小编mil*_*n-j的帖子

我在理解AttachedToParent参数如何工作时遇到了问题.

以下是示例代码:

public static void Main(string[] args)
    {
        Task<int[]> parentTask = Task.Run(()=> 
        {
            int[] results = new int[3];

            Task t1 = new Task(() => { Thread.Sleep(3000); results[0] = 0; }, TaskCreationOptions.AttachedToParent);
            Task t2 = new Task(() => { Thread.Sleep(3000); results[1] = 1; }, TaskCreationOptions.AttachedToParent);
            Task t3 = new Task(() => { Thread.Sleep(3000); results[2] = 2; }, TaskCreationOptions.AttachedToParent);

            t1.Start();
            t2.Start();
            t3.Start();

            return results;
        });

        Task finalTask = parentTask.ContinueWith(parent =>
        {
            foreach (int result in parent.Result)
            {
                Console.WriteLine(result);
            }
        }); …

当我偶然发现一些非常有趣的东西时,我正在测试我的一些Ruby 1.9代码.我希望有人可以解释为什么会这样.

这是代码:

inf = Float::INFINITY

x = inf - inf
y = 0.0/0.0

puts "X is #{x}"
puts "Y is #{y}"

puts "X and Y are both NaN." if x.nan? && y.nan?

puts "This is all as we expected, but here is the mystery..."

puts "X is not equal to Y." if x == y

puts "Surprisingly not even X is equal to X." if x == x

这是输出:

X is NaN
Y is NaN
X and Y are …