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minBy(Array<T>, (item: T) -> Comparable): T | Null

Returns the lowest value of comparable elements in a list (an array).

Returns null when list is empty. Returns an error if the items in the array are not comparable.


Name Description


Element in the list (of type Number, Boolean, DateTime, LocalDateTime, Date, LocalTime, Time, or TimeZone). Can be referenced with $.


This example returns the lowest value within objects (key-value pairs) in an array. Notice that it uses item.a to access the value of the object. You can also write the expression in the source like this: [ { "a" : 1 }, { "a" : 3 }, { "a" : 2 } ] minBy $


%dw 2.0
output  application/json
[ { "a" : 1 }, { "a" : 2 }, { "a" : 3 } ] minBy (item) -> item.a


{ "a" : 1 }

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