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sort-by



    function
    boot.janet on line 822, column 1

    (sort-by f ind)

    Returns `ind` sorted by calling a function `f` on each element and 
    comparing the result with `<`.

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(sort-by
  (fn [x] (get x :b))
   @[{:a 1 :b 100} {:a 100 :b 1} {:a -1 :b 50}])

# -> @[{:a 100 :b 1} {:a -1 :b 50} {:a 1 :b 100}]

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