Програмиране с Ruby

Курс във Факултета по Математика и Информатика към СУ

Решение на Първа задача от Деян Хаджиев

Обратно към всички решения

Към профила на Деян Хаджиев

Резултати

  • 6 точки от тестове
  • 0 бонус точки
  • 6 точки общо
  • 14 успешни тест(а)
  • 0 неуспешни тест(а)

Код

class Integer
def prime?
if self <= 1
false
elsif self == 2
true
else
2.upto(Math.sqrt(self).ceil).all? { |x| self.remainder(x).nonzero? }
end
end
def prime_factors
factors = []
divided = self.abs
2.upto(abs).select { |x| x.prime? and remainder(x).zero? }.each do |fact|
factors << fact and divided /= fact while divided.remainder(fact).zero?
end
factors
end
def harmonic
raise "ERROR: negative input" if self <= 0
sum = Rational(0, 1)
1.upto(self).each { |denominator| sum += Rational(1, denominator) }
sum
end
def digits
digits_array = [abs % 10]
remainder = abs / 10
until remainder == 0
digits_array << remainder % 10
remainder /= 10
end
digits_array.reverse
end
end
class Array
def frequencies
frequency = {}
self.each do |element|
if frequency[element] == nil
frequency[element] = 1
else
frequency[element] += 1
end
end
frequency
end
def average
raise "ERROR: empty array" if empty?
sum = 0.0
each { |i| sum += i}
sum / length
end
def drop_every(n)
raise "ERROR: negative or zero n" if n <= 0
if length < n then self else take(n - 1) + drop(n).drop_every(n) end
end
def combine_with(other)
if empty?
other
elsif other.empty?
self
else
take(1) + other.take(1) + drop(1).combine_with(other.drop 1)
end
end
end

Лог от изпълнението

..............

Finished in 0.04397 seconds
14 examples, 0 failures

История (1 версия и 0 коментара)

Деян обнови решението на 14.10.2013 23:11 (преди около 11 години)

+class Integer
+ def prime?
+ if self <= 1
+ false
+ elsif self == 2
+ true
+ else
+ 2.upto(Math.sqrt(self).ceil).all? { |x| self.remainder(x).nonzero? }
+ end
+ end
+
+ def prime_factors
+ factors = []
+ divided = self.abs
+ 2.upto(abs).select { |x| x.prime? and remainder(x).zero? }.each do |fact|
+ factors << fact and divided /= fact while divided.remainder(fact).zero?
+ end
+ factors
+ end
+
+ def harmonic
+ raise "ERROR: negative input" if self <= 0
+ sum = Rational(0, 1)
+ 1.upto(self).each { |denominator| sum += Rational(1, denominator) }
+ sum
+ end
+
+ def digits
+ digits_array = [abs % 10]
+ remainder = abs / 10
+ until remainder == 0
+ digits_array << remainder % 10
+ remainder /= 10
+ end
+ digits_array.reverse
+ end
+end
+
+class Array
+ def frequencies
+ frequency = {}
+ self.each do |element|
+ if frequency[element] == nil
+ frequency[element] = 1
+ else
+ frequency[element] += 1
+ end
+ end
+ frequency
+ end
+
+ def average
+ raise "ERROR: empty array" if empty?
+ sum = 0.0
+ each { |i| sum += i}
+ sum / length
+ end
+
+ def drop_every(n)
+ raise "ERROR: negative or zero n" if n <= 0
+ if length < n then self else take(n - 1) + drop(n).drop_every(n) end
+ end
+
+ def combine_with(other)
+ if empty?
+ other
+ elsif other.empty?
+ self
+ else
+ take(1) + other.take(1) + drop(1).combine_with(other.drop 1)
+ end
+ end
+end