javascript - 使用 Angular js 从 json 数组中删除重复值

Question

我想从以下 json 数组中删除重复项

$scope.array = [
    {"name":"aaa","key":"1"},
    {"name":"bbb","key":"2"},
    {"name":"aaa","key":"1"},
    {"name":"ccc","key":"3"},
    {"name":"bbb","key":"2"}
];

我尝试了以下代码，但它不起作用

var ids = {};

$scope.array.forEach(function (list) {
    ids[list.name] = (ids[list.name] || 0) + 1;
});

var finalResult = [];
$scope.array.forEach(function (list) {
    if (ids[list.name] === 1) finalResult.push(student);
});

console.log(finalResult);

这是预期的结果。

$scope.array = [
    {"name":"aaa","key":"1"},
    {"name":"bbb","key":"2"} ,
    {"name":"ccc","key":"3"} 
];

Answer 1

您可以使用 Array#filter 执行类似的操作

$scope = {};
$scope.array = [{
  "name": "aaa",
  "key": "1"
}, {
  "name": "bbb",
  "key": "2"
}, {
  "name": "aaa",
  "key": "1"
}, {
  "name": "ccc",
  "key": "3"
}, {
  "name": "bbb",
  "key": "2"
}];

var ids = {};

$scope.array = $scope.array.filter(function(v) {
  var ind = v.name + '_' + v.key;
  if (!ids[ind]) {
    ids[ind] = true;
    return true;
  }
  return false;
});
console.log($scope.array);