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Why return NotImplemented instead of raising NotImplementedError
...otImplemented, interpreter runs the Reflection Function but on the flipped order of input arguments.
You can find detailed examples here
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How should one use std::optional?
...lacement new and a lot more other things with proper alignment and size in order to make it a literal type (i.e. use with constexpr) among other things. The naive T and bool approach would fail pretty quickly.
– Rapptz
Mar 13 '14 at 22:05
...
How are the points in CSS specificity calculated
...n CSS:
Specificities are compared by comparing the three components in order: the specificity with a larger A value is more specific; if the two A values are tied, then the specificity with a larger B value is more specific; if the two B values are also tied, then the specificity with a larger c...
How do you make a deep copy of an object?
...copy constructor. Obvious but might be overlooked.
Example:
public class Order {
private long number;
public Order() {
}
/**
* Copy constructor
*/
public Order(Order source) {
number = source.number;
}
}
public class Customer {
private String nam...
What does Serializable mean?
...en the answer, but I would like to add an example for those who need it in order to explain the idea:
Let's say you have a class person like the following:
public class Person implements java.io.Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
public ...
Should I be concerned about excess, non-running, Docker containers?
...mance or memory/storage penalties these non-running containers incur.
In order to assess how much storage non-running Docker containers are using, you may run:
docker ps --size --filter "status=exited"
--size: display total file sizes (FYI: Explain the SIZE column in "docker ps -s" and what "v...
How do I see the last 10 commits in reverse-chronological order with SVN?
...t X number of commits along with commit messages, in reverse-chronological order (newest commit first)?
4 Answers
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How to get all subsets of a set? (powerset)
...deally a set) into a list because by a set is a data structure of unique unordered elements, and the order will be crucial to generate the subsets.
selector is key in this algorithm. Note that selector has the same length as the input set, and to make this possible it is using an f-string with padd...
What is the difference between user variables and system variables?
...nment variables are 'evaluated' (ie. they are attributed) in the
following order:
System variables
Variables defined in autoexec.bat
User variables
Every process has an environment block that contains a set of environment variables and their values. There are two types of environment variables: ...
What are bitwise operators?
... to the right until it's at the bottom, then mask off the remaining higher-order bits:
Int Alpha = Color >> 24
Int Red = Color >> 16 & 0xFF
Int Green = Color >> 8 & 0xFF
Int Blue = Color & 0xFF
0xFF is the same as 11111111. So essentially, for Red, you would be doin...