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Why covariance and contravariance do not support value type
...ntational forms, "boxed" and "unboxed". The compiler has to insert code to convert from one form to the other, even though this is normally invisible at a source code level. In effect, only the "boxed" form is considered by the underlying system to be a subtype of object, but the compiler automatica...
Convert JSON to Map
What is the best way to convert a JSON code as this:
17 Answers
17
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Python int to binary string?
Are there any canned Python methods to convert an Integer (or Long) into a binary string in Python?
35 Answers
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How can I map True/False to 1/0 in a Pandas DataFrame?
...
A succinct way to convert a single column of boolean values to a column of integers 1 or 0:
df["somecolumn"] = df["somecolumn"].astype(int)
share
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How to check if an object is nullable?
...se I got a boxed Nullable<T> but because I was writing a generic WPF converter base class and some properties are nullable, so I used Nullable.GetUnderlyingType to detect that case and Activator.CreateInstance to make a boxed nullable, (Convert.ChangeType doesn't handle nullables btw).
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Convert base class to derived class [duplicate]
Is it possible in C# to explicitly convert a base class object to one of it's derived classes? Currently thinking I have to create a constructor for my derived classes that accept a base class object as a parameter and copy over the property values. I don't really like this idea, so I'd like to avoi...
Should MySQL have its timezone set to UTC?
...column is stored as UTC but
when selecting a date MySQL will automatically convert it to the
current session timezone.
When storing a date in a timestamp, MySQL will assume that the date
is in the current session timezone and convert it to UTC for
storage.
MySQL can store partial dates in datetime ...
How do you append an int to a string in C++? [duplicate]
...irectly to it, as in
std::cout << text << i;
The C++ way of converting all kinds of objects to strings is through string streams. If you don't have one handy, just create one.
#include <sstream>
std::ostringstream oss;
oss << text << i;
std::cout << oss.str()...
Leading zeros for Int in Swift
I'd like to convert an Int in Swift to a String with leading zeros. For example consider this code:
10 Answers
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Use latest version of Internet Explorer in the webbrowser control
...ss Not found");
return;
}
string FindAppkey = Convert.ToString(Regkey.GetValue(appName));
// Check if key is already present
if (FindAppkey == "8000")
{
MessageBox.Show("Required Application Settings Present");
Regkey.Clos...