将一个数组与另一个数组进行比较并添加一个计数器

function compareArrays(targetArray, compareArray) {
  let counter = 0;

  for (let i = 0; i < targetArray.length; i++) {
    for (let j = 0; j < compareArray.length; j++) {
      if (targetArray[i] === compareArray[j]) {
        counter++;
        break;
      }
    }
  }

  return counter;
}

// 示例用法
const targetArray = [1, 2, 3, 4, 5];
const compareArray = [3, 4, 5, 6, 7];

const result = compareArrays(targetArray, compareArray);
console.log(result); // 输出：3