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Initialize default traversal state when component enumerators run #36

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Initialize default traversal state when component enumerators run #36

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7 changes: 5 additions & 2 deletions lib/tsort.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -385,7 +385,7 @@ def self.each_strongly_connected_component(each_node, each_child) # :yields: nod
# #=> [4]
# # [2, 3]
#
def each_strongly_connected_component_from(node, id_map={}, stack=[], &block) # :yields: nodes
def each_strongly_connected_component_from(node, id_map=nil, stack=nil, &block) # :yields: nodes
TSort.each_strongly_connected_component_from(node, method(:tsort_each_child), id_map, stack, &block)
end

Expand All @@ -410,9 +410,12 @@ def each_strongly_connected_component_from(node, id_map={}, stack=[], &block) #
# # [2, 3]
# # [1]
#
def self.each_strongly_connected_component_from(node, each_child, id_map={}, stack=[]) # :yields: nodes
def self.each_strongly_connected_component_from(node, each_child, id_map=nil, stack=nil) # :yields: nodes
return to_enum(__method__, node, each_child, id_map, stack) unless block_given?

id_map ||= {}
stack ||= []

minimum_id = node_id = id_map[node] = id_map.size
stack_length = stack.length
stack << node
Expand Down