相关疑难解决方法(0)

有没有办法清空数组,如果可能的话.remove()？

例如,

A = [1,2,3,4];

我该如何清空？

请阅读下面代码中的注释,以了解我想要问的内容.

预期输出:根据JavaScript中的pass-by-reference机制,objOne预计会{}在最后登录,因为objTwo已初始化{}.

var objOne = {
  x: 1,
  y: 2
};

var objTwo = objOne;

// change the x vlaue to 2 by objTwo
objTwo.x = 2;

// Change the value of key x in objOne as well - pass by reference mechanism
console.log(objOne); // { x: 2, y: 2 }

/*** Pass by reference is understood in code, above this comment ***/

// Now what if objTwo initialized with empty …