ruby - how to change elements into upper case
===

How can I turn an array of elements into uppercase

i.e.

["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"]  
=>  
["MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY"]

The following didn't work and left them as lower case.

Day.weekday.map(&:name).each {|the_day| the_day.upcase }
 => ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"] 