[Solved] How can i find some position near a position?

by 


    var startPoint = {x:5,y:-26};
    var endPoint = {x:13,y:-34};
    var map=[];
    for (i=startPoint.x;i<=endPoint.x;i++) {
        for(j=startPoint.y;j>=endPoint.y;j--) {
            map[i,j] = {x:i,y:j};
        }
    }

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solved How can i find some position near a position?