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Use of Initializers vs Constructors in Java
...ariables whereas a constructor cannot
and you are correct on the first point, wrong on the second. You can, for example, do this:
class MyClass {
private final int counter;
public MyClass(final int counter) {
this.counter = counter;
}
}
Also, when a lot of code is shared be...
What is the fastest integer division supporting division by zero no matter what the result is?
...the comments I got rid of the branch on my Pentium and gcc compiler using
int f (int x, int y)
{
y += y == 0;
return x/y;
}
The compiler basically recognizes that it can use a condition flag of the test in the addition.
As per request the assembly:
.globl f
.type f, @funct...
Best way to select random rows PostgreSQL
...ns (plus additional info in the comments),
You have a numeric ID column (integer numbers) with only few (or moderately few) gaps.
Obviously no or few write operations.
Your ID column has to be indexed! A primary key serves nicely.
The query below does not need a sequential scan of the big table,...
Java: random long number in 0
Random class has a method to generate random int in a given range. For example:
16 Answers
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What is a proper naming convention for MySQL FKs?
...
In MySQL, there is no need to give a symbolic name to foreign key constraints. If a name is not given, InnoDB creates a unique name automatically.
In any case, this is the convention that I use:
fk_[referencing table name]_[referenced table name]_[referencing field name]
Example:
CREATE TABLE...
How to sort an ArrayList in Java [duplicate]
...
List<Fruit> fruits= new ArrayList<Fruit>();
Fruit fruit;
for(int i = 0; i < 100; i++)
{
fruit = new Fruit();
fruit.setname(...);
fruits.add(fruit);
}
// Sorting
Collections.sort(fruits, new Comparator<Fruit>() {
@Override
public int compare(Fruit fruit2,...
Set style for TextView programmatically
...ne programmatically, and LayoutInflater knows everything about turning XML into objects. Sadly, many such things are hidden under private APIs, and the only way of creating some objects is supplying AttributeSet to the constructor.
– Miha_x64
Apr 21 '17 at 9:47...
Populate a Razor Section From a Partial
...ds:
public static string RequireScript(this HtmlHelper html, string path, int priority = 1)
{
var requiredScripts = HttpContext.Current.Items["RequiredScripts"] as List<ResourceInclude>;
if (requiredScripts == null) HttpContext.Current.Items["RequiredScripts"] = requiredScripts = new ...
Nullable type issue with ?: Conditional Operator
...nch of times already. The compiler is telling you that it doesn't know how convert null into a DateTime.
The solution is simple:
DateTime? foo;
foo = true ? (DateTime?)null : new DateTime(0);
Note that Nullable<DateTime> can be written DateTime? which will save you a bunch of typing.
...
What's the point of having pointers in Go?
I know that pointers in Go allow mutation of a function's arguments, but wouldn't it have been simpler if they adopted just references (with appropriate const or mutable qualifiers). Now we have pointers and for some built-in types like maps and channels implicit pass by reference.
...