Module: AssociationItem

Extended by:
Entity
Defined in:
lib/rbbt/association/item.rb

Constant Summary

Constants included from Entity

Entity::UNPERSISTED_PREFIX

Instance Attribute Summary

Attributes included from Entity

#all_formats

Class Method Summary collapse

Methods included from Entity

extended

Class Method Details

.incidence(pairs, key_field = nil) ⇒ Object 



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# File 'lib/rbbt/association/item.rb', line 46

def self.incidence(pairs, key_field = nil)
  matrix = {}
  targets = []
  sources = []
  matches = {}

  pairs.each do |p|
    s, sep, t = p.partition "~"
    sources << s
    targets << t
    matches[s] ||= Hash.new{false}
    matches[s][t] = true
  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