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Why does calling a method in my derived class call the base class method?
...ype polymorphism in C# uses explicit virtuality, similar to C++ but unlike Java. This means that you explicitly have to mark methods as overridable (i.e. virtual). In C# you also have to explicitly mark overriding methods as overriding (i.e. override) to prevent typos.
public class Person
{
pub...
How to store date/time and timestamps in UTC time zone with JPA and Hibernate
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To the best of my knowledge, you need to put your entire Java app in UTC timezone (so that Hibernate will store dates in UTC), and you'll need to convert to whatever timezone desired when you display stuff (at least we do it this way).
At startup, we do:
TimeZone.setDefault(TimeZ...
Convert light frequency to RGB?
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For lazy guys (like me), here is an implementation in java of the code found in @user151323 's answer (that is, just a simple translation from pascal code found in Spectra Lab Report):
static private final double Gamma = 0.80;
static private final double IntensityMax = 255;
/**...
Best way to merge two maps and sum the values of same key?
...ption for five years when I finally found Scala. The difference between a Java object reference that might be null and one that cannot be (i.e. between A and Option[A]) is so huge, I couldn't believe they were really the same type. I just started looking at Scalaz. I'm not sure I'm smart enough.....
What is the 'cls' variable used for in Python classes?
... class...it is the same concept as static member and non-static members in java if you are from java background.
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Using the “animated circle” in an ImageView while loading stuff
...centerVertical="true" />
</RelativeLayout>
And in MainActivity.java:
package com.fcchyd.linkletandroid;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import java.u...
Is 1.0 a valid output from std::generate_canonical?
...iKaronen: For sufficiently small angles, sin(x) is simply x. My squawk at Java's sine function relates to is with angles that are near multiples of pi. I would posit that 99% of the time, when code asks for sin(x), what it really wants is the sine of (π/Math.PI) times x. The people maintaining Jav...
Finding which process was killed by Linux OOM killer
...killed by oom mechanism
dstat --top-oom
--out-of-memory---
kill score
java 77
java 77
java 77
and as per man page
--top-oom
show process that will be killed by OOM the first
...
How do you change text to bold in Android?
...lic
You can only use specific fonts sans, serif & monospace via xml, Java code can use custom fonts
android:typeface="monospace" // or sans or serif
Programmatically (Java code)
TextView textView = (TextView) findViewById(R.id.TextView1);
textView.setTypeface(Typeface.SANS_SERIF); //only ...
How do I manage MongoDB connections in a Node.js web application?
...ch is NOT the place for a database connection object. (Given the nature of JavaScript I would consider it highly dangerous to mix in anything to an object constructed by library code). So with that you only need to Consider a module that exports two methods. connect = () => Promise and get = () =...