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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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Convert light frequency to RGB?
...
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;
/**...
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...
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 ...
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 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 = () =...
Initialising mock objects - MockIto
...e MockitoAnnotations.initMocks are strictly equivalent solutions. From the javadoc of the MockitoJUnitRunner :
JUnit 4.5 runner initializes mocks annotated with Mock, so that explicit usage of MockitoAnnotations.initMocks(Object) is not necessary. Mocks are initialized before each test method.
Th...
What new capabilities do user-defined literals add to C++?
...e all structs derive from Object. This decision alone puts .NET far beyond Java's reach when working with primitives, no matter how much boxing/unboxing hacks Java will add to its specification.
Do YOU really need it in C++?
This question is for YOU to answer. Not Bjarne Stroustrup. Not Herb Sutter....