instance method

TSort#each_strongly_connected_component

() { (::Array[Node]) -> void } -> void

() -> ::Enumerator[::Array[Node], void]

each_strongly_connected_component() { |nodes| ... }

# File tmp/rubies/ruby-4.0.0/lib/tsort.rb, line 318
def each_strongly_connected_component(&block) # :yields: nodes
  each_node = method(:tsort_each_node)
  each_child = method(:tsort_each_child)
  TSort.each_strongly_connected_component(each_node, each_child, &block)
end

The iterator version of the strongly_connected_components method. <em>obj</em>.each_strongly_connected_component is similar to <em>obj</em>.strongly_connected_components.each, but modification of obj during the iteration may lead to unexpected results.

each_strongly_connected_component returns nil.

Example

class G
  include TSort
  def initialize(g)
    @g = g
  end
  def tsort_each_child(n, &b) @g[n].each(&b) end
  def tsort_each_node(&b) @g.each_key(&b) end
end

graph = G.new({1=>[2, 3], 2=>[4], 3=>[2, 4], 4=>[]})
graph.each_strongly_connected_component {|scc| p scc }
#=> [4]
#   [2]
#   [3]
#   [1]

graph = G.new({1=>[2], 2=>[3, 4], 3=>[2], 4=>[]})
graph.each_strongly_connected_component {|scc| p scc }
#=> [4]
#   [2, 3]
#   [1]

See also .each_strongly_connected_component .tsort_each #each_strongly_connected_component_from .tsort also in 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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