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Mutable vs immutable objects
...tring> map = ...
Person p = new Person();
map.put(p, "Hey, there!");
p.setName("Daniel");
map.get(p); // => null
The Person instance gets "lost" in the map when used as a key because its hashCode and equality were based upon mutable values. Those values changed outside the map and al...
Please enter a commit message to explain why this merge is necessary, especially if it merges an upd
...should it? the question is tagged osx, and this answer concerns how Ubuntu sets up an entirely different setup for Git (using nano or pico), which is not applicable to the OS X setup. It is in no way generalizable and also doesn't provide insight into how it works, hence the comment left by @AdrianC...
How to try convert a string to a Guid [duplicate]
...01A698857709")
instead of "9D2B0228-4D0D-4C23-8B49-01A698857709" you can set your string value
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How do I associate a Vagrant project directory with an existing VirtualBox VM?
...t is the name of the default virtual machine (if you're not using multi-VM setups).
If your VM has somehow become disassociated, what you can do is do VBoxManage list vms which will list every VM that VirtualBox knows about by its name and UUID. Then manually create a .vagrant file in the same dir...
How to automatically generate a stacktrace when my program crashes
...main+0xdb)[0x3a9b91c4bb]
./test[0x40086a]
This shows the load module, offset, and function that each frame in the stack came from. Here you can see the signal handler on top of the stack, and the libc functions before main in addition to main, foo, bar, and baz.
...
How to change context root of a dynamic web project in Eclipse?
...teps for Eclipse Indigo.
In your project's Properties, choose Web Project Settings.
Change Context root to app.
Choose Window > Show View > Servers.
Stop the server by either clicking the red square box ("Stop the server" tooltip) or context-click on the server listing to choose "Stop".
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What's a reliable way to make an iOS app crash?
...
it depends on your build settings; also, I think the question is about testing, it seems ok to keep asserts in test builds
– djromero
Nov 22 '12 at 11:15
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Copy constructor for a class with unique_ptr
...ve:
A( A&& a ) : up_( std::move( a.up_ ) ) {}
Having a complete set of the necessary operators also leads to
A& operator=( const A& a )
{
up_.reset( new int( *a.up_ ) );
return *this,
}
A& operator=( A&& a )
{
up_ = std::move( a.up_ );
return *this,
}
I...
What's the advantage of a Java enum versus a class with public static final fields?
...zation by name not by value, which offers a degree of future-proofing.
EnumSet and EnumMap classes.
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android webview geolocation
...
JavaScript must be enabled in the WebView, using WebSettings.setJavaScriptEnabled(true);
The app needs permission ACCESS_FINE_LOCATION
The WebView must use a custom WebChromeClient which implements WebChromeClient.onGeolocationPermissionsShowPrompt(). This method
is called by...