判斷並回傳布林值, every()、some()、includes()、Array. ... 加到第5,6,7 個位置) let c = [1,2,3,4,5,6,7,8]; c.splice(5,0,100); console.log(c); // [1, 2, 3, 4, ...
確定！ 回上一頁
