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Map and Reduce in .NET
...d Reduce so I created a few extension methods you can use:
IEnumerable<string> myStrings = new List<string>() { "1", "2", "3", "4", "5" };
IEnumerable<int> convertedToInts = myStrings.Map(s => int.Parse(s));
IEnumerable<int> filteredInts = convertedToInts.Filter(i => i...
Show or hide element in React
... && false && 2; // will output false
true && 'some string'; // will output 'some string'
opened && <SomeElement />; // will output SomeElement if `opened` is true, will output false otherwise (and false will be ignored by react during rendering)
// be careful wi...
Can you write virtual functions / methods in Java?
...println("I eat like a generic Animal.");
}
public static void main(String[] args)
{
List<Animal> animals = new LinkedList<Animal>();
animals.add(new Animal());
animals.add(new Fish());
animals.add(new Goldfish());
animals.add(new OtherAnimal());...
POST data in JSON format
...on; charset=UTF-8');
// send the collected data as JSON
xhr.send(JSON.stringify(data));
xhr.onloadend = function () {
// done
};
};
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How to get UTC time in Python?
....strftime("%s"))
If you want microseconds, you need to change the export string and cast to float like: return float(now.strftime("%s.%f"))
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How to Define Callbacks in Android?
...lements NewInterface{
NewClass newClass;
public static void main(String[] args) {
System.out.println("test...");
JavaApplication1 myApplication = new JavaApplication1();
myApplication.doSomething();
}
private void doSomething(){
newClass = new Ne...
Asterisk in function call
...
Maybe strings are not the best example because not everybody sees strings as iterables. Btw: Instead of chain(*it) I'd write chain.from_iterable(it).
– Jochen Ritzel
Mar 9 '11 at 0:46
...
Accessing member of base class
...ord. Here is an example of how they work:
class Animal {
public name: string;
constructor(name: string) {
this.name = name;
}
move(meters: number) {
console.log(this.name + " moved " + meters + "m.");
}
}
class Horse extends Animal {
move() {
consol...
Do I have to guard against SQL injection if I used a dropdown?
...less, you must use Prepared Statements (recommended) or mysqli_real_escape_string. Also properly escape the values when outputting them (e.g. use htmlspecialchars() in a HTML document).
– ComFreek
Mar 20 '14 at 18:12
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How can I make a WPF combo box have the width of its widest element in XAML?
...about this in WinForms, where I would use the text APIs to measure all the strings in the combo box, and set the min width to account for that. Doing the same is considerably more difficult in WPF, especially when your items are not strings and/or are coming from a binding.
– ...