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What is the use of making constructor private in a class?
...lared public, others private. For reducing code size, public constructors 'call' private constructors which in turn do all the work. Your public constructors are thus called delegating constructors:
class MyClass
{
public:
MyClass() : MyClass(2010, 1, 1) { }
private:
MyClass(int theYear, int t...
What is this weird colon-member (“ : ”) syntax in the constructor?
...f initialisation matters. It's a shame it has such a stupid fake function call syntax.
– Martin Beckett
Nov 10 '09 at 23:50
16
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Swift and mutating struct
...le and immutable. If you assign a struct value to an immutable storage (we call it let or constant in Swift) the value becomes immutable mode, and you cannot change any state in the value. (including calling any mutating method)
If the value is assigned to a mutable storage (we call it var or vari...
Static Initialization Blocks
...
The non-static block:
{
// Do Something...
}
Gets called every time an instance of the class is constructed. The static block only gets called once, when the class itself is initialized, no matter how many objects of that type you create.
Example:
public class Test {
...
How can I generate an MD5 hash?
...
You need java.security.MessageDigest.
Call MessageDigest.getInstance("MD5") to get a MD5 instance of MessageDigest you can use.
The compute the hash by doing one of:
Feed the entire input as a byte[] and calculate the hash in one operation with md.digest(bytes...
How do I attach events to dynamic HTML elements with jQuery? [duplicate]
...or all a tags with 'myclass' in the body, whether already present or dynamically added later.
The body tag is used here as the example had no closer static surrounding tag, but any parent tag that exists when the .on method call occurs will work. For instance a ul tag for a list which will have dyn...
How do I get the current time only in JavaScript
...urrent time efficiently using javascript
I couldn't find a solution that did exactly what I needed. I wanted clean and tiny code so I came up with this:
(Set once in your master.js and invoke when required.)
PURE JAVASCRIPT
function timeNow(i) {
var d = new Date(),
h = (d.getHours()&...
C++ Best way to get integer division and remainder
...mbined division & mod. I compiled these with gcc -O3, I had to add the call to doNothing to stop the compiler from optimising everything out (output would be 0 for the division + mod solution).
Take it with a grain of salt:
#include <stdio.h>
#include <sys/time.h>
#include <stdl...
Correct way to close nested streams and writers in Java [duplicate]
...give the implementer a way to track things to close
// assumes this is called in order for nested closeables,
// inner-most to outer-most
protected final <T extends Closeable> T autoClose(T closeable) {
closeables_.add(0, closeable);
return closeable;
}
...
Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?
...
The reason the calls behave different is they bind to very different methods.
The == case will bind to the static reference equality operator. There are 2 independent boxed int values created hence they are not the same reference.
In t...