Tokenize a string

Tokenize a string
You are encouraged to solve this task according to the task description, using any language you may know.

Separate the string "Hello,How,Are,You,Today" by commas into an array so that each index of the array stores a different word. Display the words to the 'user', in the simplest manner possible, separated by a period. To simplify, you may display a trailing period.

Perl

Interpreter: Perl any 5.X

# in split, between the // goes a regex
my @words = split(/,/, "Hello,How,Are,You,Today");
print join('.', @words); # does not include a trailing period

Alternate

my @words = split(/,/, "Hello,How,Are,You,Today");
print $_.'.' for (@words); # includes a trailing period

Or my personal favorite, the one liner

print join('.', split(/,/, "Hello,How,Are,You,Today"));

Ruby

    string = "Hello,How,Are,You,Today".split(',')
    string.each do |w|
         print "#{w}."
    end