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Contents
# frozen_string_literal: true
module UmbrellioUtils
module Rounding
extend self
SUPER_ROUND_DEFAULT_TARGETS = [1.0, 1.5, 2.5, 5.0, 10.0].freeze
def fancy_round(number, rounding_method: :round, ugliness_level: 1)
return 0 unless number.positive?
log = Math.log(number, 10).floor
coef = 2**ugliness_level
(number * coef).public_send(rounding_method, -log) / coef.to_f
end
def super_round(number, rounding_method: :round, targets: SUPER_ROUND_DEFAULT_TARGETS)
return 0 unless number.positive?
coef = 10**Math.log(number, 10).floor
num = number / coef.to_f
best_diff = best_target = nil
targets.each do |target|
diff = target - num
next if rounding_method == :ceil && diff.negative?
next if rounding_method == :floor && diff.positive?
if best_diff.nil? || diff.abs < best_diff
best_diff = diff.abs
best_target = target
end
end
(best_target.to_d * coef).to_f
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems