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App restarts rather than resumes
...er/skin. I haven't seen the issue occur on a stock Android launcher.
Basically, the app is not actually restarting completely, but your launch Activity is being started and added to the top of the Activity stack when the app is being resumed by the launcher. You can confirm this is the case by clic...
Append to a file in Go
...
This answers works in Go1:
f, err := os.OpenFile(filename, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
panic(err)
}
defer f.Close()
if _, err = f.WriteString(text); err != nil {
panic(err)
}
...
How to sort an array of integers correctly
...
By default, the sort method sorts elements alphabetically. To sort numerically just add a new method which handles numeric sorts (sortNumber, shown below) -
var numArray = [140000, 104, 99];
numArray.sort(function(a, b) {
return a - b;
});
console.log(numArray);
...
When to use generic methods and when to use wild-card?
...eed such kind of relation, then you are free not to use type parameters at all.
Some other difference between using wildcards and type parameters are:
If you have only one parameterized type argument, then you can use wildcard, although type parameter will also work.
Type parameters support multi...
How to center align the cells of a UICollectionView?
...nt, you could adjust that one too, if you want to center the content vertically in the screen.
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Vim: What's the difference between let and set?
...iendly interface specialized for options
E.g.
:verbose set
to display all options in effect.
:set tw=40
Will work as a shorthand for set textwidth=40
:set wrap&
Will set the default value for option wrap
:set nowrap
Will unset the option
:set wrap!
Will toggle the option
Most i...
Line continuation for list comprehensions or generator expressions in python
...so you can pretty much do as you please. I'd personally prefer
[something_that_is_pretty_long
for something_that_is_pretty_long
in somethings_that_are_pretty_long]
The reason why \ isn't appreciated very much is that it appears at the end of a line, where it either doesn't stand out or needs...
Android list view inside a scroll view
...id:layout_marginTop="8dp"
android:text="This textview automatically goes below the Recycler View."
android:textSize="16sp" />
</androidx.appcompat.widget.LinearLayoutCompat>
</androidx.core.widget.NestedScrollView>
Now you can get rid of all the ugly hacks...
What version of javac built my jar?
...ersion the class has been compiled FOR, not what version compiled it. Java allows you to compile code so that they're compatible with earlier versions of Java. However, this only applies to byte code and format. It will happily compile code that references JDK 6 libraries into a JDK 5 format, for ex...
What is the difference between DSA and RSA?
...being a bit more complex than,
but related to El Gamal.
Note that nearly all the calculations are mod q, and
hence are much faster.
But, In contrast to RSA, DSA can be used only for digital signatures
DSA Security
The presence of a subliminal channel exists in many schemes (any that need a ran...