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How do you find the sum of all the numbers in an array in Java?
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In java-8 you can use streams:
int[] a = {10,20,30,40,50};
int sum = IntStream.of(a).sum();
System.out.println("The sum is " + sum);
Output:
The sum is 150.
It's in the package java.util.stream
import java.util.stream.*;
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How to convert a table to a data frame
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324
I figured it out already:
as.data.frame.matrix(mytable)
does what I need -- apparently, th...
Create a GUID in Java
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355
Have a look at the UUID class bundled with Java 5 and later.
For example:
If you want a ra...
MySQL ON DUPLICATE KEY UPDATE for multiple rows insert in single query
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3 Answers
3
Active
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Mocking objects with Moq when constructor has parameters
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34
The last line is giving you a real instance because you are using the new keyword, not mocking ...
Modular multiplicative inverse function in Python
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131
Maybe someone will find this useful (from wikibooks):
def egcd(a, b):
if a == 0:
r...
Else clause on Python while statement
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396
The else clause is only executed when your while condition becomes false. If you break out of...
What is the relationship between the docker host OS and the container base image OS?
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3 Answers
3
Active
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Can't use modulus on doubles?
...he fmod() function.
#include <cmath>
int main()
{
double x = 6.3;
double y = 2.0;
double z = std::fmod(x,y);
}
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