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- def test_method(a, b)
- (a[0] == b[0] ? 0 : 1) + test_method(a[1..-1], b[1..-1])
- end
- 'ss'[1..-1] => 's'
- 'ss'[1..-1][1..-1] => ""
- 'ss'[1..-1][1..-1][1..-1] => nil
- if not (a.empty? or b.empty?)
- (a[0] == b[0] ? 0 : 1) + test_method(a[1..-1], b[1..-1])
- end
- def test_method(a, b)
- return 0 if a.nil? || b.nil?
- (a[0] == b[0] ? 0 : 1) + test_method(a[1..-1], b[1..-1])
- end
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