All Questions
401
questions
0
votes
1
answer
34
views
R Reference Class Add New Variable by Name
Consider the following R code :
MyClass <- setRefClass("MyClass",
fields = list(
),
methods = list(
initialize = function(x){
#give new attribute x
...
- 344
0
votes
1
answer
31
views
How Python know that it has to give a new address for a variable?
So I found out Python always passed by reference and append always store reference to the appended variables, so I was curious about how append as the following code don't give 10 10s:
ls = []
for i ...
- 37
0
votes
1
answer
33
views
Is there a way concatenate a cell value into a page reference function to reference pages with the name of that cell value?
Essentially I am creating a budget that utilizes 2 sheets and want to be able to create copies without manually having to manually update each page name reference with every new set.
I have pages ...
- 3
2
votes
2
answers
66
views
Powershell store variable in a hashtable and resolve the value later on
Let me start by saying I'm fairly certain I'm not using the correct terms, so please correct me where needed.
Here's the situation, I'm a ham radio operator and I have multiple radios that I program ...
- 21
1
vote
1
answer
158
views
How to get reference to the function or variable with the same name in Kotlin?
The problem is when I try to get the reference to testVar variable in Kotlin, ambiguity occurs if I have a function with the same name as the variable. Is there a solution for this?
class ...
4
votes
5
answers
264
views
Why does "setf" not work when using "let"?
The behavior of setf when combined with let is confusing to me. Here, setf isn't changing the second value of my list.
(defun to-temp-field (lst)
(let ((old-value (nth 2 lst))
(new-value '...
- 119
0
votes
1
answer
104
views
How to count references in java correctly?
I have difficulties understanding how to correctly count a reference variables.
Example (adopted from some book for java learning):
class Car {
}
class Example {
public static void main(String[] ...
0
votes
0
answers
31
views
php script with "&" in reference variable [duplicate]
I have a script php code
<?php
class A
{
public $x;
}
$a = new A();
$a->x = 10;
$b = &$a;
$b = new A();
$b->x = 20;
echo $a->x;
When try to understand code I think the result ...
0
votes
0
answers
56
views
How to return a variable by reference in PHP?
This is my code:
function &query_test(....)
{
$ret = array(....);
return ($ret);
}
Why do I get a strict warning on PHPStorm saying
"Only variables can be returned by reference"
I ...
- 11
1
vote
0
answers
35
views
Are PHP zvals mutable?
I've been reading about memory management in PHP and learned that variables in PHP copy the reference to zvals as long as you don't do a write operation (copy on write paradigm).
https://www....
- 338
0
votes
2
answers
89
views
Reference Variables In C++ [duplicate]
I need assistance in understanding why reference variables are used in C++. The reference variables points to other variables since they are an alias of other variable
We are able to create
int x = 10;...
1
vote
1
answer
87
views
golang updating slice value is not reflected in container object
package main
import (
"fmt"
)
func main() {
root := map[string]interface{} {
"disney": "world",
}
fmt.Printf("main begin %v\n", ...
- 13
0
votes
2
answers
48
views
How can you pass a variable to an other function in Python and set value to it? [duplicate]
I would like to pass a variable to an other function and in that function change the value of it.
Here is an example of the problem:
class TestClass:
_g_a: int
_g_b: int
def __init__(self)...
- 93
-7
votes
2
answers
65
views
Why am I getting an output of always 1 in the below code
I was writting a program to assign the Value of N to M in the declaration statement.If i gave value of N in declaration i get the same value in output.But if i read from user ,i am getting 1 always
#...
0
votes
0
answers
31
views
any way to update parent variable when updating its alias?
How to update the parent variable when updating its alias?
This is what I'm doing right now.
parent = 3
alias = parent
alias = 4
print(parent)
=====
the result is 3.
but the expected is 4.
- 400