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Programming Clojure, Fourth Edition: Fallthough for cond (p. 41, suggestion)

grylix

grylix

Programming Clojure, Fourth Edition: Fallthough for cond (p. 41, suggestion)

On page 41 you write

cond has no default fallthrough expression,

I first thought, that the conditions must be exhaustive (as e.g. in Rust for the match expression or with the new case-statement in Java), but this is not the case in Clojure, so one could say that the default fallthrough expression is nil.

I propose to add a note bevore the above sentence, that cond returns nil is no condition is found which evaluates to true.

The simplest example to demonstrate this would be

user=> (cond)
nil

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