Modify below code using Dependency Injection.

1.	Modify below code using Dependency Injection.
Answer» 35 Higher order functions are simply functions that can EITHER accept functions or closures as arguments or return a function/closure. Higher Order Functions are very useful and powerful and help us to write more elegantly and maintainable code. Those functions are Map, Filter, Reduce, Sort, CompactMap etc. let result = [listOne.compactMap({ $0}),listTwo.compactMap({ $0})].flatMap({ $0}).reduce(0) { $0 + $1 } First compact map removes NIL ELEMENT from the array. Then by using a flat map, we COMBINE these two arrays. And finally, reduce function will help to get the sum of array elements.

Answer»

Higher order functions are simply functions that can EITHER accept functions or closures as arguments or return a function/closure.

Higher Order Functions are very useful and powerful and help us to write more elegantly and maintainable code. Those functions are Map, Filter, Reduce, Sort, CompactMap etc.

let result = [listOne.compactMap({ $0}),listTwo.compactMap({ $0})].flatMap({ $0}).reduce(0) { $0 + $1 }

First compact map removes NIL ELEMENT from the array. Then by using a flat map, we COMBINE these two arrays.

And finally, reduce function will help to get the sum of array elements.

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