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Why should I declare a virtual destructor for an abstract class in C++?
...mory leak.
For example
class Interface
{
virtual void doSomething() = 0;
};
class Derived : public Interface
{
Derived();
~Derived()
{
// Do some important cleanup...
}
};
void myFunc(void)
{
Interface* p = new Derived();
// The behaviour of the next line is undefined...
What is the difference between using IDisposable vs a destructor in C#?
...
answered Dec 3 '08 at 23:09
Marc Gravell♦Marc Gravell
888k227227 gold badges23562356 silver badges27202720 bronze badges
...
is there an virtual environment for node.js?
...r easy. Just create a package.json file:
{ "name": "yourapp", "version": "0.0.1", "dependencies": {"jade": "0.4.1"}}
and then run:
npm bundle vendor
or if your npm version is >= 1.0 run:
npm install
to freeze into the vendor directory. and then use:
require.paths.unshift('./vendor');
...
Looping through localStorage in HTML5 and JavaScript
...entation-defined but constant until you add or remove keys).
for (var i = 0; i < localStorage.length; i++){
$('body').append(localStorage.getItem(localStorage.key(i)));
}
If the order matters, you could store a JSON-serialized array:
localStorage.setItem("words", JSON.stringify(["Lorem", ...
Deserialize json object into dynamic object using Json.net
...
Json.NET allows us to do this:
dynamic d = JObject.Parse("{number:1000, str:'string', array: [1,2,3,4,5,6]}");
Console.WriteLine(d.number);
Console.WriteLine(d.str);
Console.WriteLine(d.array.Count);
Output:
1000
string
6
Documentation here: LINQ to JSON with Json.NET
See also JObj...
Want to find records with no associated records in Rails
...
answered Mar 16 '11 at 0:33
UnixmonkeyUnixmonkey
17.1k66 gold badges4848 silver badges7070 bronze badges
...
How to continue a task when Fabric receives an error
...
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Oct 6 '10 at 22:14
...
What is the difference between Normalize.css and Reset CSS?
...
808
I work on normalize.css.
The main differences are:
Normalize.css preserves useful defaults r...
What does “./” (dot slash) refer to in terms of an HTML file path location?
...
10 Answers
10
Active
...
Best practices for overriding isEqual: and hash
...ery primitive you do
result = prime * result + var
For objects you use 0 for nil and otherwise their hashcode.
result = prime * result + [var hash];
For booleans you use two different values
result = prime * result + ((var)?1231:1237);
Explanation and Attribution
This is not tcurdt's ...