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How can I initialize base class member variables in derived class constructor?
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You can't initialize a and b in B because they are not members of B. They are members of A, therefore only A can initialize them. You can make them public, then do assignment in B, but that is not a recommended option since it would destroy encapsu...
How to create a date and time picker in Android? [closed]
Is there any android widget that enable to pick the date and the time at the same time ?
I already use the basic time picker and date picker .
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How can I get color-int from color resource?
...name);
Check here on how to define custom colors:
http://sree.cc/google/android/defining-custom-colors-using-xml-in-android
EDIT(1):
Since getColor(int id) is deprecated now, this must be used :
ContextCompat.getColor(context, R.color.your_color);
(added in support library 23)
EDIT(2):
Belo...
https connection using CURL from command line
...for example) into DER encoded binary x.509(.cer). Do this for each cert.
Convert the certs into PEM, and concat them into 1 file.
openssl x509 -inform DES -in file1.cer -out file1.pem -text
openssl x509 -inform DES -in file2.cer -out file2.pem -text
openssl x509 -inform DES -in file3.cer -out fi...
Struct Constructor in C++?
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In C++ the only difference between a class and a struct is that members and base classes are private by default in classes, whereas they are public by default in structs.
So structs can have constructors, and the syntax is the same as for classes.
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Reset C int array to zero : the fastest way?
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memset (from <string.h>) is probably the fastest standard way, since it's usually a routine written directly in assembly and optimized by hand.
memset(myarray, 0, sizeof(myarray)); // for automatically-allocated arrays
memset(myarray, 0, N*sizeof(*myarray)); // for heap-allo...
Does Parallel.ForEach limit the number of active threads?
...uses an appropriate number of cores, based on how many you physically have and how many are already busy. It allocates work for each core and then uses a technique called work stealing to let each thread process its own queue efficiently and only need to do any expensive cross-thread access when it ...
How to make URL/Phone-clickable UILabel?
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Use UITextView instead of UILabel and it has a property to convert your text to hyperlink.
Objective-C:
yourTextView.editable = NO;
yourTextView.dataDetectorTypes = UIDataDetectorTypeAll;
Swift:
yourTextView.editable = false;
yourTextView.dataDetectorTypes = UIDataDetectorTypes...
Can I call a constructor from another constructor (do constructor chaining) in C++?
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C++11: Yes!
C++11 and onwards has this same feature (called delegating constructors).
The syntax is slightly different from C#:
class Foo {
public:
Foo(char x, int y) {}
Foo(int y) : Foo('a', y) {}
};
C++03: No
Unfortunately, there'...
Escaping ampersand in URL
... must be percent-encoded. Percent-encoding
a reserved character involves converting the character to its
corresponding byte value in ASCII and then representing that value as
a pair of hexadecimal digits. The digits, preceded by a percent sign
("%") which is used as an escape character, are ...