如果此字母为小写，则Javascript正则表达式匹配点和空格/空格后的第一个字母

Question

我想写一个JavaScript正则表达式，它匹配点后面的所有第一个字母，一个或多个空格（换行符），如果这个字母是小写的。我强调了我想要匹配的字母。

图片中的文字：

RegExr v3 was created by gskinner.com, and is proudly hosted by Media Temple.

Edit the Expression & Text to see matches. roll over matches or the expression for details. PCRE & Javascript flavors of RegEx are supported.

The side bar includes a Cheatsheet, full Reference, and Help. You can also Save & Share with the Community, and view patterns you create or favorite in My Patterns.

explore results with the Tools below. Replace & List output custom results. Details lists capture groups.explain describes your expression in plain English.

Answer 1

你需要这样的东西：

var str = document.getElementById('text').innerHTML;
console.log(str.match(/[.]\s+[a-z]/g));

/*
 EDIT - If you want to get only the letters
*/
var matches = [];
var regex = /[.]\s+([a-z])/g;
while (res = regex.exec(str)) {
  matches.push(res[1]);
}
console.log(matches);

#text {
  width: 100%;
}

<textarea id="text" rows="10">
RegExr v3 was created by gskinner.com, and is proudly hosted by Media Temple.

Edit the Expression & Text to see matches. roll over matches or the expression for details. PCRE & Javascript flavors of RegEx are supported.

The side bar includes a Cheatsheet, full Reference, and Help. You can also Save & Share with the Community, and view patterns you create or favorite in My Patterns.

explore results with the Tools below. Replace & List output custom results. Details lists capture groups.explain describes your expression in plain English.
</textarea>

/[.]\s+[a-z]/g

• [.] - 匹配点字符
• \s - 匹配单个空格字符，包括空格，制表符，换页符，换行符。相当于[\ f \ n \ r \ t \ v \ u00a0 \ u1680 \ u180e \ u2000- \ u200a \ u2028 \ u2029 \ u202f \ u205f \ u3000 \ ufeff]
• + - 将前面的表达式匹配1次或更多次。相当于{1，}
• [a-z] - 匹配a到z
中的任何小写字母
• g - 全球搜索

Read more

Answer 2

我认为这样做：

/\.\s+([a-z]{1})/g

\.匹配一个点

\s+匹配1个或更多空格

([a-z]{1})捕获第一个小写字母。

g全球研究

你可以在这句话中试试：https://regex101.com/r/d6JXSR/1