Perl index()

I was playing with index() in Perl today, which was a lot of fun. I started off with something similar to this code, which prints out the following:

Here is a list of my programming books
1 The Well-Grounded Rubyist
2 Pragmatic Thinking & Learning
3 Programming Ruby 1.9
4 Learning Perl

I learned how to use index() in the course I'm taking. In this example, I am using index() to print out ONLY Ruby books (and their ranking). I am aware that it's very redundant code (I'll change that later.)

Index() determines the position of a character in a string. If the string doesn't contain the character, index() will return -1.

Some interesting stuff I'm learning.

Posted in: Perl