Ruby -- 将段落中每个句子的第一个字母大写 [英] Ruby -- capitalize first letter of every sentence in a paragraph

问题描述

使用Ruby语言，我想把每个句子的第一个字母大写，同时去掉每个句子末尾句号之前的任何空格.其他什么都不应该改变.

Using Ruby language, I would like to capitalize the first letter of every sentence, and also get rid of any space before the period at the end of every sentence. Nothing else should change.

Input =  "this is the First Sentence . this is the Second Sentence ."    
Output =  "This is the First Sentence. This is the Second Sentence."

谢谢各位.

推荐答案

使用正则表达式 (String#gsub):

Using regular expression (String#gsub):

Input =  "this is the First Sentence . this is the Second Sentence ."    
Input.gsub(/[a-z][^.?!]*/) { |match| match[0].upcase + match[1..-1].rstrip }
# => "This is the First Sentence. This is the Second Sentence."

Input.gsub(/([a-z])([^.?!]*)/) { $1.upcase + $2.rstrip }  # Using capturing group
# => "This is the First Sentence. This is the Second Sentence."

我假设 setence 以 .、?、! 结尾.

I assumed the setence ends with ., ?, !.

更新

input = "TESTest me is agreat. testme 5 is awesome"
input.gsub(/([a-z])((?:[^.?!]|\.(?=[a-z]))*)/i) { $1.upcase + $2.rstrip }
# => "TESTest me is agreat. Testme 5 is awesome"

input = "I'm headed to stackoverflow.com"
input.gsub(/([a-z])((?:[^.?!]|\.(?=[a-z]))*)/i) { $1.upcase + $2.rstrip }
# => "I'm headed to stackoverflow.com"

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