Question

说我有这样的对象

$scope.products = {
 blueDuck: {type:'duck', price: 5},
 redDuck: {type:'duck', price: 8},
 greenWolverine: {type:'wolverine', price:15}
}

我想按类型遍历元素：

angular.forEach($scope.products, function(key, value) {
   console.log(value.type);
});

那会输出：

duck
duck
wolverine

当我想得到一个类似的变量时：

duck
wolverine

Answer 1

 var items = []; //The temporary array to keep the values
 angular.forEach($scope.products, function(key,value) {
     if(items.indexOf(value) === -1) { //Check if the values is not already in the temp array
         items.push(key); //Push it to array
     }
 });
console.log(items); //Show the content of the array

Answer 2

您可以将来自循环的变量存储在array中，并检查该数组是否包含loop中的数据。这是我想出的东西

 var items = [];
 angular.forEach($scope.products, function(key,value) {
          if(items.indexOf(value) === -1) {
              items.push(key);
              console.log(value.type);
          }
      });

AngularJS为每个选择不同

2 个答案: