小编Sop*_*lex的帖子

我想转换这样的对象:

{"1":5,"2":7,"3":0,"4":0,"5":0,"6":0,"7":0,"8":0,"9":0,"10":0,"11":0,"12":0}

成为一组键值对,如下所示:

[[1,5],[2,7],[3,0],[4,0]...].

如何在JavaScript中将对象转换为键值对数组？

我需要知道一个元素是否在数组中两次或多次.

var arr = [elm1,elm2,elm3,elm3,elm4,elm5,elm5,elm5,elm6,elm7] ;
if(elm is in array by many time ){
      // do some code with this element
}else{
      // other stuff ;;
}

有什么建议 ？