如何合并两个不同的对象数组，并同时返回匹配和不匹配的项？

function mergeArrays(arr1, arr2) {
  var matches = [];
  var mismatches = [];

  arr1.forEach(function(obj1) {
    var foundMatch = false;

    for (var i = 0; i < arr2.length; i++) {
      var obj2 = arr2[i];

      // 判断两个对象是否匹配，这里假设对象有一个属性叫做'id'
      if (obj1.id === obj2.id) {
        matches.push(obj2);
        arr2.splice(i, 1); // 从第二个数组中移除匹配项
        foundMatch = true;
        break;
      }
    }

    if (!foundMatch) {
      mismatches.push(obj1);
    }
  });

  mismatches = mismatches.concat(arr2); // 将第二个数组中剩余的项添加到不匹配数组中

  return {
    matches: matches,
    mismatches: mismatches
  };
}

// 示例用法
var array1 = [{id: 1, name: 'A'}, {id: 2, name: 'B'}, {id: 3, name: 'C'}];
var array2 = [{id: 2, name: 'B'}, {id: 4, name: 'D'}, {id: 5, name: 'E'}];

var result = mergeArrays(array1, array2);
console.log(result.matches); // 输出: [{id: 2, name: 'B'}]
console.log(result.mismatches); // 输出: [{id: 1, name: 'A'}, {id: 3, name: 'C'}, {id: 4, name: 'D'}, {id: 5, name: 'E'}]