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Efficient way to return a std::vector in c++
...urn value (by value) is: instead of 'been moved', the return value in the callee is created on the caller's stack, so all operations in the callee are in-place, there is nothing to move in RVO. Is that correct?
– r0ng
Sep 5 '18 at 5:59
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How to make a class conform to a protocol in Swift?
...aSource'
Is expected. You will get the error until your class implements all required methods of the protocol.
So get coding :)
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What is the difference between related SQLite data-types like INT, INTEGER, SMALLINT and TINYINT?
When creating a table in SQLite3, I get confused when confronted with all the possible datatypes which imply similar contents, so could anyone tell me the difference between the following data-types?
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Image fingerprint to compare similarity of many images
...d approach for improved comparison quality
A luminosity histogram (especially one that is separated into RGB components) is a reasonable fingerprint for an image - and can be implemented quite efficiently. Subtracting one histogram from another will produce a new historgram which you can process t...
What are the pros and cons of the leading Java HTML parsers? [closed]
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General
Almost all known HTML parsers implements the W3C DOM API (part of the JAXP API, Java API for XML processing) and gives you a org.w3c.dom.Document back which is ready for direct use by JAXP API. The major differences are usually to b...
How to properly seed random number generator
...se if you're setting the seed to the time in a fast loop, you'll probably call it with the same seed many times.
In your case, as you're calling your randInt function until you have a different value, you're waiting for the time (as returned by Nano) to change.
As for all pseudo-random libraries, ...
Elegant way to search for UTF-8 files with BOM?
For debugging purposes, I need to recursively search a directory for all files which start with a UTF-8 byte order mark (BOM). My current solution is a simple shell script:
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Calling a function within a Class method?
...c function newTest(){
$this->bigTest();
$this->smallTest();
}
private function bigTest(){
//Big Test Here
}
private function smallTest(){
//Small Test Here
}
public function scoreTest(){
//Scoring code here;
...
Is there a “null coalescing” operator in JavaScript?
...an results in false, the assignment will use the second operand. Beware of all the cases below:
alert(Boolean(null)); // false
alert(Boolean(undefined)); // false
alert(Boolean(0)); // false
alert(Boolean("")); // false
alert(Boolean("false")); // true -- gotcha! :)
This means:
var whatIWant = n...
How to do the equivalent of pass by reference for primitives in Java
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You have several choices. The one that makes the most sense really depends on what you're trying to do.
Choice 1: make toyNumber a public member variable in a class
class MyToy {
public int toyNumber;
}
then pass a reference to a MyToy to your method.
void play(MyToy toy){
...