remove text after final period in string

Question

I have a grep puzzle that\'s eluding me: I\'d like to remove the text following the final period in a collection of strings (i am using R, so perl

Answer 1

I cannot help you with r and I almost forgot perl, but this works both in JS (proof) and PHP

/\.[A-Za-z]+$/     -->    replace this with empty string ""
  ^    ^    ^
  |    |    |
  |    |    end of line
  |    only chars (you can add 0-9 if numbers are also present)
  dot before last chars

the syntax of regex is rather common, so I'm sure you can adopt it (maybe just get rid of /)