I didn’t know you could do that in ruby but its pretty cool

As someone who's new to programming and doesn't know Ruby at all, can you (or someone) please explain how it works, what it does, and how would someone use it?

I find it beautiful, tho :)

    -rcvs

Load the (built-in) CSV module in Ruby.

    -e

Eval the following string as Ruby code.

    CSV($<)

Create CSV parser with standard input `$<` as the source.

    .each 

Run the code in the block that follows for each row (automatically skips the CSV header):

    { |r| puts r[0] }

For a row, print the first/0th element. Can be simplified in recent Ruby:

    { puts _1[0] }

Thank you so much! This got me looking at the Ruby documentation about blocks. Very cool feature!