<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title></title> <script type="text/javascript"> var arr = [ { group:"user", id:"2642ba0e_20da_fd20_7a99_97faebde4c57", title:"lisaWeb", tooltip:"", }, { group:"department", id:"2642ba0e_20da_fd20_7a99_97faebde4c57", title:"lisaWeb", tooltip:"", }, { group:"user", id:"2642ba0e_20da_fd20_7a99_97faebde4c57", title:"lisaWeb", tooltip:"", }, { group:"user", id:"2642ba0e_20da_fd20_7a99_97faebde4c57", title:"lisaWeb", tooltip:"", }, ]; var json = { 'user':0, 'department':0, 'label':0, 'post':0 } for(var i = 0 ; i < arr.length; i++){ for(key in json){ if(arr[i].group == key){ json[key]++ } } } console.log(json);//{user: 3, department: 1, label: 0, post: 0} </script> </head> <body> </body> </html>
【js】统计数组中某些项的个数
猜你喜欢
转载自www.cnblogs.com/websmile/p/9437958.html
今日推荐
周排行