ES6 map方法与filter方法

map 方法：可以简单的理解为映射

var num = [1,2,3,4];
var dataAdd = num.map(n => n+n);
var datadeep = num.map(n => n-1);
console.log(dataAdd);//[2, 4, 6, 8]
console.log(datadeep);//[0,1,2,3]

filter方法: 过滤筛选的作用，数组filter后，返回的结果为新的数组

		var chinaWords = [{
			name:"君住长江头",
			msg:"诗词",
			age:15
		},{
			name:"我住长江尾",
			msg:"歌赋",
			age:15
		},{
			name:"日日思君不见君,同饮一江水",
			msg:"古风",
			age:14
		}]
		
		var dataname = chinaWords.map(one => one.name)
		console.log(dataname.join(','));//君住长江头,我住长江尾,日日思君不见君,同饮一江水
		
		var oneages = chinaWords.map(one => one.age)
		console.log(oneages.join(','));//15,15,14
		var ageJudge = oneages.filter(age => age > 14 )
		console.log(ageJudge.join(','));//15,15