Improve sum & average extensions by not relying on reduce (#225)
Improve sum & average extensions by not relying on reduce (#225)


omaralbeik/SwifterSwift,omaralbeik/SwifterSwift,tache/SwifterSwift,SwifterSwift/SwifterSwift,SwifterSwift/SwifterSwift,LucianoPAlmeida/SwifterSwift,LucianoPAlmeida/SwifterSwift,SwifterSwift/SwifterSwift,tache/SwifterSwift