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iPhone OS: How do I create an NSDate for a specific date?
...is basic stuff.
Anyway, here's the helper class I used in my project, to convert a string into an NSDate value :
@implementation DateHelper
+(NSDate*)parseDateString:(NSString *)dateString
{
NSDateFormatter *rfc3339TimestampFormatterWithTimeZone = [[NSDateFormatter alloc] init];
[rfc3339...
Interview questions: WPF Developer [closed]
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I'd put binding and converters at entry level, since that is how you spend a lot of time in WPF.
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Connecting overloaded signals and slots in Qt 5
...m having trouble getting to grips with the new signal/slot syntax (using pointer to member function) in Qt 5, as described in New Signal Slot Syntax . I tried changing this:
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How do I remove  from the beginning of a file?
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Open your file in Notepad++. From the Encoding menu, select Convert to UTF-8 without BOM, save the file, replace the old file with this new file. And it will work, damn sure.
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Hidden features of C
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Function pointers. You can use a table of function pointers to implement, e.g., fast indirect-threaded code interpreters (FORTH) or byte-code dispatchers, or to simulate OO-like virtual methods.
Then there are hidden gems in the stand...
Non-static variable cannot be referenced from a static context
...ecific instance. For methods, this usually are global helper methods (like Integer.parseInt()). For fields, it's usually constants (like car types, i.e. something where you have a limited set which doesn't change often).
To solve your problem, you need to instantiate an instance (create an object) ...
How can I check if a string is null or empty in PowerShell?
... null strings passed to a commandlet or function don't stay null. They get converted to empty strings. See the Microsoft Connect bug at connect.microsoft.com/PowerShell/feedback/details/861093/….
– JamieSee
Dec 11 '14 at 17:59
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How can I pass a list as a command-line argument with argparse?
... 'append' setting of the action option (depending on how you want the user interface to behave).
nargs
parser.add_argument('-l','--list', nargs='+', help='<Required> Set flag', required=True)
# Use like:
# python arg.py -l 1234 2345 3456 4567
nargs='+' takes 1 or more arguments, nargs='*' ...
scipy.misc module has no attribute imread?
...mageio.core.util.Array. If you want/need a numpy.ndarray and don't want to convert it, use matplotlib.pyplot.imread, as it also returns a numpy.ndarray.
– Stefan
Jan 20 '19 at 14:55
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Structure padding and packing
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Padding aligns structure members to "natural" address boundaries - say, int members would have offsets, which are mod(4) == 0 on 32-bit platform. Padding is on by default. It inserts the following "gaps" into your first structure:
struct mystruct_A {
char a;
char gap_0[3]; /* inserted by...