根据 Swift 中的给定索引对数组重新排序

Question

let waypointOrder = [1,0,2,3]
var waypoints = ["sydny", "wynard", "surry hills", "Town hall"]

我希望 waypoints 像这样排序：

["Wynard", "sydny", "surry hills", "Town hall"] 

解释：因为 waypointOrder[0] = 1 然后 orderedWaypoints[0] = waypoints[1]，如果这有意义...

嗯，Google 距离 API 响应返回我的 waypoint_order。 我想根据 google 距离响应重新排序我的航路点。

不胜感激

Answer 1

在排序数组上使用 map 函数，并使用它的 returned 值到 return 您要排序的数组中它的索引处的值。

let waypointOrdering = [1,0,2,3]
var waypoints = ["sydny","wynard","surry hills","Town hall"]
let orderedWaypoints = waypointOrdering.map { waypoints[[=10=]] }

输出：

["wynard", "sydny", "surry hills", "Town hall"]