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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...
How do I set cell value to Date and apply default Excel date format?
... What is the best approach. Rely on the dataFormat short value (14) or the string value ("m/d/yy"). Which is really the constant value which describes the standard date format in Excel? DataFormat.getFormat() has both with string and with short value as parameter.
– Miklos Kriv...
Haml: Control whitespace around text
...
Once approach I've taken to this sort of thing is to use string interpolation:
I will first #{link_to 'Link somewhere'}#{', then render this half of the sentence if a condition is met' if condition}
I don't like the look of the literal string in the interpolation, but I've used ...
Why doesn't Haskell's Prelude.read return a Maybe?
...at returns Maybe. You can make one yourself:
readMaybe :: (Read a) => String -> Maybe a
readMaybe s = case reads s of
[(x, "")] -> Just x
_ -> Nothing
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How do i instantiate a JAXBElement object?
... parameters.
ObjectFactory factory = new ObjectFactory();
JAXBElement<String> createMessageDescription = factory.createMessageDescription("description");
message.setDescription(createMessageDescription);
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How can I remove a key and its value from an associative array?
...:
unset($arr["key2"]);
var_dump($arr);
// output: array(3) { ["key1"]=> string(6) "value1" ["key3"]=> string(6) "value3" ["key4"]=> string(6) "value4" }
To remove element by value:
// remove an element by value:
$arr = array_diff($arr, ["value1"]);
var_dump($arr);
// output: array(2) { ["...
Recommended way to save uploaded files in a servlet application
...class DataCollectionServlet extends Controller {
private static final String UPLOAD_LOCATION_PROPERTY_KEY="upload.location";
private String uploadsDirName;
@Override
public void init() throws ServletException {
super.init();
uploadsDirName = property(UPLOAD_LOCATION...
C# how to create a Guid value?
...
If you, like me, make the mistake of doing (new Guid().toString()) you will get 0000-00000-00000-00000. You need to do Guid.NewGuid().toString()
– Joao Carlos
Jan 3 '15 at 15:10
...
android image button
.../btnNovaCompra" android:layout_width="wrap_content"
android:text="@string/btn_novaCompra"
android:gravity="center"
android:drawableRight="@drawable/shoppingcart"
android:layout_height="wrap_content"/>
...
Try-catch speeding up my code?
... I’ve always wondered why the C# compiler generates so many extraneous locals. For example, new array initialisation expressions always generate a local, but is never necessary to generate a local. If it allows the JITter to produce measurably more performant code, perhaps the C# comp...