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Java's final vs. C++'s const
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In C++ marking a member function const means it may be called on const instances. Java does not have an equivalent to this. E.g.:
class Foo {
public:
void bar();
void foo() const;
};
void test(const Foo& i) {
i.foo(); //fine
i.bar(); //error
}
Values can be ...
java.net.SocketException: Connection reset
...y ServerSocket and close its connection without sending anything is.read() calls itself recursively.It seems because of being in an infinite while loop for reading from this socket you try to read from a closed connection.
If you use something like below for read operation;
while(true)
{
Receive...
What's the best way of structuring data on firebase?
...e will probably set you in the right state of mind, so here goes:
/users/uid
/users/uid/email
/users/uid/messages
/users/uid/widgets
Now, since we're in a hierarchical structure, if I want to iterate users' email addresses, I do something like this:
// I could also use on('child_added') here to ...
iPhone app in landscape mode, 2008 systems
... UIInterfaceOrientationLandscapeRight animated:NO];
You may also have to call window makeKeyAndVisible; first.
A few links: Developing in landscape mode, iPhone SDK: How to force Landscape mode only?
@Robert: please refer to The iPhone SDK, NDA, and Stack Overflow.
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Creating an R dataframe row-by-row
...ist a single-row dataframe and advance the list index by one. Finally, do.call(rbind,) on the list.
8 Answers
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Serialize an object to string
...) is used, because you pass an instance of a derived type to a method that calls SerializeObject that is defined in the derived type's base class: http://ideone.com/1Z5J1.
Also, Ideone uses Mono to execute code; the actual Exception you would get using the Microsoft .NET runtime has a different Mes...
Why must jUnit's fixtureSetup be static?
...ods. Otherwise, on which of the test class instances should the methods be called? If it would be possible for the @BeforeClass/@AfterClass methods to reference instance variables, then only one of the @Test methods would have access to those same instance variables - the rest would have the instanc...
How to handle both a single item and an array for the same property using JSON.net
...te override or change it to return true, or else WriteJson() will never be called.)
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
List<T> list = (List<T>)value;
if (list.Count == 1)
{
value = list...
Why should Java ThreadLocal variables be static
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Either make it static or if you are trying to avoid any static fields in your class - make the class itself a singleton and then you can safely use the an instance level ThreadLocal as long as you have that singleton available globally.
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How to normalize a path in PowerShell?
...\WINDOWS\system32\fred\frog\..\frag
With an absolute base, it is safe to call the .NET API GetFullPath:
[System.IO.Path]::GetFullPath((Join-Path (Join-Path (pwd) fred\frog) '..\frag'))
Which gives you the fully qualified path and with the .. removed:
C:\WINDOWS\system32\fred\frag
It's not co...