):
def post(self, request):
serializer = self.serializer_class(data=request.data)
if serializer.is_valid():
token, created = Token.objects.ge...
Java dynamic array sizes?
...ocate it needs to grow in size. When it does you'll have to allocate a new one and copy the data from the old to the new:
int[] oldItems = new int[10];
for (int i = 0; i < 10; i++) {
oldItems[i] = i + 10;
}
int[] newItems = new int[20];
System.arraycopy(oldItems, 0, newItems, 0, 10);
oldItem...
What is time_t ultimately a typedef to?
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@Viet also possible with an one-liner without creating a file: stackoverflow.com/a/36096104/895245
– Ciro Santilli 郝海东冠状病六四事件法轮功
Mar 18 '16 at 23:48
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