So "y" is a sort of a light-weight object, rather than a copy of a range of elements.

这里“y”是一个轻量级的对象，而不是“x”数组中元素的拷贝。

youdao

So "y" is a sort of a light-weight object, rather than a copy of a range of elements.

这里“y”是一个轻量级的对象，而不是“x”数组中元素的拷贝。

youdao