C#等同于Java的Arrays.fill()方法

Question

我在Java中使用以下语句:

Arrays.fill(mynewArray, oldArray.Length, size, -1);

请建议等效的C#.

Answer 1

我不知道框架中有什么做到这一点,但它很容易实现:

// Note: start is inclusive, end is exclusive (as is conventional
// in computer science)
public static void Fill<T>(T[] array, int start, int end, T value)
{
    if (array == null)
    {
        throw new ArgumentNullException("array");
    }
    if (start < 0 || start >= end)
    {
        throw new ArgumentOutOfRangeException("fromIndex");
    }
    if (end >= array.Length)
    {
        throw new ArgumentOutOfRangeException("toIndex");
    }
    for (int i = start; i < end; i++)
    {
        array[i] = value;
    }
}

或者,如果要指定计数而不是开始/结束:

public static void Fill<T>(T[] array, int start, int count, T value)
{
    if (array == null)
    {
        throw new ArgumentNullException("array");
    }
    if (count < 0)
    {
        throw new ArgumentOutOfRangeException("count");
    }
    if (start + count >= array.Length)
    {
        throw new ArgumentOutOfRangeException("count");
    }
    for (var i = start; i < start + count; i++)
    {
        array[i] = value;
    }
}