# Test the String class.
# This code is a little different than what we did in class.
s = String.new("elephant")
t = "antelope"
print s, "\n"
print "#{s.length} #{t.length}\n"
print s.upcase, "\n"
print s.index("ant"), "\n"
print s.reverse, "\n\n"

# Test the time class.
t = Time.now
print "#{t.mon}/#{t.day}/#{t.year % 1000}\n"
print t.dst?, " ", t.wday, " ", t.to_i, "\n"

# Test the array class.
a = [34, 54, 76, 23, 11, 29]
print "#{a[3]} #{a[5]} #{a.length}\n"

# Iterate over elements x of a.
a.each do |x|
	print x, " "
end
print "\n"

b = a.sort
# Change preceding line to b = a.sort!
# What difference does the ! make?

a.each do |x|
	print x, " "
end
print "\n"

b.each do |x|
	print x, " "
end
print "\n"