你如何使用xy coords跟踪DRY代码？

Question

您将如何以您选择的语言在此示例中获得梦想的DRY理想:

drawLine(Point(0, 0), Point(w, 0));
int curRowY = 0;
for(int row=0; row<rowHeights.size(); row++) {
    curRowY += rowHeights[row];
    drawLine(Point(0, curRowY), Point(w, curRowY));
}

drawLine(Point(0, 0), Point(0, h));
int curColX = 0;
for(int col=0; col<colWidths.size(); col++) {
    curColX += colWidths[col];
    drawLine(Point(curColX, 0), Point(curColX, h));
}

注意:大量的ad-hoc预处理器宏可能会极其不易读写,因此无法读取.

Answer 1

答案很简单:矢量.例如

repeatLines(Point start, Point end, Vector direction, int[] gaps)
    {
    drawLine(start, end);
    for (int i = 0; i < gaps.Length; i++)
        {
        Vector vector = direction * gaps[i];
        start += vector;
        end += vector;
        drawLine(start, end);
        }
    }

repeatLines(Point(0, 0), Point(0, w), Vector(1, 0), rowHeights);
repeatLines(Point(0, 0), Point(h, 0), Vector(0, 1), colWidths);