func Questions
2
Solved
In my python code, I import func...
from sqlalchemy.sql.expression import func
Then, during my code I select data from a database table...
select(func.max(MyTable.my_datetime))
...where my_dateti...
Akins asked 20/3, 2023 at 10:52
7
Solved
Why is a Func<> created from an Expression<Func<>> via .Compile() considerably slower than just using a Func<> declared directly ?
I just changed from using a Func<IInte...
Unideaed asked 18/11, 2010 at 3:27
13
14
Solved
I'm trying to write a basic go program that calls a function on a different file, but a part of the same package. However, it returns:
undefined: NewEmployee
Here is the source code:
main.go:
...
7
Solved
I have Go program that has a function defined. I also have a map that should have a key for each function. How can I do that?
I have tried this, but this doesn't work.
func a(param string) {
}
...
Wehner asked 20/7, 2011 at 21:54
10
Solved
Can someone provide a good explanation (hopefully with examples) of these 3 most important delegates:
Predicate
Action
Func
3
I am trying to implement a fetch mock function in my test. Following tutorials I am trying to do this by using jest.fn():
const fetchFunction = jest.fn(() => {
return null
})
This does not wor...
2
Solved
Is there anything wrong with my code here? I keep getting this error:
System.InvalidOperationException: The request message was already sent. Cannot send the same request message multiple times....
Tubbs asked 30/7, 2014 at 21:28
1
Solved
I have func<Task> delegates in my project which can be null. Is there any way to make the call of such a delegate simpler as displayed below?
public async Task Test()
{
Func<Task> func...
Equate asked 20/5, 2021 at 15:19
4
Solved
How to get the value of the passed parameter of the Func<> Lambda in C#
IEnumerable<AccountSummary> _data = await accountRepo.GetAsync();
string _query = "1011";
Accounts = _data.Filte...
2
Solved
Disclaimer: this question is driven by my personal curiosity more than an actual need to accomplish something. So my example is going to be contrived.
Nevertheless I think it's an issue that might ...
3
Solved
I've read multiple posts and blogs similar to
Delegate-based strongly-typed URL generation in ASP.NET MVC
But none of them really quite do what I'd like to do. Currently I have a hybrid approach ...
Rigby asked 17/12, 2015 at 22:44
1
Solved
I have a SwiftUI View called MyWatchView with this stack:
VStack (alignment: .center)
{
HStack
{
Toggle(isOn: $play)
{
Text("")
}
.padding(.trailing, 30.0)
.hueRotation(Angle.degr...
2
Solved
every Parameter object property that is not null, to be added to expression predicate as a condition
I am looking for a way to dynamically build an expression, based upon the method parameters.
This is the code snippet from my service method, where I would like to build a predicate expression.
...
Saldivar asked 10/3, 2020 at 15:51
1
Solved
I'm running into an issue where some test code for a library I'm writing won't compile due to an ambiguous call but the usage seemed clear to me. Upon further investigation I've found that ad...
Kannada asked 23/2, 2020 at 4:21
4
Solved
In C# is it possible to pass a method a nullable Func?
Neither Func<A, bool>? nor Func?<A, bool> is working.
2
Solved
I am refactoring a large iOS Swift project gradually. Some function have to be renamed and I cannot rename directly because many other modules directly calling it. Instead, for the first phase rele...
Deponent asked 31/10, 2019 at 8:55
2
Solved
I'm learning Swift 2 (and C, but also not for long) for not too long and I came to a point where I struggle a lot with recursive enumerations.
It seems that I need to put indirect before the enum ...
3
Solved
I am wondering if this is a sane choice of key for a dictionary? What I want to do is use an expression as the key in a dictionary, something like:
var map3 = new Dictionary<Func<int, bool&...
Downwind asked 16/11, 2012 at 2:15
5
Solved
#include <stdio.h>
void someFunc(void) {
printf("%s\n"), __func__);
}
Each time the function is called it will print:
someFunc
What is the java equivalent?
I have found
(new Exception...
Sofiasofie asked 26/3, 2011 at 0:11
1
Solved
As input to another program I am using I need to input a delegate of the form:
Func<double, double, double>.
I want the function to be sent in to be
F(a,b)=a+b*c+d
where c and d are...
5
Solved
I found myself confused with the array and slice data types.
From Go docs, arrays are described as follows:
There are major differences between the ways arrays work in Go and C. In Go,
Arr...
Lalia asked 31/7, 2012 at 9:29
4
Solved
Starting from C# 7.0 the throw keyword can be used both as an expression and as a statement, which is nice.
Though, consider these overloads
public static void M(Action doIt) { /*use doIt*/ }
publi...
Hekking asked 15/1, 2019 at 23:8
5
Solved
I am using FluentValidation and I want to format a message with some of the object's properties value. The problem is I have very little experience with expressions and delegates in C#.
FluentVali...
Hudgens asked 5/1, 2013 at 0:40
2
Solved
I have been searching on internet to find out the difference between Func and Expression Func, somehow i got the point,the first one is just a function gets the data and then apply the functi...
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