constoriginalArray =[1,2,3,4,5]; constdoubledArray = originalArray.map((num) =>num *2); console.log(doubledArray);// 出力:[2, 4, 6, 8, 10]a
constoriginalArray =[1,2,3,4,5]; constdoubledArray = originalArray.map((num) =>num *2); console.log(doubledArray);// 出力:[2, 4, 6, 8, 10]a