Module: AssociationItem
- Extended by:
- Object::Entity
- Defined in:
- lib/rbbt/association/item.rb
Class Method Summary collapse
- ._select_match(orig, elem) ⇒ Object
- .adjacency(pairs, key_field = nil, &block) ⇒ Object
- .incidence(pairs, key_field = nil, &block) ⇒ Object
- .select(list, method = nil, &block) ⇒ Object
Class Method Details
._select_match(orig, elem) ⇒ Object
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# File 'lib/rbbt/association/item.rb', line 188 def self._select_match(orig, elem) if Array === orig and Array === elem (orig & elem).any? elsif Array === orig orig.include? elem elsif Array === elem elem.include? orig else elem === orif end false end |
.adjacency(pairs, key_field = nil, &block) ⇒ Object
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# File 'lib/rbbt/association/item.rb', line 176 def self.adjacency(pairs, key_field = nil, &block) incidence = incidence(pairs, key_field, &block) targets = incidence.fields adjacency = TSV.setup({}, :key_field => incidence.key_field, :fields => ["Target"], :type => :double) TSV.traverse incidence, :into => adjacency, :unnamed => true do |k,values| target_values = targets.zip(values).reject{|t,v| v.nil? }.collect{|t,v| [t,v]} next if target_values.empty? [k, Misc.zip_fields(target_values)] end end |
.incidence(pairs, key_field = nil, &block) ⇒ Object
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# File 'lib/rbbt/association/item.rb', line 145 def self.incidence(pairs, key_field = nil, &block) matrix = {} targets = [] sources = [] matches = {} pairs.inject([]){|acc,m| acc << m; acc << m.invert if m.respond_to?(:undirected) and m.undirected; acc }.each do |p| s, sep, t = p.partition "~" sources << s targets << t if block_given? matches[s] ||= Hash.new{nil} value = block.call p matches[s][t] = value unless value.nil? or (mv = matches[s][t] and value > mv) else matches[s] ||= Hash.new{false} matches[s][t] ||= true end end sources.uniq! targets = targets.uniq.sort matches.each do |s,hash| matrix[s] = hash.values_at(*targets) end defined?(TSV)? TSV.setup(matrix, :key_field => (key_field || "Source") , :fields => targets, :type => :list) : matrix end |
.select(list, method = nil, &block) ⇒ Object
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# File 'lib/rbbt/association/item.rb', line 201 def self.select(list, method = nil, &block) if method and method.any? list.select do |item| method.collect do |key,value| case key when :target _select_match item.target, value when :source _select_match item.source, value else orig = item.info[key] orig = orig.split(";;") if String orig _select_match orig, value end end end else list.select(&block) end end |