1,221 questions
-2
votes
0
answers
60
views
Why does list append inside a loop duplicate the last element? [duplicate]
I’m trying to append values to a list inside a loop, but instead of getting different values, the last value keeps getting duplicated.
Here is a simplified version of my code:
result = []
temp = []
...
1
vote
2
answers
113
views
Modify a mutable vector in chunks
I am very new at the ST monad, and have reached my wits end in trying to correct the error in the code below.
I have a buildChain function, which we can assume works, takes an Int and returns a list ...
- 167
0
votes
1
answer
85
views
Value of a mutable variable is not updated in XUnit test
I wrote an XUnit test in F# for a function that updates a mutable variable:
[<Fact>]
let ``UpdatePlayerOneAmountTests`` () =
//-- Arrange
let input = new StringReader "10"
...
- 3,042
2
votes
1
answer
73
views
Strange behavior when partitioning list of tuples into different lists [duplicate]
I found some really unexpected behavior today using python 3.12.4. I am trying to sort a list of tuples into 2 different lists in a list of lists based on the first number of the tuple. Instead, each ...
- 29
2
votes
2
answers
114
views
Lambda static vs mutable variable
I have encountered a lambda with static variable in the following answer https://stackoverflow.com/a/79631994/2894535 :
EXPECT_CALL(my_mock, foo(_))
.WillRepeatedly(InvokeWithoutArgs([](){
...
- 3,194
0
votes
0
answers
33
views
Nested mutable and immutable borrows in rust [duplicate]
MRE:
enum MRE_Enum {
variant1,
variant2,
}
struct MRE_Struct {
dummy1: Vec<MRE_Enum>,
dummy2: isize,
}
// Private functions together
impl MRE_Struct {
fn foo(&mut self) ...
- 2,338
2
votes
4
answers
160
views
Getting a mutable element from a std::set, for operations that won't break the order
I've got a data type that consists of actual data and an id:
struct Data {
int value;
int DataId;
};
I've got a collection of these data from which I have to frequently get an element based ...
- 3,914
2
votes
0
answers
62
views
Why does Rust scope include the else of an if conditional as well? [duplicate]
I have the below min repro application which is meant to build a graph (tree) from a vec (split string). (It is meant to be part of a larger loop that would modify the graph/tree multiple times.)
The ...
- 1,290
0
votes
0
answers
25
views
Making nested lists Vs making nested sets (without frozensets)
If I wanted to make a nested set:
nested_set = {{1, 2, 3}, {6, 4, 5}, {12, 8, 5, 7}}
It would give the error: TypeError: unhashable type: 'set'
However if I wanted to make a nested list:
nested_list =...
- 1
2
votes
0
answers
102
views
Assign to an expression
I'm learning Rust so getting to grips with mutable and non-mutable. I've copied code from several projects and it works well.
This is the ode_solver function for a two-pool compartmental model. My ...
- 1,759
0
votes
0
answers
39
views
In Unity with C# 8, how to use reflection to set a mutable field value? [duplicate]
Here is a simple example:
[System.Serializable]
public struct PlayerData
{
public string name;
public int level;
public float health;
}
[Test]
...
- 3,832
0
votes
1
answer
91
views
Start a forever thread with a expired objects loop, removing those objects, in rust
I am writing a service, and I want to run a loop forever that checks for some expired objects and removes them if too old.
pub struct Obj {
expired: NaiveDateTime,
}
pub struct Maintainer {
...
- 6,390
0
votes
1
answer
137
views
How to update a collection inside a struct in rust?
Probably this question already has been asked, maybe with different wording, but I couldn't find it. If this gets closed due to this, apologies, but I did try before.
In fact, the problem is simple:
...
- 6,390
1
vote
1
answer
118
views
Does a mutable reference means an ownership loss in Rust?
This exercice from Rustlings, once corrected, gives:
fn move_semantics4() {
let mut x = Vec::new();
let y = &mut x;
y.push(42);
let z = &mut x;
z....
- 1,136
-1
votes
1
answer
74
views
Python List NOT modifying in place while splicing?
I have a list of chars. I want to insert a string in between the chars at given index.
For that I wrote a function to insert the item (string) in the list in-place. The list inside the function is ...
