sample2.rb

# Here's a different way to add up an array.
fred = [ 4, 19, 3, 7, 32 ]
sum = 0
fred.each { |i| sum += i }
print "Sum of [", fred.join(" "), "] is #{sum}\n"

# Or create a secret message.
key = { 'A' => 'U', 'B' => 'Q', 'C' => 'A', 'D' => 'F', 'E' => 'D', 'F' => 'K',
        'G' => 'P', 'H' => 'W', 'I' => 'N', 'J' => 'L', 'K' => 'J', 'L' => 'M',
        'M' => 'S', 'N' => 'V', 'O' => 'Y', 'P' => 'O', 'Q' => 'Z', 'R' => 'T',
        'S' => 'E', 'T' => 'I', 'U' => 'X', 'V' => 'B', 'W' => 'G', 'X' => 'H',
        'Y' => 'R', 'Z' => 'C' }
print "\nThe encoded message is: "
"The secret message".each_byte do | b |
    b = b.chr.upcase
    if key.has_key?(b) then
        print key[b]
    else
        print b
    end
end
print "\n"

# But give us the info to read it anyway.
print "The key is: "
ct = 8
key.each { | k, v | 
    if ct == 8 then 
        print "\n   "
        ct = 0
    else
        print ", "
    end
    ct = ct + 1
    print "#{v} => #{k}"  
}
print "\n\n"

# Some interesting things from Integer.
3.times { print "Hi! " }
print "\n"

print "Count: "
3.upto(7) { |n| print n, " " }
print "\n"