如何在第n次出现时将TD字符串拆分为新行

Question

下面的代码将每行的文本拆分为新创建的行，并以特定的分隔符分隔。
通过更改拼接方法的第二个参数，可以给出一个起点。在开始定界符发生之后的所有内容都将被拆分并放在一个新行上

如何分割第n次出现的分隔符？ （即，第二）

期望的结果应该是这样的：在第二 '/' 分隔符开始分裂：

此：
PMC37516JG/DMM/1946P/C.Q4.DUMMY

变为：
PMC37516JG/DMM
1946P/C.Q4.DUMMY

$('#tbl tr').each(function(){ 
 
    var $this = $(this); 
 
    var arr = $this.text().split('/'); 
 
    var firstTwo = arr.splice(0,2); 
 
    var firstEl = firstTwo.join('/').trim(); 
 
    arr.unshift(firstEl); 
 
    var len = arr.length; 
 
    var i; 
 
    var $previous = $this; 
 
    for (i = 0; i < arr.length; ++i) { 
 
    var $tr = $this.clone(); 
 
    $tr.find("td").text(arr[i]); 
 
    $previous.after($tr); 
 
    $previous = $tr; 
 
    } 
 
    $this.remove(); 
 
});

th { 
 
    height: 15px; 
 
    min-width: 30px; 
 
    border: 1px solid black; 
 
    font-size: 12px; 
 
    font-family: Courier, monospace; 
 
    padding: 2px 5px 2px 5px; 
 
} 
 
td { 
 
    height: 15px; 
 
    min-width: 30px; 
 
    border: 1px solid black; 
 
    font-size: 12px; 
 
    font-family: Courier, monospace; 
 
    padding: 2px 5px 2px 5px; 
 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<table id="tbl"> 
 
    <thead> 
 
    <tr class="tbl-header"> 
 
     <th>1</th> 
 
    </tr> 
 
    </thead> 
 
    <tbody> 
 
    <tr> 
 
     <td>UWS</td> 
 
    </tr> 
 
    <tr> 
 
     <td>DA8101A/12.DOH</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC37516JG/DMM/1946P/C.Q4.DUMMY</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC18713DA/DMM/2118P/C.Q4</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC17854DA/DMM/1884P/C.Q5.KIKKER</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC18964DA/DMM/1270P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC13312DA/DMM/1500P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC81630FF/DMM/2316P/C.Q5.DUMMY</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC73647FF/DMM/2540P/C.Q5.DUMMY</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC15970DA/DMM/2780P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC19458DA/DMM/2644P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC13485DA/DMM/2382P/C.Q5.KIKKER</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC88130FF/DMM/2450P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC13913DA/DMM/2930P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC19689DA/DMM/3298P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PGA2002DA/ORD/2155P/C.Q5.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC11453DA/DMM/3212P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC17664DA/ORD/1800P/C.Q4.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC90443FF/DMM/520P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC16529DA/DMM/624P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC72784FF/DMM/4218P/C.Q5.DUMMY</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC94058FF/DMM/3120P/C.Q5.DUMMY</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC91247FF/DMM/3466P/C.Q5.KIKKER</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC38632JG/DMM/3094P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC19767DA/DMM/3778P/C.Q5</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC16397DA/ORD/1420P/C.Q4.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC12044DA/DMM/2672P/C.Q4</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC37949JG/DMM/1672P/C.Q6</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC13278DA/ORD/928P/C.PLD.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC11256DA/ORD/1595P/C.PLD.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC18938DA/ORD/1458P/C.PLD.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC12294DA/ORD/4140P/C.PLD.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC14236DA/ORD/4136P/C.PLD.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC13867DA/ORD/4126P/C.PLD.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC7523DA/ORD/4152P/C.PLD.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC18036DA/ORD/4122P/C.PLD.TRANSIT</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC10478DA/DMM/1548P/C.PWG</td> 
 
    </tr> 
 
    <tr> 
 
     <td>-PMC88389FF/DMM/1164P/C.PLD</td> 
 
    </tr> 
 
    </tbody> 
 
</table>

Answer 1

改变你的脚本下面一个请核实，如果这对你的作品。

$('#tbl tr').each(function(){ 
     var tr = $(this).find('td').text().split('/'); 
    if (tr.length > 2){ 
    //you can change below code to split it by first '/' 
     var p =tr.splice(0,2); 
    $(this).replaceWith('<tr><td>' +p.join('/') +'</td></tr> <tr><td>'+tr.join('/') +'</td></tr>') 
    } 

    });