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Polymorphism vs Overriding vs Overloading
...is not definable for Humans. It is only definable for the subclasses Male and Female. Also, Human is an abstract concept — You cannot create a human that is neither Male nor Female. It’s got to be one or the other.
So we defer the implementation by using the abstract class.
public class Mal...
JavaScript inheritance: Object.create vs new
...like
function SomeBaseClass(){
this.publicProperty='SomeValue';
}
and if you use it like
var obj=new MyClass();
console.log(obj.publicProperty); // undefined
console.log(obj);
The obj object won't have publicProperty property like in this example.
Your second example
MyClass.prot...
std::unique_ptr with an incomplete type won't compile
...l is complete
};
because otherwise the compiler generates a default one, and it needs a complete declaration of foo::impl for this.
If you have template constructors, then you're screwed, even if you don't construct the impl_ member:
template <typename T>
foo::foo(T bar)
{
// Here the...
httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for Se
I tried to restart my Apache server on CentOS 5.0 and got this message:
11 Answers
11
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Call an activity method from a fragment
...n my activity from a fragment. I want the fragment to give the method data and to get the data when the method return. I want to achieve similar to call on a static method, but without the use of static because it create problems in the activity.
...
How to install the Raspberry Pi cross compiler on my Linux host machine?
... a folder in your home directory called raspberrypi.
Go in to this folder and pull down the ENTIRE tools folder you mentioned above:
git clone git://github.com/raspberrypi/tools.git
You wanted to use the following of the 3 ones, gcc-linaro-arm-linux-gnueabihf-raspbian, if I did not read wrong.
...
How to create materialized views in SQL Server?
I am going to design a DW and I heard about materialized views. Actually I want to create a view and it should update automatically when base tables are changed. Can anyone explain with an query example..
...
WWW or not WWW, what to choose as primary site name? [closed]
From technical perspective the only issue is traffic and incoming links (one of them should redirect to another).
14 Answe...
S3 - Access-Control-Allow-Origin Header
...fault values. That's all I needed to solve your problem. Just click "Save" and try again to see if it worked. If it doesn't, you could also try the code below (from alxrb answer) which seems to have worked for most of the people.
<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xm...
isset() and empty() - what to use
...er something is set or not use isset.
Empty checks if the variable is set and if it is it checks it for null, "", 0, etc
Isset just checks if is it set, it could be anything not null
With empty, the following things are considered empty:
"" (an empty string)
0 (0 as an integer)
0.0 (0 as a floa...