javascript - 如何使用 jQuery 提取单个句子？

Question

我试图从一堆段落中提取两个句子，但我陷入困境......基本上，这些段落看起来像这样:

<p class="some_paragraph">This is a sentence. Here comes another sentence. A third sentence.</p>
<p class="some_paragraph">Another sentence here. Interesting information. Very interesting.</p>
<p class="some_paragraph">This is a sentence. Here comes another sentence. A third sentence.</p>

我需要做的是从这三个段落中的所有 9 个句子中找到两个“最短”的句子。提取的两个句子必须放入以下范围内:

<span class="span1">Shortest sentence comes here</span>
<span class="span2">Second shortest sentence comes here</span>

我该怎么做？

Answer 1

var snt = [];
$('.some_paragraph').each(function() {
    var text = $(this).text();
    text.replace(/[A-Z][^.]+\./g, function(s) {
        if (snt.length < 2) {
            snt.push(s);
        }
        else {
           snt[+(snt[0].length <= snt[1].length)] = s;
        }
    });
});

console.log(snt); // outputs the two shortest sentences

/* creating two span with shortest sentences */
snt.map(function(el, i) {
   $('<span />', { class: "span" + (i+1), text: el }).appendTo($('body')); 
});


/**
 * Result:
 *  
 * <span class="span1">Very interesting.</span>
 * <span class="span2">A third sentence.</span>
 */

fiddle 示例:http://jsfiddle.net/4La9y/2/

需要明确的是，这个关键声明 snt[+(snt[0].length <= snt[1].length)] = s;意味着如果我已经用两个句子填充了数组，那么您找到的下一个将存储在 snt[0] 的位置如果snt[1]是最短的，反之亦然