Class: Prime::EratosthenesGenerator

Inherits:

PseudoPrimeGenerator

• Object
• PseudoPrimeGenerator
• Prime::EratosthenesGenerator

Defined in:

lib/prime.rb

Overview

An implementation of PseudoPrimeGenerator.

Uses EratosthenesSieve.

Instance Method Summary

• #initialize ⇒ EratosthenesGenerator constructor

  A new instance of EratosthenesGenerator.

• #rewind ⇒ Object
• #succ ⇒ Object (also: #next)

Methods inherited from PseudoPrimeGenerator

#each, #size, #upper_bound, #upper_bound=, #with_index, #with_object

Constructor Details

#initialize ⇒ EratosthenesGenerator

Returns a new instance of EratosthenesGenerator.

# File 'lib/prime.rb', line 411

def initialize
  @last_prime_index = -1
  super
end

Instance Method Details

#rewind ⇒ Object

# File 'lib/prime.rb', line 420

def rewind
  initialize
end

#succ ⇒ Object Also known as: next

# File 'lib/prime.rb', line 416

def succ
  @last_prime_index += 1
  EratosthenesSieve.instance.get_nth_prime(@last_prime_index)
end