js pub 自定义公共函数

参考 https://www.cnblogs.com/guoyeqiang/p/8178336.html

 function array_column(arr, column) {
      return arr.map(v => v[column])
    }
    
   //过滤重复
    function rmRepeat(arr,str){
         var newArr = [];
         for(var i=0 ; i<arr.length; i++){
             let v = arr[i].replace(str,'');
             if(newArr.indexOf(v) == -1){
                 newArr.push(v);
             }

         }
         return newArr;
     }
//排序
    function sortBy(attr, rev) {
        //第二个参数没有传递 默认升序排列
        if (rev == undefined) {
            rev = 1;
        } else {
            rev = (rev) ? 1 : -1;
        }

        return function (a, b) {
            a = a[attr];
            b = b[attr];
            if (a < b) {
                return rev * -1;
            }
            if (a > b) {
                return rev * 1;
            }
            return 0;
        }
    }

二维数组删除重复