如何找出两个JavaScript对象数组之间的差异？

function findArrayDifferences(array1, array2) {
  var differences = [];
  
  for(var i = 0; i < array1.length; i++) {
    var obj1 = array1[i];
    var found = false;

    for(var j = 0; j < array2.length; j++) {
      var obj2 = array2[j];

      if (compareObjects(obj1, obj2)) {
        found = true;
        break;
      }
    }
    
    if (!found) {
      differences.push(obj1);
    }
  }

  return differences;
}

function compareObjects(obj1, obj2) {
  for(var prop in obj1) {
    if (obj1.hasOwnProperty(prop)) {
      if (obj1[prop] !== obj2[prop]) {
        return false;
      }
    }
  }
  return true;
}

// 示例用法
var array1 = [
  { id: 1, name: 'John' },
  { id: 2, name: 'Jane' },
  { id: 3, name: 'Smith' }
];

var array2 = [
  { id: 1, name: 'John' },
  { id: 2, name: 'Jane' },
  { id: 4, name: 'David' }
];

var differences = findArrayDifferences(array1, array2);
console.log(differences);