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nathanmarz/gist:6333a50c67ec9031e5ee

Last active August 29, 2015 14:23
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New if-path selector in Specter
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gistfile1.clj
;; For every map, if value for :a is even, increment :b's value. Otherwise, increment all values.
(update [ALL (if-path [:a even?] :b [ALL LAST])]
inc
[{:a 2 :b 3 :c 4}
{:a 1 :b 10 :d 5 :e 6}
{:a 2 :b 0}
{:a -1 :f 100}])
==>
[{:c 4, :b 4, :a 2}
{:e 7, :b 11, :d 6, :a 2}
{:b 1, :a 2}
{:f 101, :a 0}]
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