Array.from()和Array.of()

1  var obj = {
2             0: ‘a‘,
3             1: ‘b‘,
4             2: ‘c‘,
5             length: 3
6         }
7     var arr = Array.from(obj,function(item,index){    
8             return item + index
9  　　})

 1 <div>1</div>
 2 <div>2</div>
 3 <div>3</div>
 4 <div>4</div>
 5 <div>5</div>
 6 
 7 我们要获取多个div里的值，通过Array.from()就可以获取到innerHTML
 8 
 9 var divs = document.getElementsByTagName(‘div‘)
10         var divTexts = Array.from(divs,function(item,index){
11             return item.innerHTML
12 })

1 var arr = Array.of(6)
2         function arrayOf(){
3             return 
4 }