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Why are private fields private to the type, not the instance?
... to lower mutual dependence of different pieces of code (classes in C# and Java), not different objects in memory.
For example, if you write code in one class that uses some fields in another class, then these classes are very tightly coupled. However, if you are dealing with code in which you hav...
Intellij IDEA generate for-each/for keyboard shortcut
...s. Type one of the following and hit "tab":
iter Iteration according to Java SDK 1.5 style
inst Check object type with instanceof and downcast it
itco Iterate elements of java.util.Collection
itit Iterate elements of java.util.Iterator
itli Iterate elements of java.util.List
...
How to change a module variable from another module?
...erence to that symbol.
In other words, importing is NOT like an import in JAVA, external declaration in C/C++ or even a use clause in PERL.
Rather, the following statement in Python:
from some_other_module import a as x
is more like the following code in K&R C:
extern int a; /* import from...
TypeError: 'NoneType' object is not iterable in Python
...ier on, and pukes up a bunch of unrelated nonsense all over the carpet.
Java or C++ doesn't have these problems because such a program wouldn't be allowed to compile since you haven't defined what to do when None occurs. Python gives the programmer lots of rope to hang himself by allowing you to...
What is difference between functional and imperative programming languages?
...ct-oriented programming (OOP) languages such as C#, Visual Basic, C++, and Java were designed to primarily support imperative (procedural) programming, whereas Haskell/gofer like languages are purely functional. Can anybody elaborate on what is the difference between these two ways of programming?
...
ImageView in circular through xml
...
yes, using XML, because using java code is very expensive to the mobile. With this code it only appears a circle behind my image, not the image itself being a circle. I presume is for the border, I want the image to me rounded in a circle within this one
...
How to delete an SMS from the inbox in Android programmatically?
... When trying the delete on sms/inbox/ or sms/all/, you will probably get:
java.lang.IllegalArgumentException: Unknown URL
at com.android.providers.telephony.SmsProvider.delete(SmsProvider.java:510)
at android.content.ContentProvider$Transport.delete(ContentProvider.java:149)
at android....
What are all the uses of an underscore in Scala?
...atch { case C(vs @ _*) => vs.foreach(f(_)) }
Wildcard imports
import java.util._
Hiding imports
import java.util.{ArrayList => _, _}
Joining letters to operators
def bang_!(x: Int) = 5
Assignment operators
def foo_=(x: Int) { ... }
Placeholder syntax
List(1, 2, 3) map (_ + 2)
...
recursion versus iteration
...d the n th triangular number:
Using an iterative algorithm:
//Triangular.java
import java.util.*;
class Triangular {
public static int iterativeTriangular(int n) {
int sum = 0;
for (int i = 1; i <= n; i ++)
sum += i;
return sum;
}
public static void main(Stri...
When should null values of Boolean be used?
Java boolean allows values of true and false while Boolean allows true , false , and null . I have started to convert my boolean s to Boolean s. This can cause crashes in tests such as
...