class SchmittTrigger

Constants

VERSION

Attributes

lower_threshold[RW]

output[R]

upper_threshold[RW]

Public Class Methods

new(lower_threshold, upper_threshold) click to toggle source

# File lib/schmitt_trigger.rb, line 10
def initialize(lower_threshold, upper_threshold)
  raise LowerThresholdGreaterThanUpperThreshold unless lower_threshold <= upper_threshold
  raise LowerThresholdSameAsUpperThreshold unless lower_threshold != upper_threshold
  @lower_threshold = lower_threshold
  @upper_threshold = upper_threshold
end

Public Instance Methods

run(input) click to toggle source

# File lib/schmitt_trigger.rb, line 17
def run(input)
  input = [input] unless input.is_a? Array
  [].tap do |arr|
    input.each { |i| arr << trigger(i) }
  end
end

Private Instance Methods

trigger(input) click to toggle source

# File lib/schmitt_trigger.rb, line 26
def trigger(input)
  @output = lower_threshold if output.nil?
  case
  when output == lower_threshold && input >= upper_threshold
    @output = upper_threshold
  when output == upper_threshold && input <= lower_threshold
    @output = lower_threshold
  end
  output
end