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  1. #!/usr/bin/perl -w
  2.  
  3. use strict;
  4. use warnings;
  5.  
  6. while (<DATA>) {
  7.     chomp;
  8.  
  9. #   A - Preceded by the beginning of the line or 1 or more whitespace
  10. #       characters
  11. #   B - The characters 'C#' or 'C++'
  12. #   C - Followed by 1 or more whitespace characters of the end of line.
  13.  
  14.     if (/(?:^|\s+)(C#|C\+\+)(?=\s+|$)/) {
  15. #           ^^^^^  ^^^^^^^^    ^^^^^
  16. #             A        B         C
  17.  
  18.         print "[$1] [$_]\n";
  19.     } else {
  20.         print "[--] [$_]\n";
  21.     }
  22. }
  23.  
  24. __END__
  25. This program is written in C++ We'll delete it after ten days
  26. This program is written in !C++ We'll delete it after ten days
  27. This program is written in C++! We'll delete it after ten days
  28. This program is written in C# We'll delete it after ten days
  29. C# is the language this program is written in.
  30.  C# is the language this program is written in.
  31. C++ is the language this program is written in.
  32. This program is written in C#
  33. This program is written in C++
  34. This program is written in C++!
  35.  
Success #stdin #stdout 0s 3740KB
comments ()
stdin 
Standard input is empty
stdout 
[C++] [This program is written in C++ We'll delete it after ten days]
[--] [This program is written in !C++ We'll delete it after ten days]
[--] [This program is written in C++! We'll delete it after ten days]
[C#] [This program is written in C# We'll delete it after ten days]
[C#] [C# is the language this program is written in.]
[C#] [ C# is the language this program is written in.]
[C++] [C++ is the language this program is written in.]
[C#] [This program is written in C#]
[C++] [This program is written in C++]
[--] [This program is written in C++!]
https://ideone.com/un6032
language:
Perl (perl 5.28.1)
created:
11 years ago
visibility:
secret

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