how to check if an array contains an int.

Hi, I'm kinda a beginner and need some help. my goal is to check if an int array contains a specific int. like for example, a 1. unfortunately, i have no idea how to do this. i tried looking it up and found a bunch of talk about predicates and delegates, and i have no idea how any of it works. I'm fairly confused and just need some help.

thanks in advance!

 

https://docs.microsoft.com/en-us/dotnet/api/system.array.exists?view=netframework-4.7.2#examples

 

Lurking-Ninja's answer will also work, but the simplest way to do this:

myArrayVariable.Contains(1);

 

it says "int[] does not contain a definition for Contains..." so that doesn't seem to be working.

 

i checked out the page, and I'm still nowhere close to understanding how to use a predicate, it just doesn't make sense to me.

here's some of what i have at the moment

Code (CSharp):

1. public int[] openingDir;
2.  
3. bool FindB(int var)
4.     {
5.         if (var - 1 == 0)
6.             return true;
7.         else
8.             return false;
9.     }
10.  
11.  
12.     void Spawn()
13.     {
14.         if (spawned == false)
15.         {
16.             Predicate<int> B = FindB;
17.  
18.  
19.             if (Array.Exists(openingDir, FindB(1))

at the "FindB(1)" in "if (Array.Exists(openingDir, FindB(1))" it says "Argument 2: cannot convert from "bool" to "System.Predicate<int>"

i've tried having the type of predicate be bool, or blank, but that message doesn't change.

 

Never ever use the word "var" as variable name. It's too confusing.

Like the example says on the link I gave you:

Code (CSharp):

1. void Spawn()
2.     {
3.         if (spawned == false)
4.         {
5.             if (Array.Exists(openingDir, el => el == 1)

If you don't understand this yet, feel free to use the

Code (CSharp):

1. openingDir.Contains(1);

as @soreric advise you and you can return to the predicates and more complex search-problems later.

 

As a beginner I feel doing this manually might be beneficial.

Imagine you have a bunch of boxes to look in, all in a line? You might check the first box, and if you don't find what you are looking for you move along to the 2nd, etc. Until you either find what you were looking for or run out of boxes to check...

How would you write a for loop to look at every element of the array?

In the for loop how would you check if the element matches the number you are looking for?

 

Add

Code (CSharp):

1. using System.Linq;

To the top of your file.