[C#] function as parameter

Question

How to pass function as parameter for another function?
I want to use inline function. Create and use it at the same time

Delegate creation:
`public delegate bool delCheck(string value);`

Answer 1

So, simply you can create a function, and then pass it as parameter
`public bool MyCheck(string str) {
// Some checking
return true;
}
AddCheck(MyCheck); // Passing function as paramter
}`

Second variant is to create inline function:
`AddCheck(new delCheck((str) => {
return true;
});`

There i created anonymouse function and passed it as parameter.

3rd way to do it is use Func<bool>
You can specify parameters, separating them by coma, and last type is return type.
Example: Func<int, bool> will have parameter of type int and return bool.

`AddCheck(Func<string, bool> checker) {
// checks
}`

It might be useful to create many checks

Answer 2

@Ken Kaneki
It is like sorting. You need to sort some list of object only ones, but yes, in most cases i prefere to write functions(Only if i dont have 10 or more checks :/)
P.S joking maybe

Answer 3

@Ken Kaneki Ok, nice. But if i want to create inline method, ah? ;~)
Anyway thx for code, i'm too lazy to write it :/

Answer 4

I just wrote a working example of how you can define and use a function as a parameter for another function. I'll copy it here below, and you can find it on my codes, and play with it there.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
Function(Checker);
}

static bool Checker()
{
return true;
}

static void Function(Func<bool> check)
{
if (check())
{
Console.WriteLine("2017 meme");
}
}
}
}

Answer 5

If you want it to be inline, then yeah, lambdas are the way to go, but do you really want to make condition-checking functions that way? Reusability seems like a key feature for these types of function...