定义您的规则：[！？] // 1.句子以大写字母 // 2.句子是由什么或之前开始的，但不是[，：;] // 3.如果格式不正确，则可以在引号之前加上引号，例如[“'] // 4.如果引用之后的单词是名称
任何其他规则
定义你的目的： // 1.删除最后一句
假设： 如果从最后一个字符的文本字符串的开始和向后工作，那么你会找出句子的开头： 1。字符前面的文本字符串是[。？！]或 2.字符前面的文本字符串是[“']，前面是大写字母 3.每个[。]前面都有一个空格 4。我们不纠正html标签 5.这些假设不健全，需要定期修改
可能的解决方案： 读入您的字符串并将其拆分到空格字符上，以给我们大量字符串进行反向查看。
var characterGroups = $('#this-paragraph').html().split(' ').reverse();
如果你的字符串是：
BLABLA，这里一些文字。有时使用基本的html代码，但不应该使句子的“选择”更难！我抬头看窗户，我看到一架飞机飞过。我问了第一个想到的事情：“那里有什么？”她不知道，“我认为我们应该越过围栏！”，她很快说。他后来形容为：“疯狂的东西。“
var originalString = 'Blabla, some more text here. Sometimes <span>basic</span> html code is used but that should not make the "selection" of the sentence any harder! I looked up the window and I saw a plane flying over. I asked the first thing that came to mind: "What is it doing up there?" She did not know, "I think we should move past the fence!", she quickly said. He later described it as: "Something insane."';
然后你在characterGroups阵列将是：
["insane."", ""Something", "as:", "it", "described", "later", "He",
"said.", "quickly", "she", "fence!",", "the", "past", "move", "should", "we",
"think", ""I", "know,", "not", "did", "She", "there?"", "up", "doing", "it",
"is", ""What", "mind:", "to", "came", "that", "thing", "first", "the", "asked",
"I", "over.", "flying", "plane", "a", "saw", "I", "and", "window", "the", "up",
"looked", "I", "harder!", "any", "sentence", "the", "of", ""selection"", "the",
"make", "not", "should", "that", "but", "used", "is", "code", "html", "basic",
"Sometimes", "here.", "text", "more", "some", "Blabla,"]
注：的'标签和其他人使用的.text（）方法来去除jQuery中
每个块后跟一个空格，所以当我们确定了我们的句子开始位置（通过数组索引）时，我们将知道该空间有什么索引，并且我们可以将原始字符串拆分为l这个空间占据了句子结尾的那个索引。
给自己一个变量来标记，如果我们发现与否和一个变量来保存的数组元素的索引位置，我们确定为保持最后一句的开头：
var found = false;
var index = null;
遍历数组，并寻找任何元素结束[。！？]或“前一个元素开始以大写字母在那里结束。
var position = 1,//skip the first one since we know that's the end anyway
elements = characterGroups.length,
element = null,
prevHadUpper = false,
last = null;
while(!found && position < elements) {
element = characterGroups[position].split('');
if(element.length > 0) {
last = element[element.length-1];
// test last character rule
if(
last=='.' // ends in '.'
|| last=='!' // ends in '!'
|| last=='?' // ends in '?'
|| (last=='"' && prevHadUpper) // ends in '"' and previous started [A-Z]
) {
found = true;
index = position-1;
lookFor = last+' '+characterGroups[position-1];
} else {
if(element[0] == element[0].toUpperCase()) {
prevHadUpper = true;
} else {
prevHadUpper = false;
}
}
} else {
prevHadUpper = false;
}
position++;
}
如果你运行上面的脚本会正确识别‘他’为最后一句的开头
0123再次
var trimPosition = originalString.lastIndexOf(lookFor)+1;
var updatedString = originalString.substr(0,trimPosition);
console.log(updatedString);
// Blabla, some more text here. Sometimes <span>basic</span> html code is used but that should not make the "selection" of the sentence any harder! I looked up the window and I saw a plane flying over. I asked the first thing that came to mind: "What is it doing up there?" She did not know, "I think we should move past the fence!", she quickly said.
运行，并得到： BLABLA，这里一些文字现在
console.log(characterGroups[index]); // He at index=6
，你可以通过你收到的字符串运行。有时使用基本的html代码，但不应该使句子的“选择”更难！我抬头看窗户，我看到一架飞机飞过。我问了第一个想到的事情：“那里有什么？”
再次运行它并得到： Blabla，一些更多的文字在这里。有时使用基本的html代码，但不应该使句子的“选择”更难！我抬头看窗户，我看到一架飞机飞过。
再次运行它并得到： Blabla，一些更多的文字在这里。有时使用基本的html代码，但不应该使句子的“选择”更难！
再次运行它并得到： Blabla，一些更多的文字在这里。
再次运行它并得到： Blabla，一些更多的文字在这里。
所以，我认为这符合你在找什么？
作为一个功能：
function trimSentence(string){
var found = false;
var index = null;
var characterGroups = string.split(' ').reverse();
var position = 1,//skip the first one since we know that's the end anyway
elements = characterGroups.length,
element = null,
prevHadUpper = false,
last = null,
lookFor = '';
while(!found && position < elements) {
element = characterGroups[position].split('');
if(element.length > 0) {
last = element[element.length-1];
// test last character rule
if(
last=='.' || // ends in '.'
last=='!' || // ends in '!'
last=='?' || // ends in '?'
(last=='"' && prevHadUpper) // ends in '"' and previous started [A-Z]
) {
found = true;
index = position-1;
lookFor = last+' '+characterGroups[position-1];
} else {
if(element[0] == element[0].toUpperCase()) {
prevHadUpper = true;
} else {
prevHadUpper = false;
}
}
} else {
prevHadUpper = false;
}
position++;
}
var trimPosition = string.lastIndexOf(lookFor)+1;
return string.substr(0,trimPosition);
}
是微不足道的做一个插件，如果，但要小心的假设！ :)
这有帮助吗？
感谢， AE
定义“最后一句”和“长字符串”。如果您正在寻找限制文本中行数的方法，请参阅** [此答案]（http://stackoverflow.com/questions/7519337/given-a-textarea-is-there-a-方式对限制长度基于上的线/ 7521855＃7521855）**。 –
编辑我的问题，通过句子我的意思是一个真正的句子，见上文。 :) – bartolsthoorn
***他后来形容为：“疯狂的东西。”***我不是英语专业..但这是正确的吗？或者它应该是***他后来形容它是“疯狂的东西”。*** – rlemon