[Resolved] - Duplicate Int[]

I want to duplicate an array of int[] into another one.
(If the array is NULL, then have the new array be NULL, if it contain X elements, then have the new array contain X elements also)

Is there a build in function to do that?
I've try copyTo and Clone without success.

Thks

pfffff instead of looking around for hours I've made my own function to do it.

VB Code:

private int[] copierTableauInt (int[] intLeTableau) {
    if (intLeTableau == null) return (null); // Tableau Non-instancié
    int[] intretTableau = new int[intLeTableau.Length];
    // itérations sur tous les éléments int du tableau source
    for (int i = 0; i < intLeTableau.Length; ++i) {
        intretTableau[i] = intLeTableau[i];
    }
    return (intretTableau);
}

Why would you not just use CopyTo? Just create another array of the same length and type and then call:

Code:

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arr1.CopyTo(arr2, 0)

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That's the problem, I don't know in advance what will be the size of the source array. And it could be a null one. So using myArray.Length to create a new array could end up with an error.

Code:

---

int[] arr1;
int[] arr2;

if (arr1 == null)
{
    arr2 = null;
}
else
{
    arr2 = Array.CreatInstance(typeOf(Int32), arr1.Length);
    arr1.CopyTo(arr2, 0);
}

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And if I was to use if to detect the presence of null array each time I need to copy an array it would be a very unbeautiful code. Now I have only one line of code to copy an entire array. Not quite rapid but it doesn't matter for this kind of project.

Aahahha you post what I was writing to avoid at that time!

That's definitely what I don't want. I must copy quite a few array. I want also to reduce redundancy of my code.

OK I missed that bit earlier, but you should still use that code or something similar in a function of your own that you can then call from anywhere.

I guess the copyTo don't create the array, it must already be created. I prefer using built-in code which often result in a more efficient, more beautiful and a less error prone code.

Quote:

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Aahahha you post what I was writing to avoid at that time!

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Just a coincidence that both of use wrote a reply at the same time and not knowing that the other was doing the same. This remind me kind of bug you can have with a dabatase ehhehe

Well, there is also the Clone method, but that's an instance member so you can't use it if your original array is a null reference. You could do this though I guess:

Code:

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int[] newArray = (oldArray == null ? null : oldArray.Clone());

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Yes it's becoming more and more elegant :)

I didn't though of that one, pretty nice

Quote:

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int[] newArray = (oldArray == null ? null : oldArray.Clone());

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You would probably have to cast the return value of Clone as int[] also.