// doesn't have to be Comparable, just conforming to Equatable is fine, as you are only using "==" extension Dictionary where Key: Equatable, Value: Equatable { func sortedKeysByValue(byComparingValues compareValues: (Value, Value) -> Bool, andComparingKeys compareKeys: (Key, Key) -> B...
是否有-(NSArray *)keysSortedByValueUsingSelector:(SEL)comparator的类似物?如何在不强制转换为NSDictionary的情况下执行此操作?我试过了,但这似乎不是一个好的解决方案。var values = Array(dict.values) values.sort({ $0 > $1 })for number in values {...
Example 1: Swift dictionary sorted() var info = ["Carlos": 1999, "Nelson": 1987] // sort dictionary by key in ascending order let sortInfo = info.sorted(by: > ) print(sortInfo) Output [(key: "Nelson", value: 1987), (key: "Carlos", value: 1999)] Here, we can see that the...
public struct Dictionary<Key : Hashable, Value> : CollectionType, DictionaryLiteralConvertible 1. 2. 3. 它是基于哈希表从key到value实例的映射,它的键值是无序的。要求key是遵守Hashable的。 其正规语法应该是:Dictonary<key, value>。 创建空字典(Creating An Empty Dictionary) // 创建空字典 var emptyDic...
startIndex:DictionaryIndex<String, String>(_value: Swift.DictionaryIndexRepresentation<Swift.String, Swift.String>._native(Swift._NativeDictionaryIndex<Swift.String, Swift.String>(nativeStorage: , offset: 1))) endIndex:DictionaryIndex<String, String>(_value: Swift.DictionaryIndexRepresentation<Swift.Stri...
Swift提供了三种基本集合类型,数组(array)、集合(set)和字典(dictionary)。数组是一组按序排列的数据,集合是一组各不相同的无序数据,字典是一组与关键值相关联的无序数据。参见下图。 3.1集合的可变性Mutability of Collections 与前面的字符串一样,赋值给变量的集合是可变的,赋值给常量的是不可变的。如果创建一个...
按值排序字典[Key:[Key:Value]]Swift swift sorting dictionary 我有一个口述,看起来像这样:var dict = [Int: [String: Any]]() dict[1] = ["nausea": 23, "other": "hhh"] dict[2] = ["nausea": 3, "other": "kkk"] dict[3] = ["nausea": 33, "other" : "yyy"] ...
XCODE 8•SWIFT3 let fruitsDict = ["apple": 5, "pear": 9, "grape": 1] let fruitsTupleArray = fruitsDict.sorted{ $0.value > $1.value } fruitsTupleArray // [(.0 "pear", .1 9), (.0 "apple", .1 5), (.0 "grape", .1 1)] for (fruit,votes) in fruitsTupleArray { ...
Swift Program to sort the Dictionary - This tutorial will discuss how to write swift program to sort a Dictionary. A dictionary is used to store data in the form of key-value pair in the collation without any defined-order. Here the type of the keys are