4,475 questions
Score of 0
1 answer
95 views
Assigning a zsh array via a nameref
Using zsh 5.9:
I would like to create a function which can be called with a name as parameter, and then creates an array of this name. Usage example:
creator myarr
should create and populate the ...
- reputation score 23037
Score of 1
3 answers
229 views
no match for call to '(student) (std::string&, int&, int&)'
I'm trying to create an array of class student that I initialize later:
#include <iostream>
#include <string>
using namespace std;
class student{
private:
string name;
...
- reputation score 9
Score of -4
4 answers
145 views
Why does this assignment fail but not cause an error?
In this python I expect either for x to be assigned to 1, OR for an error/exception to be raised. Instead, nothing happens. The statement is not an error but it also has no effect.
x = 0
[x][0] = 1
...
- reputation score 3889
Advice
0
votes
13
replies
88
views
Scope of variables
I'm working in the WinDev programming language/environment in which the variable scope looks rather weird to me. Consider the following pseudocode
while condition
string txt
if condition2
...
- reputation score 102
Best practices
0
votes
0
replies
36
views
How can I update the value of a variable once per month during an Arena simulation run?
I am running a simulation for one full year, and I need a specific variable (for example, a defective rate percentage) to change once every month. The variable is not related to resources, arrivals, ...
- reputation score 1
Score of 2
3 answers
142 views
Bash function to output variable's name and value
Instead of writing:
echo "variable: $variable"
when debugging, I would like to do it all with a function, say:
print "$variable"
So far I have got this working:
t=https://www....
- reputation score 449
Tooling
3
votes
3
replies
148
views
In Raku, how to assign a value but only if the value is defined?
I want to assign
my $FOO = $foo if $foo.defined;
I tried
my $FOO with= $foo;
but that doesn't work. Is there a canonical way to do this?
- reputation score 1865
Score of 3
1 answer
156 views
what does assignment to $null do in ($var=$null="...")
I saw in a script this kind of command:
Write-Verbose -Message ($var=$null="foo=$(<some computation>)")
<do something more with $var>
What is the point of assigning the string ...
- reputation score 753
Score of -4
2 answers
168 views
Blackhole assignment in R [duplicate]
Suppose I have the following:
df1 <- data.frame(id=c(1,2,3))
df2 <- data.frame(id=c(2,3,4))
I want to print: (1) The number of IDs in df1 but not in df2, (2) the number of IDs in df2 but not in ...
- reputation score 6451
Score of 1
1 answer
170 views
In Ansible YAML, how do I pass different variables to an include_tasks to make it reusable?
I have a workflow where I download a file, do some stuff to it, upload it, and then download it again to verify that the changes took place. I want my download logic to be in a reusable YAML file that ...
- reputation score 1557
Score of -4
1 answer
113 views
COBOL assignment debugging [closed]
Here is the prompt for my class assignment:
Create an interactive program for ice cream sales you must sell at least four flavors of ice cream and you must us an evaluate statement. The ice cream ...
- reputation score 1
Score of 3
2 answers
153 views
Is there any way to move a string into a variable?
I was playing around in assembly and noticed that it's possible to overwrite a string in a variable as long as the new string does not exceed the size of the original string:
MESSAGE DB 'Hello World', ...
- reputation score 702
Score of 0
1 answer
140 views
Confusion about post-decrement and assignment execution order in C [duplicate]
I'm confused about the behavior of the post-decrement (i--) and pre-decrement (--i) operators in C, especially when used in the context of array indexing and assignment. I'm trying to understand the ...
- reputation score 13
Score of 5
0 answers
170 views
Under what circumstances does the Visual Studio compiler issue warning C4706 about assignment used as a condition?
My colleague Zag found that warning C4706: assignment used as a condition is detected by MSVC with /Wall switch only for some expressions and not for others.
In the following example:
#include <...
- reputation score 25740
Score of 1
1 answer
368 views
Understanding the difference between ??=, ?= and = for bitbake variables
When looking up something in the Yocto project reference manual, I sometimes encounter ??= or ?= operators. Normally, a simple = is used in recipes instead.
What's the difference between ??= and a ...
- reputation score 2441