这返回Home接口的一个实例。
这返回一个写入器(writer)对象。
这返回一个行数组。
Because it says, your program will still give you a value, but it may not be what you intended, and you can't always tell, and that may propagate it's way down through a whole bunch of other computations before it causes some catastrophic failure.
因为这意味着,你的程序依然会返回一个值,但是这个值可能不是你想要的,你可能还分辨不出来,而且这种情况会传播,结果会沿着正果计算过程传播下去,直到产生一个灾难性的错误。
But it's a valuable thing. It says, in each case, I return some useful value from this procedure.
但是这就是变量,是在每个例子中,我从这个程序中返回了一些有用的值。
Do one comparison and return one of two possible orders on it, but I need to decide that.
虽然可以做一次比较,然后返回两个可能的顺序中的一个为结果,但是这需要我来做决定。
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