How do you create a List to store variables?

February 14th, 2012, 11:34 AM

I got done what I wanted. Initially I was wanting to create a List so that I could print things out in a specific order via Print() command for later use in excel.

But I figured out how to set up a DDE with NT and excel, so I am able to directly populate a spreadsheet the way I want.

Thanks.

February 14th, 2012, 12:10 PM

gomi

You can access a List<T> by index.

List<double> will have a better performance than ArrayList because doubles won't be casted to objects when inserting, and objects won't be casted to doubles when accessing. List<double> will also be safer because you will always be sure your list only contains valid doubles, not random objects.

So IMO you'd better use List<double>. ArrayLists are legacy objects used before generic collections appeared in .NET 2.0

Usage is easy, here is an example I found on C# List Examples

Code

    
List<int> list = new List<int>();

list.Add(2);     
list.Add(3);     
list.Add(7);     

foreach (int prime in list) // Loop through List with foreach     
{         
Console.WriteLine(prime);     
}

Oops you are definitely right. Momentary brainfart there.

March 27th, 2012, 02:11 PM

Fat Tails

You can use an ArrayList object. It is basically an array with a variable size, which allows you to add elements of various data types.

Step 1: create the array list:

Code

private ArrayList  myArray = new ArrayList();

You have now an empty ArrayList.

Step 2: Add elements to your array list:

Code

myArray.Add((double)(Input[0]));

It is important to specify the data type that you add.

Step 3: Retrieve the stored value.

Code

value =  (double) myArray[5];

This will retrieve the 6th value that you have added.

Tip

When adding or retrieving a value, you need to specify the data type which is stored in the array list. Without adding (double) in front of the array element, neither adding nor retrieving a value will work.

Of course you can use other data types, for example you can add (string) values.

Further information on array lists is here:

ArrayList Class (System.Collections)

C# ArrayList Tips

I'm working off this one as it is the simplest presented in this thread. But it doesn't seem to work in NT? I get this error.

March 27th, 2012, 02:45 PM

Basically the structure would be like the attached picture, where as certain conditions occur or are met, I can just throw the value in whatever index the next empty slot is.

Then be able to access the values later, or reset the container.

March 27th, 2012, 05:17 PM

forrestang

I'm working off this one as it is the simplest presented in this thread. But it doesn't seem to work in NT? I get this error.

You probably need to add something like this to the top of the code (in the declarations section):

Code

using System.Collections

March 27th, 2012, 05:43 PM

NJAMC

You probably need to add something like this to the top of the code (in the declarations section):

Code

using System.Collections

Oh wow, thanks, at least it compiles now! I'm so bad at writing ninjaScripts.

Will try it again in a bit.

How do you create a List to store variables?

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How do you create a List to store variables?