HIGHER ORDER FUNCTIONS
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| Always go high |
This blog contains :
1. What is Higher order functions?
2. How many higher order functions are in Swift.?
3. Why we use it?
So, Let's get started:
1. What is Higher order function?
Higher order functions are simply functions that operate on other functions by either taking a function as an argument, or returning a function.
In Mathematics and computer science, a Higher order function is a function that does at least one of the following:
1. Take one or more functions as argument..
2. Returns a function as its result.
2. How many higher order functions are in Swift?
Actually there is no fixed number of Higher order functions. But yes I am going to describe some of them which is very useful and often we use in our logic's.
- map
- compactMap
- flatMap
- filter
- reduce
- forEach
- contains
- removeAll
- sorted
- split
Lets Describe one by one:
Map
Map is most commonly used function. which is mainly used when you want to apply the same operation to each element of a collection.
Example:
CompactMap
A compactMap is preety much similar to map but the difference is only compactMap does not contains nil in array.
Example:
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