ES6字符串的解构赋值

<script>
    //1.字符串的结构赋值
    var str='i am robot ha ha ha'
    var [a,b,c,...oth]=str //a=i;b=an;c=robot oth=后面的每个字符，包括空格
    var [...str1]=str
    var str2=str.split('')
    var str3=[...str]// str1==str2==str3==oth true
    //2.提取属性
    var {length,split}=str 
    console.log(length);
    console.log(split.call('1,2,3',','));

</script>