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What is the best way to concatenate two vectors?
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@boycy No. It is amortized constant time to push_back one element. To push back n elements is O(n)
– Konrad Lindenbach
Mar 12 '16 at 1:47
1
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MySQL “incorrect string value” error when save unicode string in Django
I got strange error message when tried to save first_name, last_name to Django's auth_user model.
9 Answers
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Qt 5.1.1: Application failed to start because platform plugin “windows” is missing
... However, setting the following environment variable worked for me: QT_QPA_PLATFORM_PLUGIN_PATH=%QTDIR%\plugins\platforms\
– arsalank2
Jun 24 '15 at 11:34
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How can I detect the touch event of an UIImageView?
...swipeRight.direction = UISwipeGestureRecognizerDirectionRight;
[imgView_ addGestureRecognizer:swipeRight];
[swipeRight release];
UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc]
initWithTarget:self action:@selecto...
How to test that no exception is thrown?
...write, will work.
Such a method call can look like this: existingUserById_ShouldReturn_UserObject. If this method fails (e.g.: an exception is thrown) then you know something went wrong and you can start digging.
By adding another test (nonExistingUserById_ShouldThrow_IllegalArgumentException) th...
Objective-C: Property / instance variable in category
...ey;
@implementation MyClass
- (NSString *)test {
NSString *result = objc_getAssociatedObject(self, &MyClassResultKey);
if (result == nil) {
// do a lot of stuff
result = ...;
objc_setAssociatedObject(self, &MyClassResultKey, result, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
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Python: Find in list
...n or generator expressions for that:
matches = [x for x in lst if fulfills_some_condition(x)]
matches = (x for x in lst if x > 6)
The latter will return a generator which you can imagine as a sort of lazy list that will only be built as soon as you iterate through it. By the way, the first one...
How to define object in array in Mongoose schema correctly with 2d geo index
...swered Oct 31 '13 at 14:53
niels_hniels_h
1,25122 gold badges1010 silver badges1010 bronze badges
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Sorting a set of values [closed]
... not surprising that set means "sorted list", and you have to say unordered_set to mean "set"…
– abarnert
Jul 3 '13 at 21:33
2
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How can I get a list of all functions stored in the database of a particular schema in PostgreSQL?
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SELECT n.nspname as "Schema", p.proname as "Name", pg_catalog.pg_get_function_result(p.oid) as "Result data type", pg_catalog.pg_get_function_arguments(p.oid) as "Argument data types", CASE WHEN p.proisagg THEN 'agg' WHEN p.proiswindow THEN 'window' WHEN p.prorettype =...