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tomaszperek/Nil-punning-examples.clj

Last active August 29, 2015 14:22
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Nil-punning-examples.clj
#simple example
=> (if nil "yes" "no")
"no"
# "elvis"
=> (or nil "Some value")
"Some value"
# if-let construct
=> (if-let [a-value (:a a-map)]
(do-something-with-a-value a-value)
"A value not foud")
#
# safe operations on vectors
=> (first [])
nil
=> (first nil)
nil
# safe operations on maps
=> (get-in nil [:a :b])
nil
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