Class: Neuron

Inherits:
NeuralEntity show all
Defined in:
lib/Yinspire.rb,
lib/Yinspire/Core/Neuron.rb

Overview

Base class of all Neurons. Defines the structure that is special for a Neuron, i.e. that a Neuron has pre- and post-Synapses.

Direct Known Subclasses

Neuron_Base

Instance Method Summary collapse

Methods inherited from NeuralEntity

class_from_name, #disconnect_all, #dump, entity_ann_dump_cache, entity_ann_load_cache, #entity_type, entity_type_map, entity_type_map_reverse, #initialize, #load, new_from_name

Constructor Details

This class inherits a constructor from NeuralEntity

Instance Method Details

#add_post_synapse(syn) ⇒ Object Also known as: connect

Raises:

  • (ArgumentError) 


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# File 'lib/Yinspire/Core/Neuron.rb', line 31

def add_post_synapse(syn)
  raise ArgumentError, "Synapse expected" unless syn.kind_of?(Synapse)
  raise "Synapse already connected" if syn.pre_neuron || syn.next_post_synapse

  if last = self.last_post_synapse
    assert(last.next_post_synapse == nil)
    last.next_post_synapse = syn
    self.last_post_synapse = syn # advance tail pointer
  else
    assert(self.first_post_synapse == nil)
    self.first_post_synapse = self.last_post_synapse = syn
  end

  syn.pre_neuron = self
end

#add_pre_synapse(syn) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/Yinspire/Core/Neuron.rb', line 15

def add_pre_synapse(syn)
  raise ArgumentError, "Synapse expected" unless syn.kind_of?(Synapse)
  raise "Synapse already connected" if syn.post_neuron || syn.next_pre_synapse

  if last = self.last_pre_synapse
    assert(last.next_pre_synapse == nil) # missing method: neuron instead of synapse
    last.next_pre_synapse = syn
    self.last_pre_synapse = syn # advance tail pointer
  else
    assert(self.first_pre_synapse == nil)
    self.first_pre_synapse = self.last_pre_synapse = syn
  end

  syn.post_neuron = self
end

#delete_post_synapse(syn) ⇒ Object Also known as: disconnect 



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# File 'lib/Yinspire/Core/Neuron.rb', line 73

def delete_post_synapse(syn)
  # FIXME
  raise "target must be Synapse" unless target.kind_of?(Synapse)
  raise "Synapse not connected to this Neuron" if target.pre_neuron != self 

  #
  # Find the synapse in the linked list that precedes +target+.
  #
  prev = nil
  curr = self.first_post_synapse

  while true
    break if curr == target
    break unless curr
    prev = curr
    curr = curr.next_post_synapse
  end

  raise "Synapse not in post synapse list" if curr != target

  #
  # Remove +target+ from linked list.
  #
  if prev
    prev.next_post_synapse = target.next_post_synapse
    self.last_post_synapse = prev if self.last_post_synapse == target 
  else
    #
    # target is the only synapse in the post synapse list.
    #
    assert self.first_post_synapse == target
    assert self.last_post_synapse == target
    self.first_post_synapse = nil
    self.last_post_synapse = nil
  end

  target.pre_neuron = nil
  target.next_post_synapse = nil
end

#delete_pre_synapse(syn) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/Yinspire/Core/Neuron.rb', line 47

def delete_pre_synapse(syn)
  raise ArgumentError, "Synapse expected" unless syn.kind_of?(Synapse)
  raise "Synapse not connected to this Neuron" if syn.post_neuron != self

  prev = find_preceding_synapse(syn, first_pre_synapse(), :next_pre_syapse)

  #
  # Remove +target+ from linked list.
  #
  if prev
    prev.next_pre_synapse = target.next_post_synapse
    self.last_post_synapse = prev if self.last_post_synapse == target 
  else
    #
    # target is the only synapse in the post synapse list.
    #
    assert self.first_post_synapse == target
    assert self.last_post_synapse == target
    self.first_post_synapse = nil
    self.last_post_synapse = nil
  end

  target.pre_neuron = nil
  target.next_post_synapse = nil
end

#each_connection ⇒ Object

Iterates over each outgoing connection (post synapses).



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# File 'lib/Yinspire/Core/Neuron.rb', line 119

def each_connection
  syn = self.first_post_synapse
  while syn
    yield syn
    syn = syn.next_post_synapse
  end
end