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Store images in a MongoDB database
...
You can try this one:
String newFileName = "my-image";
File imageFile = new File("/users/victor/images/image.png");
GridFS gfsPhoto = new GridFS(db, "photo");
GridFSInputFile gfsFile = gfsPhoto.createFile(imageFile);
gfsFile.setFilename(newFileNam...
Is it unnecessary to put super() in constructor?
... public Derived(int i) { } }
Also fine.
public class Base { public Base(String s) { } }
public class Derived extends Base { }
The above is a compilation error as Base has no default constructor.
public class Base { private Base() { } }
public class Derived extends Base { }
This is also an er...
Is there a pattern for initializing objects created via a DI container
....
Thus, the interface should simply be:
public interface IMyIntf
{
string RunTimeParam { get; }
}
Now define the Abstract Factory:
public interface IMyIntfFactory
{
IMyIntf Create(string runTimeParam);
}
You can now create a concrete implementation of IMyIntfFactory that creates con...
Compiler Ambiguous invocation error - anonymous method and method group with Func or Action
...ion of your program:
class Program
{
delegate void D1();
delegate string D2();
static string X() { return null; }
static void Y(D1 d1) {}
static void Y(D2 d2) {}
static void Main()
{
Y(X);
}
}
So let's go through it line by line.
An implicit conversion ...
How to accept Date params in a GET request to Spring MVC Controller?
...apping(value="/fetch" , method=RequestMethod.GET)
public @ResponseBody String fetchResult(@RequestParam("from") @DateTimeFormat(pattern="yyyy-MM-dd") Date fromDate) {
//Content goes here
}
Yes, it's simple. Just add the DateTimeFormat annotation.
...
Can an Option in a Select tag carry multiple values?
... (3 years after answering) to put both values into JSON format (using JSON.stringify()) because of a complaint that my proof-of-concept answer "could confuse a newbie developer."
share
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improve thi...
Appending an element to the end of a list in Scala
...e element is appended, and the ListBuffer converted back (pretty much like String and StringBuilder in Java), but that's just a guess.
– Landei
Aug 9 '13 at 9:27
...
How to set background color of an Activity to white programmatically?
...t to use one of your own custom colours, you can add your custom colour to strings.xml and then use the below to call it.
element.setBackgroundColor(R.color.mycolour);
However if you want to set the colour in your layout.xml you can modify and add the below to any element that accepts it.
androi...
What's the difference between the 'ref' and 'out' keywords?
...e confusing part, reference types:
Lets create a reference type:
List<string> someobject = new List<string>()
When you new up someobject, two parts are created:
The block of memory that holds data for someobject.
A reference (pointer) to that block
of data.
Now when you send in ...
Truncate a list to a given number of elements
...rt static java.lang.Math.min;
public class T {
public static void main( String args[] ) {
List<String> items = Arrays.asList("1");
List<String> subItems = items.subList(0, min(items.size(), 2));
// Output: [1]
System.out.println( subItems );
items = Arrays.asList...