20/10/29 21:10:47.05 wtq/xrTf.net
>>797 JavaScript
class List {
#data = []
push(n) {
this.#data = [n, this.#data]
return this
}
pop() {
const [head, tail] = this.#data
if (tail) this.#data = tail;
return head
}
toArray() { return this.#data.flat(Infinity) }
toString() { return String(this.toArray()) }
toJSON() { return this.toArray() }
}
const list = new List
list
.push(0)
.push(7)
.push(2)
console.log('文字列: ' + list) //=> 文字列: 2,7,0
console.log('JSON: ' + JSON.stringify(list))
//=> JSON: {"test":[2,7,0]}
list.pop() //=> 2
list.pop() //=> 7
list.pop() //=> 0
list.pop() //=> undefined