Question

我想对数组进行排序

像这样：

let elements = ["S","A","C","C","T","E","E","E","F","S","S","A","A","C"]

我试过这个

var currentElement = ""
var newElements:[String] = []
for element in elements {
    if currentElement != element{
        currentElement = element
        newElements.append(element)
    }
}

但是print["S", "A", "C", "T", "E", "F", "S", "A", "C"]

如何将其排序为["A","C","E","F","S","T"]

Answer 1

let elements = ["S","A","C","C","T","E","E","E","F","S","S","A","A","C"]

let sortedElements = elements.sorted(by: {$0 < $1})

print(sortedElements)

打印：

["A", "A", "A", "C", "C", "C", "E", "E", "E", "F", "S", "S", "S", "T"]

Answer 2

你想要做的是删除重复项，然后对其进行排序，对吗？

您可以将其转换为Set，然后拨打sorted()：

let elements = ["S","A","C","C","T","E","E","E","F","S","S","A","A","C"]
let newElements = Set(elements).sorted() // ["A", "C", "E", "F", "S", "T"]

Answer 3

你应该使用ComparisonResult按字母顺序对数组进行排序，因为Set（elements）.sorted（）并且你有小写字符，sort的结果将是错误的。

var elements = ["S","A","C","C","T","E","E","E","F","S","S","A","A","C"]

elements = elements.sorted { $0.localizedCaseInsensitiveCompare($1) == ComparisonResult.orderedAscending }

//the output["A", "A", "A", "C", "C", "C", "E", "E", "E", "F", "S", "S", "S", "T"]

Swift排序一个数组

3 个答案: