33 lines
776 B
Ruby
33 lines
776 B
Ruby
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class Object
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def scan_iter
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case self
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when ::Array
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length.times { |i| yield self[i], "[#{i}]" }
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when ::Hash
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each { |k, v| yield v, "[#{k.inspect}]" ; yield k, "(key)" }
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else
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instance_variables.each { |i| yield instance_variable_get(i), ".#{i[1..-1]}" }
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end
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end
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# dumps to stdout the path to find some targets ( array of objects to match with == )
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def scan_for(targets, path, done={})
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done[object_id] = self if done.empty?
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if t = targets.find { |t_| self == t_ }
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puts "found #{t} at #{path}"
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end
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scan_iter { |v, p|
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case v
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when Fixnum, Symbol; next
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end
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p = path+p
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if done[v.object_id]
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puts "loop #{p} -> #{done[v.object_id]}" if $VERBOSE
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else
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done[v.object_id] = p
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v.scan_for(targets, p, done)
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end
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}
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end
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end
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