Highorderfunctions in swift
- 1. High Order Functions Ahmet Keskin iOS Developer @trendyol.com
- 2. Closures and functions are first class types in swift Functions and closures are first-class citizens in Swift because you can treat then like a normal value. For example, you can; ❖ Assign a function/closure to a local variable ❖ Pass a function/closure as an argument ❖ Return a function/closure
- 3. Assign a function/closure to a local variable
- 4. Pass a function/closure as an argument
- 6. Lets start with map(_:) Returns an array containing the results of mapping the given closure over the sequence’s elements. Declaration; Parameters; transform -> A mapping closure. transform accepts an element of this sequence as its parameter and returns a transformed value of the same or of a different type. Return Value; An array containing the transformed elements of this sequence.
- 7. Map in Array
- 10. compactMap(_:) Returns an array containing the non-nil results of calling the given transformation with each element of this sequence. Declaration; Parameters; transform -> A closure that accepts an element of this sequence as its argument and returns an optional value. Return Value; An array of the non-nil results of calling transform with each element of the sequence.
- 12. flatMap(_:) Returns the concatenated results of mapping the given transformation over this sequence. Declaration; Discussion; Use this method to receive a single-level sequence when your transformation produces a sequence or collection for each element. Calling flatMap(_:) on a sequence s is equivalent to calling s.map(transform).joined().
- 13. flatMap in Array
- 14. filter(_:) Returns an array containing, in order, the elements of the sequence that satisfy the given predicate. Declaration; Parameters; isIncluded -> A closure that takes an element of the sequence as its argument and returns a Boolean value indicating whether the element should be included in the returned array. Return Value; An array of the elements that isIncluded allowed.
- 15. filter in Array
- 17. sorted(_:) Returns the elements of the sequence, sorted. Declaration; Return Value; A sorted array of the sequence’s elements.
- 18. reduce(_:_:) Returns the result of combining the elements of the sequence using the given closure. Declaration; Return Value; The final accumulated value. If the sequence has no elements, the result is initialResult. Parameters; initialResult -> The value to use as the initial accumulating value. initialResult is passed to nextPartialResult the first time the closure is executed. nextPartialResult -> A closure that combines an accumulating value and an element of the sequence into a new accumulating value, to be used in the next call of the nextPartialResult closure or returned to the caller.
- 20. Dinlediğiniz için teşekkürler Ahmet Keskin iOS Developer @trendyol.com ahmet.keskin@trendyol.com https://github.com/AhmettKeskin https://medium.com/@ahmetkeskin https://twitter.com/_Ahmettkeskin