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Java generics T vs Object
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Isolated from context - no difference. On both t and obj you can invoke only the methods of Object.
But with context - if you have a generic class:
MyClass<Foo> my = new MyClass<Foo>();
Foo foo = new Foo();
Then:
Foo ...
C++ Exceptions questions on rethrow of original exception
...Err(const MyErr& other) {
printf(" Base copy-constructor, this=%p from that=%p\n", this, &other);
}
virtual ~MyErr() {
printf(" Base destructor, this=%p\n", this);
}
};
struct MyErrDerived : public MyErr {
MyErrDerived() {
printf(" Derived default constructor, this=%p...
Chrome Extension Message passing: response not sent
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From the documentation for chrome.runtime.onMessage.addListener:
This function becomes invalid when the event listener returns, unless you return true from the event listener to indicate you wish to send a response asynch...
Download a file by jQuery.Ajax
... window.URL.revokeObjectURL(url);
}
The function base64ToBlob was taken from here and must be used in compliance with this function
function base64ToBlob(base64, mimetype, slicesize) {
if (!window.atob || !window.Uint8Array) {
// The current browser doesn't have the atob function. C...
How to handle WndProc messages in WPF?
...code included below)
// 'this' is a Window
HwndSource source = HwndSource.FromHwnd(new WindowInteropHelper(this).Handle);
source.AddHook(new HwndSourceHook(WndProc));
private static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
// do stuff
return ...
Why is the Java main method static?
...rameter. This is very, very much like what you do when you use reflection from Java - it just uses confusingly named native function calls instead.
It would be perfectly legal for you to write your own version of java.exe (the source is distributed with the JDK) and have it do something entirely d...
How to do case insensitive search in Vim
...llow you to force case-sensitivity for replacements while still benefiting from smartcase when searching.
– Anthony DiSanti
Oct 15 '12 at 23:44
23
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How can I read numeric strings in Excel cells as string (not numbers)?
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Gagravarr's warning against doing this is right! From the docs: "If what you want to do is get a String value for your numeric cell, stop!. This is not the way to do it. Instead, for fetching the string value of a numeric or boolean or date cell, use DataFormatter instead....
Clone only one branch [duplicate]
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From the announcement Git 1.7.10 (April 2012):
git clone learned --single-branch option to limit cloning to a single branch (surprise!); tags that do not point into the history of the branch are not fetched.
Git a...
Is there a version control system for database structure changes?
... relevant sections. A bit more housekeeping is in order, i.e., remove ':' from $Revision 1.1 $ to freeze them.
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