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In C++, what is a virtual base class?
... wrong?
Imagine:
A has some basic feature.
B adds to it some kind of cool array of data (for example)
C adds to it some cool feature like an observer pattern (for example, on m_iValue).
D inherits from B and C, and thus from A.
With normal inheritance, modifying m_iValue from D is ambiguous and th...
How to add a separator to a WinForms ContextMenu?
...
ContextMenu has a constructor which receives an array of MenuItem objects. Needless to say, you can't add a string to that array. You can however get a seperator by adding a new MenuItem("-"):
var contextMenu = new ContextMenu(new[]
{
timerMenuItem,
...
How can I get a collection of keys in a JavaScript dictionary? [duplicate]
...if you want key and value, you can use Object.entries(), often paired with Array.prototype.forEach() like this...
Object.entries(driversCounter).forEach(([key, value]) => {
console.log(key, value);
});
Alternatively, considering your use case, maybe this will do it...
var selectBox, opti...
How do I use itertools.groupby()?
... very late to the party but might help someone. It's probably because your array is not sorted try groupby(sorted(my_collection, key=lambda x: x[0]), lambda x: x[0])) under the assumption that my_collection = [("animal", "bear"), ("plant", "cactus"), ("animal", "duck")] and you want to group by ani...
Nested attributes unpermitted parameters
...attributes. This also works if the nested attributes are in the form of an array.
Having said that, I wonder if there's a security concern with this approach because it basically permits anything that's inside the hash without specifying exactly what it is, which seems contrary to the purpose of st...
How do I resize a Google Map with JavaScript after it has loaded?
... google.maps.event.trigger(map, 'resize');
});
map_array[Next].setZoom( map.getZoom() - 1 );
map_array[Next].setZoom( map.getZoom() + 1 );
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How to avoid null checking in Java?
...h methods that return collections, it's easy: return empty collections (or arrays) instead of nulls pretty much all the time.
With non-collections it might be harder. Consider this as an example: if you have these interfaces:
public interface Action {
void doSomething();
}
public interface Par...
How to get first N elements of a list in C#?
...ist with n elements in it (assuming that that many are available). Use .ToArray() or .ToList() on the result of the Take to get a concrete array or list.
– Andrew Webb
May 22 at 7:56
...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
... which shows that:
package com.stackoverflow.q14491966;
import java.util.Arrays;
public class Test {
public static void main(String[] args) throws Exception {
QuickRandom qr = new QuickRandom();
int[] frequencies = new int[10];
for (int i = 0; i < 100000; i++) {
...
What's wrong with using $_REQUEST[]?
...e, I personally would avoid $_REQUEST and, if I needed a combined GET+POST array, create it manually.
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