javascript - How can I rearrange an array to be ordered after a tile is dragged and dropped? -


i have array of tiles start off in following position: 

<div gridster>     <ul>         <li gridster-item="item" ng-repeat="item in standarditems"></li>     </ul> </div>  $scope.standarditems = [   { sizex: 2, sizey: 1, row: 0, col: 0 },   { sizex: 2, sizey: 2, row: 0, col: 2 },   { sizex: 1, sizey: 1, row: 0, col: 4 },   { sizex: 1, sizey: 1, row: 0, col: 5 },   { sizex: 2, sizey: 1, row: 1, col: 0 },   { sizex: 1, sizey: 1, row: 1, col: 4 },   { sizex: 1, sizey: 2, row: 1, col: 5 },   { sizex: 1, sizey: 1, row: 2, col: 0 },   { sizex: 2, sizey: 1, row: 2, col: 1 },   { sizex: 1, sizey: 1, row: 2, col: 3 },   { sizex: 1, sizey: 1, row: 2, col: 4 } ];

as gridster layout, 1 "item" can dragged , dropped new located.

problem: how can create array ordered layout position? topmost left tile index 0, , bottom-most right tile last indexed item everytime layout reshuffled?

plunkr


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