如何使用大写字母替换大写字母后跟一段时间？

Question

Anytime a strings contains a capital letter followed by a period, I'd like to replace the capital letter and period with just the capital letter.

Today MR. Johnson walked to the mail box.
=> Today MR Johnson walked to the mail box.

William SR. won the race.
=> William SR won the race.

I tried to accomplish this using gsub :

MyText = "William SR. won the race."
MyText = MyText.gsub(/[A-Z]\./,**I DON'T KNOW WHAT TO PUT HERE**]

I can match the capital letter followed by the period, but I can't figure out how to replace my match with the capital letter that precedes the period.

Answer 1

另一种没有环视和使用捕获组的方法：

MyText = MyText.gsub(/([A-Z])\./,'\1')

Answer 2

You should use a positive look behind to match it and replace it with nothing.

MyText = "William SR. won the race."
MyText = MyText.gsub(/(?<=[A-Z])\./, '')

Here is an example of it on Rubular. You could just use gsub! if you know you want to do the replacement in place instead of making a copy.