Question

很抱歉，如果以前有人问过这个问题，但我想根据另一个数组的标准对javascript数组进行排序。我知道criteria数组中包含的所有值都将在某个地方的较大数组中，但是我需要将criteria数组中的值移到列表顶部。

例如，我有一个更大的数组，看起来像这样：

array = [
  {_id: "123", username: "username1",platform: "xbox"},
  {_id: "124", username: "username2",platform: "xbox"},
  {_id: "125", username: "username3",platform: "ps4"},
  {_id: "126", username: "username4",platform: "pc"},
  {_id: "127", username: "username5",platform: "ps4"},
  {_id: "128", username: "username6",platform: "pc"}
    ];

然后我需要根据较小数组的标准对较大数组进行排序，然后将这些值移至较大数组的顶部

因此，在这种情况下，条件数组将为

critarray = [
 {_id: "124", username: "username2",platform: "xbox"},
 {_id: "127", username: "username5",platform: "ps4"},
 {_id: "128", username: "username6",platform: "pc"},
];

较大的数组将按以下顺序排序：

array = [
  {_id: "124", username: "username2",platform: "xbox"},
  {_id: "127", username: "username5",platform: "ps4"},
  {_id: "128", username: "username6",platform: "pc"},
  {_id: "123", username: "username1",platform: "xbox"},
  {_id: "125", username: "username3",platform: "ps4"},
  {_id: "126", username: "username4",platform: "pc"},
    ];

只要条件数组中的所有对象都移到顶部，顺序也不重要。

任何帮助将不胜感激！

谢谢

Answer 1

过滤并合并

由于您除了关心这两个组之外的其他顺序之外，而且您知道较大的数组具有较小数组中的所有元素，而不是进行排序，因此可以将所有critarray个项目从{{ 1}}而非串联array和critarray：

array

这假设let array = [ {_id: "123", username: "username1",platform: "xbox"}, {_id: "124", username: "username2",platform: "xbox"}, {_id: "125", username: "username3",platform: "ps4"}, {_id: "126", username: "username4",platform: "pc"}, {_id: "127", username: "username5",platform: "ps4"}, {_id: "128", username: "username6",platform: "pc"} ]; let critarray = [ {_id: "124", username: "username2",platform: "xbox"}, {_id: "127", username: "username5",platform: "ps4"}, {_id: "128", username: "username6",platform: "pc"}, ]; // all items not in crit array let arrayFiltered = array.filter(item => !critarray.find(i => i._id === item._id) ) // concat critarray first, then rest let newArr = critarray.concat(arrayFiltered) console.log(newArr)是唯一标识符。

或排序

或者，您也可以从_id中创建一个Set的ID，如果要对数组进行排序，则可以使用该集合中的包含作为排序的基础：

citarray

用另一个数组对较大的javascript数组进行排序，然后将值移到该数组的顶部

1 个答案: