javascript - 如何使用 jQuery 按条件在 html 表上连续获取重复值

Question

我试图确定一个数字在表格行中连续重复了多少次。当发现 3 次或更多次出现时，我需要将 td 的颜色更改为红色，如下所示:

Expected result:

我的正则表达式工作正常，但我无法获得正确的重复计数并更改 td 的颜色....

x = $("table").find("tr");
text = "";

x.each(function(line){
  number = $(this).text();
  check = checkNum(number);
  console.log(checkNum(number));

  if(check.length > 0){
    repeats = check[0][1];
    text += "Number "+number[check[0]['index']]+" was repeated "+repeats+ " times on line "+line+"<br>";
    $('#results').html(text);
    $(this).css('color', 'red');
  }
});

function checkNum(num) {
    var tempArray = [];
    num = num.replace(/\s+/g,"_");
    exp = new RegExp(/([0-9])\1{2,}/, "g");
    ex = exp.exec(num);

    if(ex){
     tempArray.push(ex);
    }

    return tempArray;
}

请查看this fiddle

Answer 1

这是实现它的功能方法(没有正则表达式):

$("#results").html(
    [].concat.apply(
        $.map($("table tr"), function(tr, line){
            return $(tr).children().get().reduceRight(function (acc, td, i) {
                var txt = $(td).text();
                if (txt === acc[0][0]) 
                    acc[0][1] = i; // Extend range
                else
                    acc.unshift([txt, i, i+1]); // Add a new range
                return acc;
            }, [[null, 0, 0]])
            .filter(function (range) { // Get the ranges that are long enough
                return range[2] - range[1] >= 3;
            })
            .map(function (range) { // Map them to strings, and apply the styling
                $(tr).children().slice(range[1], range[2]).css('color', 'red');
                return "Number "+range[0]+" was repeated "+(range[2] - range[1])+ " times on line "+line;
            })
        })
    ).join("<br>")
);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
<tr><td>2</td><td>3</td><td>1</td><td>5</td><td>1</td><td>1</td><td>1</td><td>1</td><td>0</td></tr>
<tr><td>0</td><td>5</td><td>1</td><td>1</td><td>8</td><td>3</td><td>3</td><td>3</td><td>4</td></tr>
<tr><td>0</td><td>4</td><td>1</td><td>5</td><td>8</td><td>7</td><td>6</td><td>3</td><td>4</td></tr>
<tr><td>5</td><td>2</td><td>2</td><td>2</td><td>2</td><td>9</td><td>2</td><td>2</td><td>0</td></tr>
<tr><td>1</td><td>4</td><td>4</td><td>4</td><td>2</td><td>4</td><td>4</td><td>4</td><td>4</td></tr>

</table>
<div id='results'>
</div>