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How do you find the sum of all the numbers in an array in Java?
...eams:
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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I figured it out already:
as.data.frame.matrix(mytable)
does what I need -- apparently, the table needs to somehow be converted to a matrix in order to be appropriately translated into a data frame. I found more details on this as.dat...
How to select rows with one or more nulls from a pandas DataFrame without listing columns explicitly
I have a dataframe with ~300K rows and ~40 columns.
I want to find out if any rows contain null values - and put these 'null'-rows into a separate dataframe so that I could explore them easily.
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Insert picture/table in R Markdown [closed]
...n better, via options if you are using knitr (highly recommended ... check out chunk options, specifically under Plots).
I strongly recommend perusing these tutorials; markdown is very handy and has many features most people don't use on a regular basis but really like once they learn it. (SO is no...
Missing return statement in a non-void method compiles
...ode) and would never be executed. But why doesn't the compiler even warn about returning something? Or why would a language allow us to have a non-void method having an infinite loop and not returning anything?
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NHibernate.MappingException: No persister for: XYZ
...
Spending about 4 hours on googling and stackoverflowing, trying all of stuff around there, i've found my error:
My mapping file was called .nbm.xml instead of .hbm.xml. That was insane.
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Java - get the current class name?
...s = getClass().getEnclosingClass();
if (enclosingClass != null) {
System.out.println(enclosingClass.getName());
} else {
System.out.println(getClass().getName());
}
You can move that in some static utility method.
But note that this is not the current class name. The anonymous class is differ...
Importing a Maven project into Eclipse from Git
... the "Import..." context menu from the Package Explorer view
Select "Check out Maven projects from SCM" option under the Maven category
On the window that is presented choose the link "Find more SCM connectors in the m2e Marketplace
Find connector for Git...install...restart
Note that in the searc...
Stored procedure slow when called from web, fast from Management Studio
I have stored procedure that insanely times out every single time it's called from the web application.
7 Answers
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Else clause on Python while statement
...se is only executed when your while condition becomes false. If you break out of the loop, or if an exception is raised, it won't be executed.
One way to think about it is as an if/else construct with respect to the condition:
if condition:
handle_true()
else:
handle_false()
is analog...