Module: SLSP::CircleMethod::InternalUseOnly

Defined in:
lib/slsp/circlemethod.rb

Overview

:nodoc: all

Class Method Summary collapse

Class Method Details

.convert_to_non_negative_int(n) ⇒ Object 



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# File 'lib/slsp/circlemethod.rb', line 9

def self.convert_to_non_negative_int n
  unless n.respond_to?(:to_int)
    raise TypeError.new("no implicit conversion of #{n.class} into Integer")
  end
  i = n.to_int
  if i < 0
    raise RangeError.new("#{n} must be a non-negative value")
  end
  i
end

.each_of_even(n) ⇒ Object 



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# File 'lib/slsp/circlemethod.rb', line 20

def self.each_of_even(n)
  n_1 = n-1
  n_1.times do |i|
    q = i + 1
    r = q + n - 3
    yield [i, n_1]
    (n/2-1).times do |j|
      yield [q%n_1, r%n_1]
      q+=1
      r-=1
    end
  end
end

.each_of_odd(n) ⇒ Object 



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# File 'lib/slsp/circlemethod.rb', line 33

def self.each_of_odd(n)
  n.times do |i|
    q = i + 1
    r = q + n - 2
    ((n+1)/2-1).times do |j|
      yield [q%n, r%n]
      q+=1
      r-=1
    end
  end
end

.each_with_fair_break_of_even(n) ⇒ Object 



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# File 'lib/slsp/circlemethod.rb', line 45

def self.each_with_fair_break_of_even(n)
  n_1 = n-1
  n_1.times do |i|
    q = i + 1
    r = q + n - 3
    yield(
      if 0==i or i.odd?
        [i, n_1]
      else
        [n_1, i]
      end
    )
    (n/2-1).times do |j|
      yield(
        if j.even?
          [r%n_1, q%n_1]
        else
          [q%n_1, r%n_1]
        end
      )
      q+=1
      r-=1
    end
  end
end

.each_with_fair_break_of_odd(n) ⇒ Object 



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# File 'lib/slsp/circlemethod.rb', line 70

def self.each_with_fair_break_of_odd(n)
  n.times do |i|
    q = i + 1
    r = q + n - 2
    ((n+1)/2-1).times do |j|
      yield(
        if j.even?
          [r%n, q%n]
        else
          [q%n, r%n]
        end
      )
      q+=1
      r-=1
    end
  end
end