forked from ygs-code/vue
-
Notifications
You must be signed in to change notification settings - Fork 1
/
array.html
84 lines (79 loc) · 1.81 KB
/
array.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script >
var obj={
arr:[
{
arr_1:[
{a:1},
{a:2},
{a:3},
{a:4},
{a:5},
]
},
{
arr_1:[
{a:11},
{a:12},
{a:13},
{a:14},
{a:15},
]
},
{
arr_1:[
{a:21},
{a:22},
{a:23},
{a:24},
{a:25},
]
},
{
arr_1:[
{a:31},
{a:32},
{a:33},
{a:34},
{a:35},
]
},
{
arr_1:[
{a:41},
{a:42},
{a:43},
{a:44},
{a:45},
]
},
{
arr_1:[
{a:51},
{a:52},
{a:53},
{a:54},
{a:55},
]
},
]
}
let newArr=obj.arr.map(item=>{
let arr= item.arr_1.map(_item=>{
return _item.a;
})
return arr.join(',')
})
console.log(newArr.join(',').split(','))
var arr1=[1,2,3,4,5];
arr1.length=3;
console.log(arr1)
</script>
</body>
</html>