17,653
questions
4
votes
0
answers
68
views
Scope of underspecified declarations
C23 §6.2.1(7) contains some new wording related to underspecified declarations (highlighted in bold below):
Structure, union, and enumeration tags have scope that begins just after the appearance of ...
- 1,900
0
votes
1
answer
66
views
Why is scoped service injected in MainLayout.razor reinstanced? on every page
I wanted to create a data store that was accessible between different pages on the site. On every page I want the same code to run. Rather than putting it on every page I figured it would be best to ...
0
votes
1
answer
57
views
How to get inaccessible object when I can't declare it as public
Probably repeat question because it's so simple, but I can't find an answer to my problem. I'm new to c# and coding in general, and am still a little confused on objects and classes.
I want to access ...
2
votes
1
answer
76
views
gcc bug? name-hiding vs. specialization for class template with same name in derived class, but only when base class is also template
Is the error message shown below a gcc 13.1.0 bug? This code compiles fine under clang 18.0.2 and MSVC 19.41. This code even compiles OK on gcc if you change s0 into a non-template class. There is ...
- 3,763
-1
votes
1
answer
66
views
Variable set in if/else blocks says "not found in this scope" when printed afterward
fn gronsfeld_cipher(data: &str, keys: &[i32], space: char, decode: bool) -> String {
let alphabet = String::from("ABCDEFGHIJKLMNOPQRSTUVWXYZ");
let data = data....
- 23
-3
votes
3
answers
83
views
Why can't a derived class in Python reference inherited attributes in its definition? [duplicate]
I have this snippet:
class A(object):
def foo():
pass
class B(A):
bar = foo()
As written, this file will fail to run with the error NameError: name 'foo' is not defined. However, ...
- 135
1
vote
2
answers
85
views
Why can I sometimes assign to a variable in one function and print it in another?
I don't understand why this code works as it works. Maybe I don't understand what functions and namespaces in Python really are?
Example 1:
def f1():
a = 1
f2()
def f2():
print(a)
a = 0
...
- 19
0
votes
0
answers
69
views
Java lambda not able to access inner scope?
Consider this class:
import java.util.concurrent.Callable;
public class c
{
static interface a<T> extends Callable<T>
{
static <T> a<T> of(Callable<T> ...
- 17k
2
votes
1
answer
61
views
How to have a code block for a case statement for a switch that assigns a value?
As you know, Java 14 introduced Switch Expressions, switch statements that return a value. (See JEP 361.)
But it doesn't seem to work with case statements that have code blocks. I'm not sure if I don'...
- 8,407
1
vote
1
answer
66
views
Redefining the special form after the usage of that special form in one func definition has no effects to that definition in Scheme
I am reading SICP section 3.5.1 where it gives the implementation of primitive procedures provided in MIT/GNU Scheme.
I tried to load these implementations without considering the order since they are ...
- 485
1
vote
1
answer
57
views
PostgreSQL Dynamic Query Execution with Table-Valued Variables
I am working with code inside of a PostgreSQL pgsql function. I have a merge statement that has multiple elements that are only known at runtime and are supplied to the function as parameters, which ...
- 419
3
votes
2
answers
118
views
Two occurrences of a variable declared with 'my' but in two different packages in the same file
I haven't coded anything in Perl for a long time. Now I have started again and came across an interesting situation when coding two packages within a single '.pm' file. Until now I thought that if I ...
- 33
1
vote
2
answers
94
views
does nodejs's eval() would change the behavior of var keyword?
all these code snippets run in nodejs.
below are demo1.js, ps: run these code in nodejs rather than browser js engine
// demo1.js
var1 = 'var1'; // in nodejs or Chrome-V8 js engine, this line would ...
- 25
3
votes
0
answers
80
views
how to access phone location in Android app using Kotlin
My app runs on a private network in a remote location, so I'm really only interested in GPS coordinate, not WiFi assisted, but using the google play services integrated function is ok too. The rest of ...
- 31
3
votes
1
answer
80
views
Behavior of %>% when piping values to functions containing pipes
The below examples demonstrate that passing an object to deparse() and substitute() produces different output depending on whether the object is passed to the function with %>% and whether the ...
- 4,219