【原生】jsは配列に別の配列が含まれているかどうかをどのように判断します
252 ワード
let a = [1, 2, 3, 4, 5, 6, 7, 8];
let b = [1, 2];
let c = [3, 9];
function includes(arr1, arr2) {
return arr2.every(val => arr1.includes(val));
}
console.log(includes(a, b)); //true
console.log(includes(a, c)); //false