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What are 'closures' in .NET?
...ple, take this C# code:
delegate int testDel();
static void Main(string[] args)
{
int foo = 4;
testDel myClosure = delegate()
{
return foo;
};
int bar = myClosure();
}
At the end of it, bar will be set to 4, and the myClosure d...
How do I use reflection to invoke a private method?
...atic class AccessExtensions
{
public static object call(this object o, string methodName, params object[] args)
{
var mi = o.GetType ().GetMethod (methodName, System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance );
if (mi != null) {
r...
Simple Log to File example for django 1.3+
...read-1 ] [INFO ] [djangoproject.logger] This is a manually logged INFO string.
2016-04-05 22:12:32,984 [Thread-1 ] [DEBUG] [djangoproject.logger] This is a manually logged DEBUG string.
2016-04-05 22:12:32,984 [Thread-1 ] [ERROR] [django.request ] Internal Server Error: /
Traceback ...
Caching a jquery ajax response in javascript/browser
...ier for the cache. Maybe have a better, safer ID (it depends on the object string representation here) ?
// on $.ajax call we could also set an ID in originalOptions
var id = originalOptions.url+ JSON.stringify(originalOptions.data);
options.cache = false;
options.bef...
Calling Objective-C method from C++ member function?
... case for xcode project I open xcode project file throught TextEdit, found string which contents interest file, it should be like:
/* OnlineManager.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = OnlineManager.cpp; sourceTree = "<group>"; };
...
How to cast List to List
...'s a more versatile solution:
List<Object> objects = Arrays.asList("String1", "String2");
List<String> strings = objects.stream()
.map(element->(String) element)
.collect(Collectors.toList());
There's a ton of benefits, but one is that...
When exactly are onSaveInstanceState() and onRestoreInstanceState() called?
...
String activityState;
@Override
public void onCreate(Bundle savedInstanceState) {
// call the super class onCreate to complete the creation of activity like
// the view hierarchy
super.onCreate(savedInstanceState);
// rec...
How to write logs in text file when using java.util.logging.Logger
...
Try this sample. It works for me.
public static void main(String[] args) {
Logger logger = Logger.getLogger("MyLog");
FileHandler fh;
try {
// This block configure the logger with handler and formatter
fh = new FileHandler("C:/temp/test/MyLog...
What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
...
The single * means that there can be any number of extra positional arguments. foo() can be invoked like foo(1,2,3,4,5). In the body of foo() param2 is a sequence containing 2-5.
The double ** means there can be any number of extra named parameters. bar() can be invoked like...
Disable cache for some images
...ls like a hack but is fairly portable is to add a randomly generated query string to each request for the dynamic image.
So, for example -
<img src="image.png" />
Would become
<img src="image.png?dummy=8484744" />
Or
<img src="image.png?dummy=371662" />
From the point of ...