javascript - 如何按键对ng-options中的数组进行排序？

Question

有这样的数组：

month: Array[13]0: "M"1: "January"2: "February"3: "March"4: "April"5: "May"6: "June"7: "July"8: "August"9: "September"10: "October"11: "November"12: "December"

我愿意：

ng-options="key as value for (key, value) in data.month | orderBy:key"

但我得到未排序的选择列表。

Answer 1

为了使用带有过滤器的跟踪，请使用track by.

标记

ng-options="key as value for (key, value) in data.month | orderBy:'key' track by key"

更新

这orderBy永远不会起作用，因为您有文字数组。您需要将此数组转换为类似 JSON 的对象，该对象的结构类似于[{id: 0, value: "M"}, {id: 1, value: "January"},......]

HTML

ng-options="item.id as item.value for items in data.month | orderBy:'id'"

演示 Plunkr

Answer 2

你缺少两个'。这部分，orderBy: key应该是orderBy:'key'

尝试这个：

ng-options="key as value for (key, value) in data.month | orderBy: 'key'"

Answer 3

要解决此问题，需要重新格式化ng-option，如：

day.id as day.value for day in data.month

数组data.month将是告诉用户的方式pankajparkar