swift3.0 字典的基本用法

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自学swift3.0，如果有什么错误或建议的话欢迎吐槽哦~

        //1.字典的定义使用[key:value,key:value]快速定义        let dic:[String:Any] = ["name":"张三","age":22]        print(dic)                //数组字典        let arrDic:[[String:Any]] = [            ["name":"张三","age":22],            ["name":"李四","age":24]        ]        print(arrDic)        //2.可变字典的增删改查        var dictionary:[String:Any] = ["name":"张三","age":22]        print(dictionary)                /*         key存在则为修改，key不存在 则为添加         */        //增加键值对        dictionary["score"] = 99        print(dictionary)                //修改键值对        dictionary["age"] = 33        print(dictionary)                //删除键值对        // ps: 字典是通过KEY来定位值的，所有的KEY必须是可以 hash/哈希 的 (md5就是一种哈希，哈希就是将字符串变成唯一的整数，便于查找，能够提高字典遍历的速度)//        dictionary.removeValue(forKey: <#T##Hashable#>)                dictionary.removeValue(forKey: "score")        print(dictionary)                //字典遍历        //写法一        for e in dictionary {            print("key = \(e.key)   value = \(e.value)")                    }                //写法二        for (key,value) in dictionary {            print("key = \(key)   value = \(value)")        }                //字典合并        var dic1 = ["name":"小明","score":"88"]        print(dic1)        let dic2 = ["teacher":"老大"]                for (key,value) in dic2 {            dic1[key] = value        }        print(dic1)

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