获取对角线td jquery的计数 [英] get count of diagonal td jquery

问题描述

我如何使用jquery选择器选择所有对角线单元格(td)，假设我有一个nxn表，并且我想分别选择``/''和``\''对角线单元格.

像这样的东西

函数getLDCount()
{
返回$(#mytable td")....... length
}

函数getRDCount()
{
返回$(#mytable td").......... length
}

how can i select all diagonal cells(td) using jquery selector , suppose i have a nxn table and i want to select both ''/'' and ''\'' diagonals cells separately.

some thing like this

function getLDCount()
{
return $("#mytable td").......length
}

function getRDCount()
{
return $("#mytable td")..........length
}

推荐答案

(#mytable td")....... length
}

函数getRDCount()
{
return

("#mytable td").......length
}

function getRDCount()
{
return

(#mytable td")..... length
}

("#mytable td")..........length
}

由于表为N x N-长度显然为N.要获得对角线单元，以下逻辑将起作用:

从左到右:

您只需要索引等于行索引的单元格

从右到左:

这比从左到右有点累.以下等式将为您提供所需的单元格:= N-1-Row< index>

这是相同的jsfiddle！

http://jsfiddle.net/kFP4D/ [ ^ ]

希望这会有所帮助！

As the table is N x N - the length is obviously going to be N. To get the diagonal cells, the following logic would work:

Left to right:

You just need the cell whose index is equal to the row index

Right to left:

This is a bit involved than left to right. The following equation would get you the required cells:= N - 1 - Row<index>

Here is a jsfiddle for the same!

http://jsfiddle.net/kFP4D/[^]

Hope this helps!

这篇关于获取对角线td jquery的计数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！