swift - 如何根据字符串的出现次数对数组进行排序？

Question

如何根据字符串出现的次数对数组进行排序

例子: var array = ["你好","我","那个","我","你好","我","as","the"]

排序后的数组应该是这样的

[“我”，“你好”，“那个”，“作为”，“那个”]

Answer 1

针对 Swift 3 进行了更新

var array = ["Hello","Me","That","Me","Hello","Me","as","the"]

            var counts:[String:Int] = [:]

            for item in array {
                counts[item] = (counts[item] ?? 0) + 1
            }
            print(counts)

            let result = counts.sorted { $0.value > $1.value }.map { $0.key }
            print(result)

            array.removeAll()
            for string in result {
                array.append(string)
            }
            print(array)