Many many years ago, I used to write a lot of perl code. Then I discovered PHP and thankfully I didn't have to use perl anymore. As a result I have forgotten many of the perl tricks that I learnt. Now you might say that is good news, unfortunately occaisionally I find myself occaisionally having to read/write a perl script.
One of the gripes is that a language that is so good at string handling does not have a trim() function like what you find in perl. You need two lines of forgettable perl code to achieve the same result. (chomp is only good for removing the trailing newline)