RubyTapas: 542-abstraction-and-performance-part-2-with-chris-seaton.mp4, 541-abstraction-and-performance-part-1-with-chris-seaton.mp4

clamp.rb

num = 50
min = 100
max = 10

def clamp_slow(num, min, max)
  print "#{__method__}(num=#{num}, min=#{min}, max=#{max}) => "
  print [num, min, max].sort[1]
end

def clamp_fast(num, min, max)
  print "#{__method__}(num=#{num}, min=#{min}, max=#{max}) => "

  result = num
  result = max if num > max
  result = min if num < min

  print result
end

def clamp_opti(num, min, max)
  print "#{__method__}(num=#{num}, min=#{min}, max=#{max}) => "
  print num > max ? max : (num < min ? min : num)
end

clamp_slow num, min, max
puts
puts
clamp_fast num, min, max
puts
puts
clamp_opti num, min, max
puts
puts

num = 50
min = 100
max = 1000

clamp_slow num, min, max
puts
puts
clamp_fast num, min, max
puts
puts
clamp_opti num, min, max
puts

$ ruby clamp.rb
clamp_slow(num=50, min=100, max=10) => 50

clamp_fast(num=50, min=100, max=10) => 100

clamp_opti(num=50, min=100, max=10) => 10

clamp_slow(num=50, min=100, max=1000) => 100

clamp_fast(num=50, min=100, max=1000) => 100

clamp_opti(num=50, min=100, max=1000) => 100