Pascal Honoré 4d4cb3b93a First encounter with nil ... In 02_strings.clj, the answer to (= __ (string/index-of "hello world" "bob")) is `nil` but `nil` is not obvious for somebody who never saw it before. This step introduces it.		2016-03-25 18:12:04 +00:00
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koans	First encounter with nil	2016-03-25 18:12:04 +00:00