Unable to find number of rows in table using Xpath - selenium

Question

When i am trying to find number of tr(class-tr-heading) in the 1st table,i am getting 2 tr as a result if i use Xpath(working fine with CSS Selector-returns 1 tr)
<div class="large 20 columns">
<table class="Red"><tbody>
<tr class="tr-heading"></tr>
<tr></tr>
</tbody></table>
<table class="Red"><tbody>
<tr class="tr-heading"></tr>
<tr></tr>
</tbody></table>
</div>
Below one return two tr,
WebElement tbl=dr.findElement(By.xpath("//div[#class='large 20 columns']/table[1]/tbody"));
List<WebElement> trs=tbl.findElements(By.xpath("//tr[#class='tr-heading']"));
System.out.println(trs.size());
This below code returns single tr,
WebElement tbl=dr.findElement(By.xpath("//div[#class='large 20 columns']/table[1]/tbody"));
List<WebElement> trs1=tbl.findElements(By.cssSelector("tr[class='tr-heading']"));
System.out.println(trs1.size());
It seems Xpath is taking the whole div and returns two tr.Can you please tell me why this difference is and how do i have to do using xpath.

Answer 1

Use dot(.)as it Selects the current node
WebElement tbl=dr.findElement(By.xpath("//div[#class='large 20 columns']/table[1]/tbody"));
List<WebElement> trs=tbl.findElements(By.xpath(".//tr[#class='tr-heading']"));
System.out.println(trs.size());
//Now it will print out 1 as in the current node there is only one tr tagwith the specified class name