JS搜索数组中的值

function searchArray(array, target) {
  for (let i = 0; i < array.length; i++) {
    if (array[i] === target) {
      return i; // 返回匹配值的索引
    }
  }
  return -1; // 没有找到匹配值
}

const array = [1, 2, 3, 4, 5];
const target = 3;
const index = array.indexOf(target);
console.log(index); // 输出: 2

const array = [1, 2, 3, 4, 5];
const target = 3;
const isFound = array.includes(target);
console.log(isFound); // 输出: true

const array = [1, 2, 3, 4, 5];
const target = 3;
const found = array.find(element => element === target);
console.log(found); // 输出: 3

const array = [1, 2, 3, 4, 5];
const target = 3;
const foundArray = array.filter(element => element === target);
console.log(foundArray); // 输出: [3]