辞書の入った配列で辞書のキーAの値で抜き出してキーBの値でソートしたい。

swift
1var dicArray:[[String:Any]]  = [["name":"田中","age":45,"height":167],
2                                ["name":"佐藤","age":44,"height":180],
3                                ["name":"鈴木","age":44,"height":177],
4                                ["name":"高橋","age":45,"height":169],
5                                ["name":"黒田","age":44,"height":172],
6                                ["name":"山本","age":44,"height":179]]

このような配列を用意して、この中からageが44の辞書を取り出してheightの順で並べ替えて下記のようしたいです。

swift
1var dicArray:[[String:Any]]  = [["name":"黒田","age":44,"height":172],
2                                ["name":"鈴木","age":44,"height":177],
3                                ["name":"山本","age":44,"height":179],
4                                ["name":"佐藤","age":44,"height":180]]

抜き出しは下記のような感じで考えたのですが、

swift
1var dicArrayB:[[String:Any]] = [[:]]
2
3for i in 0...dicArray.count - 1 {
4    let dic = dicArray[i]
5    
6    if dic["age"] as! Int == 44 {
7        dicArrayB.append(dic)
8    }
9}

並べ替えの方法がわかりません。
よろしくおねがいします。

行動規範の内容に同意します

回答1件

ベストアンサー

filter と sorted を使って、配列から要素の抽出とソートをおこなうことができます。

let dicArray: [[String:Any]] = [
	["name":"田中","age":45,"height":167],
	["name":"佐藤","age":44,"height":180],
	["name":"鈴木","age":44,"height":177],
	["name":"高橋","age":45,"height":169],
	["name":"黒田","age":44,"height":172],
	["name":"山本","age":44,"height":179]
]

let result = dicArray.filter { (e) -> Bool in
	return (e["age"] as! Int) == 44
}.sorted { (x, y) -> Bool in
	return (x["height"] as! Int) < (y["height"] as! Int)
}

下記のような結果を得ることができます。

[
  ["name": "黒田", "height": 172, "age": 44], 
  ["name": "鈴木", "height": 177, "age": 44], 
  ["age": 44, "name": "山本", "height": 179], 
  ["height": 180, "name": "佐藤", "age": 44]
]

また、辞書の内容がある程度決まっているようでしたら、型を使ってよりシンプルに記述することができます。

struct User {
  let name: String
  let age: Int
  let height: Int
}

let dicArray: [User] = [
  User(name: "田中", age: 45, height: 167),
  User(name: "佐藤", age: 44, height: 180),
  User(name: "鈴木", age: 44, height: 177),
  User(name: "高橋", age: 45, height: 169),
  User(name: "黒田", age: 44, height: 172),
  User(name: "山本", age: 44, height: 179)
]

let result = dicArray.filter({ $0.age == 44 }).sorted(by: { $0.height < $1.height })
print("(result)")