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What are C++ functors and their uses?
...eate objects which "look like" a function:
// this is a functor
struct add_x {
add_x(int val) : x(val) {} // Constructor
int operator()(int y) const { return x + y; }
private:
int x;
};
// Now you can use it like this:
add_x add42(42); // create an instance of the functor class
int i = add...
Capture characters from standard input without waiting for enter to be pressed
... use a library for that:
conio available with Windows compilers. Use the _getch() function to give you a character without waiting for the Enter key. I'm not a frequent Windows developer, but I've seen my classmates just include <conio.h> and use it. See conio.h at Wikipedia. It lists getch(...
JNI converting jstring to char *
...ink that I found when I started with JNI
http://en.wikipedia.org/wiki/Java_Native_Interface
http://download.oracle.com/javase/1.5.0/docs/guide/jni/spec/functions.html
concerning your problem you can use this
JNIEXPORT void JNICALL Java_ClassName_MethodName(JNIEnv *env, jobject obj, jstring javaS...
What are the “standard unambiguous date” formats for string-to-date conversion in R?
...sion will depend on your locale (see the examples in ?strptime and read ?LC_TIME).
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String formatting: % vs. .format vs. string literal
...ns, so in your log.debug example, the expression "some debug info: %s"%some_infowill first evaluate to, e.g. "some debug info: roflcopters are active", then that string will be passed to log.debug().
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Utils to read resource text file to String (Java) [closed]
...urce("foo.txt");
String text = Resources.toString(url, StandardCharsets.UTF_8);
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Paging UICollectionView by cells, not screen
...nformance and set a value for pageWidth:
func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
let pageWidth = // The width your page should have (plus a possible margin)
let proportionalOffset = collectionView.contentOffset.x / pageWidth
indexOfCellBeforeDragging = Int(round(p...
How to call asynchronous method from synchronous method in C#?
... deadlock anymore.
Here is my code:
public class LogReader
{
ILogger _logger;
public LogReader(ILogger logger)
{
_logger = logger;
}
public LogEntity GetLog()
{
Task<LogEntity> task = Task.Run<LogEntity>(async () => await GetLogAsync());
...
How do I select a random value from an enumeration?
...ve an array of all values. Then select a random array item.
static Random _R = new Random ();
static T RandomEnumValue<T> ()
{
var v = Enum.GetValues (typeof (T));
return (T) v.GetValue (_R.Next(v.Length));
}
Test:
for (int i = 0; i < 10; i++) {
var value = RandomEnumValue&l...
How to send a PUT/DELETE request in jQuery?
...
/* Extend jQuery with functions for PUT and DELETE requests. */
function _ajax_request(url, data, callback, type, method) {
if (jQuery.isFunction(data)) {
callback = data;
data = {};
}
return jQuery.ajax({
type: method,
url: url,
data: data,
...