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rows compare

Hi,

I need to know how to compare my new row with entire grid because, i shoulldn't insert repeated records...

The most simple way - compare by ID.
Each row in grid must have unique ID , and you can check if row with such ID already exists by
    if(grid.getRowById("someID")) alert("alredy exists");

The less reliable way - compare by cell value

    if (grid.findCell(value,INDEX).length) alert("cell with such value already exists");

where
    value - cell value
    INDEX - column