javascript-基础（六）

作业内容：自选不少于5个字符串和数组的api实例演示,特别是数组遍历方法

        //字符串
        str = '佐罗，好好学习天天向上'
        console.log(...str)
        for(i=0;i<str.length-1;i++){
            console.log(str[i])
        }
        //类数组
        str2={
            0:'e',
            1:'好',
            2:'好',
            3:'学',
            4:'习',
            length:5
        }
        //整体转成数组遍历
        console.log(Array.of(str))
        console.log(Array.of(...str))
        //子集转为数组遍历
        console.log(Array.from(str))
        console.log(Array.from(str2))
        console.log(Array.of(str2))
        console.log(str2)

        // 遍历数组
        // 1.forEach
        // 2.map(有返回值)
        arr2=[1,2,3,4,5,6,7,8,9,0]
        console.log(...arr2)
        res1 = arr2.forEach(element => console.log(element));
        //console.log(res1)
        res2 = arr2.map(element => console.log(element));
        res2 = arr2.map(element => [element]);