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What is this weird colon-member (“ : ”) syntax in the constructor?
...mber bar to a value num.
What is the difference between Initializing and Assignment inside a constructor?
Member Initialization:
Foo(int num): bar(num) {};
Member Assignment:
Foo(int num)
{
bar = num;
}
There is a significant difference between Initializing a member using Member in...
“Unknown class in Interface Builder file” error at runtime
...ode tries to load such a class, it can't find the code associated with it, and prints the warning.
By default, Objective-C targets will have -all_load -ObjC flags set by default, which will keep all of the symbols. But I had started with a C++ target, and didn't have that. Nevertheless, I found a...
Current time in microseconds in java
...
This Answer is now outdated. The OpenJDK and Oracle implementations of Java 9 come with a new implementation of Clock that provides for capturing the current moment with a resolution finer than milliseconds. On a MacBook Pro Retina I am getting the current time in m...
What is a non-capturing group in regular expressions?
How are non-capturing groups, i.e. (?:) , used in regular expressions and what are they good for?
15 Answers
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Reading an image file into bitmap from sdcard, why am I getting a NullPointerException?
...
@ParagS.Chandakkar it may be an ImageView where you can display the decoded file.
– PinoyCoder
Oct 21 '16 at 16:12
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Postgresql aggregate array
...
What I understand you can do something like this:
SELECT p.p_name,
STRING_AGG(Grade.Mark, ',' ORDER BY Grade.Mark) As marks
FROM Student
LEFT JOIN Grade ON Grade.Student_id = Student.Id
GROUP BY Student.Name;
EDIT
I am not sure. B...
Fastest way to extract frames using ffmpeg?
...about 20 times faster. We use fast seeking to go to the desired time index and extract a frame, then call ffmpeg several times for every time index. Note that -accurate_seek is the default
, and make sure you add -ss before the input video -i option.
Note that it's better to use -filter:v -fps=fps=...
What are libtool's .la file for?
...nly file that is preserved between platforms by libtool allowing to understand what happens with:
Library dependencies
Actual file names
Library version and revision
Without depending on a specific platform implementation of libraries.
...
what is reverse() in Django
...e sure what this is but it is used together with HttpResponseRedirect. How and when is this reverse() supposed to be used?
...
Open URL in new window with JavaScript
...tton" to share the current page. I would like to take the current page URL and open it in a new window. I have the current URL part working, but can't seem to get the next part working.
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