Ruby for Perl programmers

3.1 Numbers

number = 20
5.times do
        print number.class, " ", number, "\n"
        number *= number
end

Fixnum 20
Fixnum 400
Fixnum 160000
Bignum 25600000000
Bignum 655360000000000000000

3.times        { print "Hey! " }
15.downto(12)  { |i| print i, " " }
30.step(40, 5) { |i| print i, " " }

Hey! Hey! Hey! 15 14 13 12 30 35 40

No automatic string-to-number conversion!

nums = "19:45".split(':')
printf "Minutes: %d\n", nums[0] * 60 + nums[1]

Minutes: 191919191919...191919191945

Should be written as:

nums = "19:45".split(':') printf "Minutes: %d\n", nums[0].to_i * 60 + nums[1].to_i

Minutes: 1185