What is wrong with the question?

[davidktw]

Recently I come across a programming test question in real life. I'm not the candidate and neither did I set this question.
The codes are irrelevant to what I'm asking. Lets see if any keen eyes, especially those that think programming is simple just copy and paste realise the glaring mistake with the question.
If you can provide code example to illustrate your answer, even better!

 

[Trader11]

I don't know JS. But from my research, JavaScript will pass by value. In the case where another variable is assigned to variable, then that value will be the value of the variable "reference". Technically, pass by reference is not strictly correct

Ref: https://www.w3docs.com/snippets/jav...s-by-reference-or-pass-by-value-language.html

 

[davidktw]

I don't know JS. But from my research, JavaScript will pass by value. In the case where another variable is assigned to variable, then that value will be the value of the variable "reference". Technically, pass by reference is not strictly correct

Ref: https://www.w3docs.com/snippets/jav...s-by-reference-or-pass-by-value-language.html

Well done.... There is no pass-by-reference in Javascript nor in Java nor in quite a number of programming languages out there.

Now.. show us which programming language has pass by reference and how it works.

 

[Trader11]

Well done.... There is no pass-by-reference in Javascript nor in Java nor in quite a number of programming languages out there.

Now.. show us which programming language has pass by reference and how it works.

今晚赏月先。。。。

 

[davidktw]

今晚赏月先。。。。

月亮都还没驾到

 

[davidktw]

Find out yourself for your own good.

Spoiler

Are you sure ?

Spoiler

Absolutely sure ?

Spoiler

LOL.

#include <iostream>

using namespace std;

void mutator(int &i) {
  i = 123;
}

int main(int argc, char** argv) {

  int i = 456;
  cout << i << endl;
  mutator(i);
  cout << i << endl;

  return 0;
}

$ ./passbyref
456
123

<?php

function mutator(&$i) {
  $i = 456;
}

$i = 123;
print "$i\n";
mutator($i);
print "$i\n";

?>

$ php passbyref.php
123
456

 

[peterchan75]

Visual Basic and Excel VBA has ByVal and ByRef.

 

[sunny189]

Well done.... There is no pass-by-reference in Javascript nor in Java nor in quite a number of programming languages out there.

Now.. show us which programming language has pass by reference and how it works.

Hello there are popular language support referencing and its very easy to understand. I will just quote from the manual so nothing special from my end

In PHP:

<?php
function foo(&$var)
{
    $var++;
}

$a=5;
foo($a);
// $a is 6 here
?>

In C#

void Method(ref int refArgument)
{
    refArgument = refArgument + 44;
}

int number = 1;
Method(ref number);
Console.WriteLine(number);
// Output: 45

I personally don't use reference alot because it will easily introduce bugs and hard to debug on data.