Class: Operator::MutationRipple

Inherits:

Object

• Object
• Operator::MutationRipple

show all

Defined in:

../lib/mutation_ripple.rb

Overview

Instance Attribute Summary (collapse)

• - (Object) magnitude

  The maximal possible value of the mutaton plus 1.

• - (Object) random

  The source of randomness, used for calling “random.rand( limit )”, defaulting to ‘Kernel’ class.

Instance Method Summary (collapse)

• - (MutationRipple) initialize(dummy = nil, magnitude = nil) constructor

  Create the mutation operator with default settings.

• - (Object) mutation(orig, dummy = nil)

  Select the random position within the orig vector and mutate it.

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# File '../lib/mutation_ripple.rb', line 48

def initialize dummy=nil, magnitude=nil
  @random = Kernel
  @magnitude = magnitude
end

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# File '../lib/mutation_ripple.rb', line 58

def magnitude
  @magnitude
end

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# File '../lib/mutation_ripple.rb', line 54

def random
  @random
end

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# File '../lib/mutation_ripple.rb', line 63

def mutation( orig, dummy=nil )
  mutant = orig.clone
  max = @magnitude.nil? ? mutant.max+1 : @magnitude
  where = @random.rand( orig.size )
  mutant[ where ] = @random.rand( max )
  mutant
end