An abstract class for enumerating pseudo-prime numbers.
Concrete subclasses should override succ, next, rewind.
Class Methods
lib/prime.rb
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# File tmp/rubies/ruby-2.3.8/lib/prime.rb, line 233
def initialize(ubound = nil)
@ubound = ubound
end
No documentation available
Instance Methods
lib/prime.rb
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# File tmp/rubies/ruby-2.3.8/lib/prime.rb, line 265
def each
return self.dup unless block_given?
if @ubound
last_value = nil
loop do
prime = succ
break last_value if prime > @ubound
last_value = yield prime
end
else
loop do
yield succ
end
end
end
Iterates the given block for each prime number.
#
lib/prime.rb
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# File tmp/rubies/ruby-2.3.8/lib/prime.rb, line 253
def next
raise NotImplementedError, "need to define `next'"
end
alias of succ
.
#
lib/prime.rb
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# File tmp/rubies/ruby-2.3.8/lib/prime.rb, line 260
def rewind
raise NotImplementedError, "need to define `rewind'"
end
Rewinds the internal position for enumeration.
See Enumerator
#rewind.
#
lib/prime.rb
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# File tmp/rubies/ruby-2.3.8/lib/prime.rb, line 300
def size
Float::INFINITY
end
No documentation available
#
lib/prime.rb
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# File tmp/rubies/ruby-2.3.8/lib/prime.rb, line 248
def succ
raise NotImplementedError, "need to define `succ'"
end
returns the next pseudo-prime number, and move the internal position forward.
PseudoPrimeGenerator
#succ raises NotImplementedError
.
lib/prime.rb
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# File tmp/rubies/ruby-2.3.8/lib/prime.rb, line 240
def upper_bound
@ubound
end
No documentation available
lib/prime.rb
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# File tmp/rubies/ruby-2.3.8/lib/prime.rb, line 237
def upper_bound=(ubound)
@ubound = ubound
end
No documentation available
lib/prime.rb
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# File tmp/rubies/ruby-2.3.8/lib/prime.rb, line 282
def with_index(offset = 0)
return enum_for(:with_index, offset) { Float::INFINITY } unless block_given?
return each_with_index(&proc) if offset == 0
each do |prime|
yield prime, offset
offset += 1
end
end
see Enumerator
#with_index.
lib/prime.rb
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# File tmp/rubies/ruby-2.3.8/lib/prime.rb, line 293
def with_object(obj)
return enum_for(:with_object, obj) { Float::INFINITY } unless block_given?
each do |prime|
yield prime, obj
end
end
see Enumerator
#with_object.