js有哪些改变自身值的方法

var array = ["cat", "dog", "cow", "chicken", "mouse"]

var item = array.pop()

console.log(array) // ["cat", "dog", "cow", "chicken"]

console.log(item)  // mouse

var array = ["football", "basketball",  "badminton"]

var i = array.push("golfball")

console.log(array) // ["football", "basketball", "badminton", "golfball"]

console.log(i)     // 4

var array = [1,2,3,4,5]

var array2 = array.reverse()

console.log(array)             // [5,4,3,2,1]

console.log(array2===array)    // true