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One-liner to check whether an iterator yields at least one element?
...therwise, you could use, in the sentinel role, any value which you "know" (based on application considerations) that the iterator can't possibly yield.
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How to not run an example using roxygen2?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How do I get only directories using Get-ChildItem?
...sions less than 3.0:
The FileInfo object returned by Get-ChildItem has a "base" property, PSIsContainer. You want to select only those items.
Get-ChildItem -Recurse | ?{ $_.PSIsContainer }
If you want the raw string names of the directories, you can do
Get-ChildItem -Recurse | ?{ $_.PSIsContain...
How to load program reading stdin and taking parameters in gdb?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Is it possible to declare a variable in Gradle usable in Java?
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I'm using this code and working very fine.
def baseUrl = '\"http://patelwala.com/myapi/"'
def googleServerKey = '\"87171841097-opu71rk2ps35ibv96ud57g3ktto6ioio.apps.googleusercontent.com"'
android {
buildTypes {
release {
minifyEnabled true
proguardFil...
Extract a substring according to a pattern
..._ as a separator and made two separate variables for the prefix and suffix based on @Grothendieck answer: prefix <- sub("_.*", "", variable) and suffix <- sub(".*_", "", variable)
– swihart
Nov 13 '15 at 19:45
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Any way to make a WPF textblock selectable?
... protected override void OnMouseDown(MouseButtonEventArgs e)
{
base.OnMouseDown(e);
Point mouseDownPoint = e.GetPosition(this);
StartSelectPosition = this.GetPositionFromPoint(mouseDownPoint, true);
}
protected override void OnMouseUp(MouseButtonEvent...
What is the proper way to re-attach detached objects in Hibernate?
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Persistent objects work great, the dirty flag is set based on the delta between the initial load and the value(s) at flush() time. Detached objects need, and don't currently have this functionality. The way for hibernate to do it is to add an additional hash/id for detached o...
Creating the Singleton design pattern in PHP5
...en there are multiple subclasses.
Here is a correct inheritable Singleton base class.
class Singleton
{
private static $instances = array();
protected function __construct() {}
protected function __clone() {}
public function __wakeup()
{
throw new Exception("Cannot unse...
What is the best way to compute trending topics or tags?
...e total number of days, sum of views, and sum of views squared in your database. If you have historic data, initialize these fields using that data, otherwise initialize to zero. At the end of each day, calculate the z-score using the day's number of views against the historic data stored in the thr...