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Why is it wrong to use std::auto_ptr with standard containers?
...n for extension. Lazer said what was not said before here. I guess he came by by chance.
– Sebastian Mach
Nov 18 '11 at 16:21
...
How to calculate md5 hash of a file using javascript
... that has been dragged into your Browser:
var holder = document.getElementById('holder');
holder.ondragover = function() {
return false;
};
holder.ondragend = function() {
return false;
};
holder.ondrop = function(event) {
event.preventDefault();
var file = event.dataTransfer.files[0];
...
How to declare global variables in Android?
...this answer. I highly encourage skimming the link before continuing. Point by point:
Dianne states, "There is no reason to subclass from Application. It is no different than making a singleton..." This first claim is incorrect. There are two main reasons for this. 1) The Application class provides ...
public friend swap member function
..., which I and others mistakenly thought would be the case. If you were bit by this, read here.
In short: the member function is just noise, the specialization is ugly and incomplete, but the friend function is complete and works. And when you swap, either use boost::swap or an unqualified swap wi...
What is “callback hell” and how and why does RX solve it?
...know anything about RX in particular, but usually this problem gets solved by adding native support for asynchronous computation in the programming language. The implementations can vary and include: async, generators, coroutines, and callcc.
In Python we can implement that previous loop example w...
Overriding fields or properties in subclasses
...
Of the three solutions only Option 1 is polymorphic.
Fields by themselves cannot be overridden. Which is exactly why Option 2 returns the new keyword warning.
The solution to the warning is not to append the “new” keyword, but to implement Option 1.
If you need your field to ...
What is java interface equivalent in Ruby?
Can we expose interfaces in Ruby like we do in java and enforce the Ruby modules or classes to implement the methods defined by interface.
...
How does the extend() function work in jQuery?
...C: Foo=3 Bar=undefined Baz=undefined
R: Foo=3 Bar=1 Baz=2
A === R?: true
By this we can see that jQuery.extend():
Starts with the object provided by the first parameter.
Adds to it any property in the second parameter. If the property already exists in the first parameter, it is overwritten. The...
How do I change the background color of a plot made with ggplot2
By default, ggplot2 produces plots with a grey background. How do I change the color of the background of the plot?
3 Answ...
Change auto increment starting number?
...ment value, and the change will be applied instantly.
You can verify this by issuing a SHOW CREATE TABLE t statement. You should see:
> SHOW CREATE TABLE t \G
*************************** 1. row ***************************
Table: t
Create Table: CREATE TABLE `t` (
...
) ENGINE=InnoDB AUTO...