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What is the difference between self-types and trait subclasses?
...is extended, then you're required to mix-in an A.
When a concrete class finally extends/mixes-in these traits, some class/trait must implement A.
Consider the following examples:
scala> trait User { def name: String }
defined trait User
scala> trait Tweeter {
| user: User =>
...
How can I implement an Access Control List in my Web MVC application?
...ion, the best way to approach this would be to use decorator pattern, Basically, this means that you take your object, and place it inside another object, which will act like a protective shell. This would NOT require you to extend the original class. Here is an example:
class SecureContainer
{
...
Can I use jQuery with Node.js?
...
Note: The original answer fails to mention that it you will need to install jsdom as well using npm install jsdom
Update (late 2013): The official jQuery team finally took over the management of the jquery package on npm:
npm install jquery
Then:
require("jsdom").env("", function (err, wind...
Why should hash functions use a prime number modulus?
...
Usually a simple hash function works by taking the "component parts" of the input (characters in the case of a string), and multiplying them by the powers of some constant, and adding them together in some integer type. So for e...
get size of json object
... check the size i.e. like that:
var data = {one : 1, two : 2, three : 3};
_.size(data);
//=> 3
_.keys(data);
//=> ["one", "two", "three"]
_.keys(data).length;
//=> 3
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Difference between == and ===
... You can also override isEqual: in Swift: override func isEqual(_ object: Any?) -> Bool {}
– Thomas Elliot
Sep 16 '17 at 1:33
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VB.NET equivalent to C# var keyword [duplicate]
...ype '<variablename>' is not defined." - and VarType(variable) is actually just the VB version of variable.GetType() which returns the type of the instance stored in the variable at runtime) I used:
Function MyVarType(Of T)(ByRef Var As T) As Type
Return GetType(T)
End Function
In detail...
How to display request headers with command line curl
...
@SergeyVlasov Actually, the equivalent of /dev/null in Windows is nul, not null.
– Francisco Zarabozo
Dec 11 '17 at 7:37
3
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How to get root access on Android emulator?
I have All Android SDK versions(from 1.5 to 2.3.3), and I tried many methods for getting root in Android emulator. I don't use any Android device and test everything on emulator(AVD).
...
Maven2: Best practice for Enterprise Project (EAR file)
...ur two dependencies for your EJB project and your WAR project.
So you actually have three maven projects here. One EJB. One WAR. One EAR that pulls the two parts together and creates the ear.
Deployment descriptors can be generated by maven, or placed inside the resources directory in the EAR pr...