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What is a Java ClassLoader?
...rom this nice tutorial from Sun:
Motivation
Applications written in statically compiled programming languages, such as C and C++, are compiled into native, machine-specific instructions and saved as an executable file. The process of combining the code into an executable native code is called link...
What is a “surrogate pair” in Java?
...nt all of the Unicode characters in Unicode version 3.1, 32-bit values — called code points — were adopted for the UTF-32 encoding scheme.
But 16-bit values are preferred over 32-bit values for efficient memory use, so Unicode introduced a new design to allow for the continued use of 16-bit valu...
Locking a file in Python
...hat all file operations are atomic, treat
# initialization like a standard call to 'open' that happens to be atomic.
# This file opener *must* be used in a "with" block.
class AtomicOpen:
# Open the file with arguments provided by user. Then acquire
# a lock on that file object (WARNING: Adv...
Google Maps v3 - limit viewable area and zoom level
...llow displaying only some area (e.g. a country) and disallow the user to slide elsewhere. Also I want to restrict the zoom level - e.g. only between levels 6 and 9. And I want to use all the base map types.
...
Git push branch from one remote to another?
...
Just thought I should call this out: this method seems to create an actual branch on the remote called HEAD. But that can be deleted. git push rorg :HEAD
– Mark Stickley
Apr 27 '17 at 13:56
...
UISegmentedControl below UINavigationbar in iOS 7
...ew that is a subview of the navigation bar. You can find it and set it as hidden. This is what Apple does in their native calendar app, for example, as well as the store app. Remember to show it when the current view disappears. If you play a little with the Apple apps, you will see that the hairlin...
How to get the number of characters in a std::string?
...
If you're using a std::string, call length():
std::string str = "hello";
std::cout << str << ":" << str.length();
// Outputs "hello:5"
If you're using a c-string, call strlen().
const char *str = "hello";
std::cout << str <&l...
C# catch a stack overflow exception
I have a recursive call to a method that throws a stack overflow exception. The first call is surrounded by a try catch block but the exception is not caught.
...
When is del useful in python?
...can create a variable name by writing a=1, it is nice that you can theoretically undo this by deleting a.
It can make debugging easier in some cases as trying to access a deleted variable will raise an NameError.
You can delete class instance attributes
Python lets you write something like:
clas...
Catching “Maximum request length exceeded”
...o easy way to catch such exception unfortunately. What I do is either override the OnError method at the page level or the Application_Error in global.asax, then check if it was a Max Request failure and, if so, transfer to an error page.
protected override void OnError(EventArgs e) .....
private...