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Class: Prime::EratosthenesGenerator

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, PseudoPrimeGenerator
Instance Chain:
self, PseudoPrimeGenerator, Enumerable
Inherits: Prime::PseudoPrimeGenerator
Defined in: lib/prime.rb

Overview

An implementation of PseudoPrimeGenerator.

Uses EratosthenesSieve.

Class Method Summary

PseudoPrimeGenerator - Inherited

.new

Instance Attribute Summary

PseudoPrimeGenerator - Inherited

#upper_bound, #upper_bound=

Instance Method Summary

PseudoPrimeGenerator - Inherited

#each

Iterates the given block for each prime number.
#next

alias of #succ.
#rewind

Rewinds the internal position for enumeration.
#size,
#succ

returns the next pseudo-prime number, and move the internal position forward.
#with_index

see Enumerator#with_index.
#with_object

see Enumerator#with_object.

Constructor Details

.new ⇒ EratosthenesGenerator

[ GitHub ] 

  


# File 'lib/prime.rb', line 310



def initialize
  @last_prime_index = -1
  super
end


  







Instance Method Details



  

    #next  
  



  

    

Alias for #succ.


  



  [ GitHub ]


  

  


# File 'lib/prime.rb', line 322



alias next succ


  








  

    #rewind  
  

  [ GitHub ]


  

  


# File 'lib/prime.rb', line 319



def rewind
  initialize
end


  








  

    #succ  
    Also known as: #next
  

  [ GitHub ]


  

  


# File 'lib/prime.rb', line 315



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