數組截斷算法（JavaScript）

問題：

返回一個數組被截斷n個元素後還剩餘的元素，從索引0開始截斷。

解答：

function slasher(arr, howMany) {
// it doesn't always pay to be first
    var arrLength = arr.length;
    var spliceLength = arrLength - howMany;
    var spliceArr;
    
    spliceArr = arr.splice(howMany, spliceLength);
    
    return spliceArr;

}

slasher([1, 2, 3], 2);

連接：

https://www.w3cschool.cn/code...