Seq.sumBy<'T,^U> Function (F#)
Returns the sum of the results generated by applying the function to each element of the sequence.
Namespace/Module Path: Microsoft.FSharp.Collections.Seq
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature: Seq.sumBy : ('T -> ^U) -> seq<'T> -> ^U (requires ^U with static member (+) and ^U with static member Zero) // Usage: Seq.sumBy projection source