writeStream.cursorTo(x[, y][, callback])
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x<number>
- 
y<number>
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callback<Function> 操作完成后调用。¥ callback<Function> Invoked once the operation completes.
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返回:<boolean> false如果流希望调用代码在继续写入附加数据之前等待'drain'事件触发;否则true。¥Returns: <boolean> falseif the stream wishes for the calling code to wait for the'drain'event to be emitted before continuing to write additional data; otherwisetrue.
writeStream.cursorTo() 将此 WriteStream 的光标移动到指定位置。
¥writeStream.cursorTo() moves this WriteStream's cursor to the specified
position.