Is there a way to change tuple values inside of a C# array? [closed]

问题

The array I'm using is int[,,] and I want to make the first value of each (what I assume to be) tuple in one method and then I want to modify the second two values several times. (in another method)

For example:

int[,,] MyArrayGet()
{    
    int [,,] myArray;
    int [,,] myArray = new int[9,9,9];
    for (int i = 0; i < 10; i++)
    {
        myArray[i] = [SomeInt,0,0];
    }
    return myArray;
}
int[,,] MyArrayModify(int[,,] myArray)
{   
    for (int i = 0; i < 10; i++)
    {
        if (somthing is true) 
        {
            myArray[i] = [dont change this value,n+1,dont change this value]
        }
        if (somthingelse is true)
        {
            my  Array[i] = [dont change this value,dont change this value,n+1]
    }
}

Is there a quick and easy way to do this?

I have checked this question How to get array of string from List<Tuple<int, int, string>>? however either I do not feel it answers my question.

回答1:

Tuple by design is immutable. Just create new one when modifying.

IEnumerable<Tuple<int, int, int>> Get()
{
    for (int i = 0; i < 10; i++)
    {
        yield return Tuple.Create(i, 0, 0);
    }
}

IEnumerable<Tuple<int, int, int>> Modify(IEnumerable<Tuple<int, int, int>> tuples)
{
    foreach (var tuple in tuples)
    {
        if (tuple.Item1 < 5)
        {
            yield return Tuple.Create(tuple.Item1, tuple.Item2 + 1, tuple.Item3);
        }
        else
        {
            yield return Tuple.Create(tuple.Item1, tuple.Item2, tuple.Item3 + 1);
        }
    }
}

Your code looks like javascript more than C#. int[,,] is 3D array not array of 3 items.

Tuple<int, int, int>[] is an array of Tuple of 3 items. If you are not a beginner and use LINQ, IEnumerable<Tuple<int, int, int>> is a better version.

回答2:

You have to replace the tuple you want to modify by a new tuple containing the updated value. Alternatively, you can create a class with the fields that you need and public properties. That will only take seconds and probably make your code more readable.

来源：https://stackoverflow.com/questions/38498151/is-there-a-way-to-change-tuple-values-inside-of-a-c-sharp-array

标签

arrays

int

tuples