[js] jQuery 셀 병합

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#중복된 셀을 병합해주는 js

#HTML

<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
  <meta charset="utf-8">
  <title>table rowspan with jQuery</title>
</head>
<body>
  <h1>원하는 row 중복데이터 셀병합</h1>
<table id="forRowspan">
  <thead>
    <tr>
      <th>제목</th>
      <th>제목</th>
      <th>제목</th>
      <th>제목</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>1</td>
      <td>2</td>
      <td>3</td>
      <td>4</td>
    </tr>
    <tr>
      <td>a</td>
      <td>b</td>
      <td>c</td>
      <td>d</td>
    </tr>
    <tr>
      <td>a</td>
      <td>2</td>
      <td>3</td>
      <td>d</td>
    </tr>
    <tr>
      <td>1</td>
      <td>2</td>
      <td>c</td>
      <td>4</td>
    </tr>
    <tr>
      <td>1</td>
      <td>2</td>
      <td>c</td>
      <td>a</td>
    </tr>
  </tbody>
</table>
  <p>License : MIT (shj at xenosi.de)</p>
</body>
</html>

#CSS

#forRowspan {
  border-collapse:collapse;
  border:1px solid black;
}

#forRowspan th, #forRowspan td {
  border:1px solid gray;
}

#JS

$(function(){
	$('#forRowspan').each(function() {
		var table = this;
		$.each([2,3,4] /* 합칠 칸 번호 */, function(c, v) {
			var tds = $('>tbody>tr>td:nth-child(' + v + ')', table).toArray();
            var i = 0, j = 0;
			for(j = 1; j < tds.length; j ++) {
				if(tds[i].innerHTML != tds[j].innerHTML) {
					$(tds[i]).attr('rowspan', j - i);
					i = j;
					continue;
				}
				$(tds[j]).hide();
			}
			j --;
			if(tds[i].innerHTML == tds[j].innerHTML) {
				$(tds[i]).attr('rowspan', j - i + 1);
			}
		});
	});
});

#Output