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How to pass an ArrayList to a varargs method parameter?
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@JoshM. Java needs a lot of things. ;) I also (coming from a C# background) miss index operators. Working with dictionaries is much more smooth in C# than working with HashMaps in Java.
– Per Lundberg
Jan 15 '19 at 9:12
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arrow operator (->) in function heading
...escribe type of an expression. So you might want to derive the return type from the argument types. So you try:
template <typename T1, typename T2>
decltype(a + b) compose(T1 a, T2 b);
and the compiler will tell you that it does not know what a and b are in the decltype argument. That is be...
Find nearest value in numpy array
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return n-1
else:
return jl
Now I'll define the code from the other answers, they each return an index:
import math
import numpy as np
def find_nearest1(array,value):
idx,val = min(enumerate(array), key=lambda x: abs(x[1]-value))
return idx
def find_nearest2(array, v...
Why are `private val` and `private final val` different?
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I think the confusion here arises from conflating immutability with the semantics of final. vals can be overridden in child classes and therefore can't be treated as final unless marked as such explicitly.
@Brian The REPL provides class scope at the line le...
Why cast unused return values to void?
...o overloaded operators (not using function call notation) should be exempt from this too:
class A {};
A operator+(A const &, A const &);
int main () {
A a;
a + a; // Not a problem
(void)operator+(a,a); // Using function call notation - so add the cast.
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How to customize the background/border colors of a grouped table view cell?
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One thing I ran into with the above CustomCellBackgroundView code from Mike Akers which might be useful to others:
cell.backgroundView doesn't get automatically redrawn when cells are reused, and changes to the backgroundView's position var don't affect reused cells. That means long tables...
Run a Java Application as a Service on Linux
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echo $PID > pid.txt
Then your stop script stop.sh would read the PID from the file and kill the application:
PID=$(cat pid.txt)
kill $PID
Of course I've left out some details, like checking whether the process exists and removing pid.txt if you're done.
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Detect if Android device has Internet connection
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@varunbhardwaj There should be some URI you can hit from your web services. The first thing we request when our app starts up is a bootstrap file that contains various configuration information, that allows us to change various parameters server-side. Something like that can ...
How to convert a java.util.List to a Scala list
...la Buffer is a Java List, then nothing is fine! The OP wanted a conversion from Java List to an immutable Scala List. Expressions that expect a Scala List won't typecheck with a Buffer.
– Andres F.
Jul 15 '16 at 18:58
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Background color not showing in print preview
... avoid the difficulties you are having. First, separate all your print CSS from your screen CSS. This is done via the @media print and @media screen.
Often times just setting up some extra @media print CSS is not enough because you still have all your other CSS included when printing as well. In th...