Int>.Keys. While I could create a helper function that generates an array of keys from a dictionary and then iterate through it, I am wondering if there is a more elegant or built-in solution available. Can I potentially extendDictionaryto conform toRandomAccessCollection?
前言:Array、Map和Set都属于iterable类型1、Map是一组键值对的解构,具有极快的查找速度 var m = new Map([['Michael', 95], ['Bob', 75], ['Tracy', 85]]); m.get('Michael'); // 95 初始化Map需要一个二维数组,或者直接初始化一个空Map。Map具有以下方法: var m = new M ...