js二维数组

1     function isMultiArr(arr){
2           return arr.every(function(element){
3                 return element instanceof Array && element.length == 2;
4             })
5      }

 1 function getIndex(ele,map){
 2                 var res=[];
 3                 for(let i=0;i<map.length;i++){
 4                     for(let j=0;j<map[i].length;j++){
 5                         if(map[i][j] == ele){
 6                             res = [i,j];
 7                         }
 8                     }
 9                 }
10                 return res;            
11             }

1 //数组插入元素
2             Array.prototype.insert = function(index,ele){
3                 this.splice(index,0,ele);
4             }

1     var hasAttr = function(ele,property){
2                  return    ele.attr(property) !== undefined ? true : false;
3             }