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Altering a column: null to not null
...esirable for several reasons, so I am looking to update all nulls to 0 and then set these columns to NOT NULL . Aside from changing nulls to 0 , data must be preserved.
...
Converting BigDecimal to Integer
...Decimal will never contain a value larger than Integer.MAX_VALUE?
If yes, then here's your code calling intValue:
Integer.valueOf(bdValue.intValue())
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How to add a downloaded .box file to Vagrant?
... point to the folder where vagrant and copy the box file to same location. Then after you may run as follows
vagrant box add my-box name-of-the-box.box
vagrant init my-box
vagrant up
Just to check status
vagrant status
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error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)' — Miss
...in a socket not being found where the my.cnf file indicates it should be. Then when you try to run the mysql command line client, it will read my.cnf to find the socket, but it will not find it since it deviates from where the server created one. So, Unless you care where the socket resides, just ...
Using C++ library in C code
...
extern "C" int foo(char *bar)
{
return realFoo(std::string(bar));
}
Then, you will call foo() from your C module, which will pass the call on to the realFoo() function which is implemented in C++.
If you need to expose a full C++ class with data members and methods, then you may need to do m...
Installing Java 7 on Ubuntu
...ave other JDK versions installed
sudo update-alternatives --config java
then select the Java 7 version.
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How do I make an HTTP request in Swift?
...LSession
Initialize a URL object and a URLSessionDataTask from URLSession. Then run the task with resume().
let url = URL(string: "http://www.stackoverflow.com")!
let task = URLSession.shared.dataTask(with: url) {(data, response, error) in
guard let data = data else { return }
print(String(...
Why is it important to override GetHashCode when Equals method is overridden?
...uals logic; the rules are:
if two things are equal (Equals(...) == true) then they must return the same value for GetHashCode()
if the GetHashCode() is equal, it is not necessary for them to be the same; this is a collision, and Equals will be called to see if it is a real equality or not.
In th...
How do I install a module globally using npm?
...mething that you want to use in your program, using
require('whatever'), then install it
locally, at the root of your
project.
If you’re installing something that you want to use in your shell, on the
command line or something, install
it globally, so that its binaries
end up in your...
Detect whether there is an Internet connection available on Android [duplicate]
...cked up many bad habits. In general I go on the principle that if it works then...well, it works and that's all I care about. The code snippet above is completely self-contained and it's easy for anybody with reasonable programming experience to work out and (most importantly) if someone were to cut...