gcd.rb:4
def gcd(a, b)
# # ********************************************************
# # This tests the 'list' command.
# # ********************************************************
# set basename on
basename is on.
# list
[-1, 8] in gcd.rb
   1  #!/usr/bin/env ruby
   2  
   3  # GCD. We assume positive numbers
=> 4  def gcd(a, b)
   5    # Make: a <= b
   6    if a > b
   7      a, b = [b, a]
   8    end
# list
[9, 18] in gcd.rb
   9  
   10    return nil if a <= 0
   11  
   12    if a == 1 or b-a == 0
   13      return a
   14    end
   15    return gcd(b-a, a)
   16  end
   17  
   18  gcd(3,5)
# list
[9, 18] in gcd.rb
   9  
   10    return nil if a <= 0
   11  
   12    if a == 1 or b-a == 0
   13      return a
   14    end
   15    return gcd(b-a, a)
   16  end
   17  
   18  gcd(3,5)
# list
[9, 18] in gcd.rb
   9  
   10    return nil if a <= 0
   11  
   12    if a == 1 or b-a == 0
   13      return a
   14    end
   15    return gcd(b-a, a)
   16  end
   17  
   18  gcd(3,5)
# list -
[-1, 8] in gcd.rb
   1  #!/usr/bin/env ruby
   2  
   3  # GCD. We assume positive numbers
=> 4  def gcd(a, b)
   5    # Make: a <= b
   6    if a > b
   7      a, b = [b, a]
   8    end
# list -
[-1, 8] in gcd.rb
   1  #!/usr/bin/env ruby
   2  
   3  # GCD. We assume positive numbers
=> 4  def gcd(a, b)
   5    # Make: a <= b
   6    if a > b
   7      a, b = [b, a]
   8    end
# list -
[-1, 8] in gcd.rb
   1  #!/usr/bin/env ruby
   2  
   3  # GCD. We assume positive numbers
=> 4  def gcd(a, b)
   5    # Make: a <= b
   6    if a > b
   7      a, b = [b, a]
   8    end
# list -
[-1, 8] in gcd.rb
   1  #!/usr/bin/env ruby
   2  
   3  # GCD. We assume positive numbers
=> 4  def gcd(a, b)
   5    # Make: a <= b
   6    if a > b
   7      a, b = [b, a]
   8    end
# list 1
[-4, 5] in gcd.rb
   1  #!/usr/bin/env ruby
   2  
   3  # GCD. We assume positive numbers
=> 4  def gcd(a, b)
   5    # Make: a <= b
# list 20
[15, 18] in gcd.rb
   15    return gcd(b-a, a)
   16  end
   17  
   18  gcd(3,5)
# set listsize 5
Number of source lines to list by default is 5.
# list 5
[3, 7] in gcd.rb
   3  # GCD. We assume positive numbers
=> 4  def gcd(a, b)
   5    # Make: a <= b
   6    if a > b
   7      a, b = [b, a]
# list =
[2, 6] in gcd.rb
   2  
   3  # GCD. We assume positive numbers
=> 4  def gcd(a, b)
   5    # Make: a <= b
   6    if a > b
# list 3-4
[3, 4] in gcd.rb
   3  # GCD. We assume positive numbers
=> 4  def gcd(a, b)
#