如何排序元组数组（String，String，int）

Question

我有一系列元组。我想按元组的第一个元素对列表进行排序。

示例：

var names = [("C","MTS",4),("A","MTS",3),("M","SMTS",1),("N","LEAD",5)];

我想通过元组的第一个元素按以下顺序对它们进行排序

[("A","MTS",3),("C","MTS",4),("M","SMTS",1),("N","LEAD",5)];

请建议。

Answer 1

试试这个：

var names = [("C","MTS",4),("A","MTS",3),("M","SMTS",1),("N","LEAD",5)]
names.sortInPlace{ $0.0 < $1.0 }

// You can use this if it more clearly:
// names.sortInPlace { (name1: (String, String, Int), name2: (String, String, Int)) -> Bool in
       // return name1.0 < name2.0
//}

print(names)
//[("A", "MTS", 3), ("C", "MTS", 4), ("M", "SMTS", 1), ("N", "LEAD", 5)]