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Updated 22 December 2021
As we have checked in our previous blog, we learned about some higher-order functions in swift.
In this blog, we are going to explore more Higher-Order functions in swift.
If you have not read our previous blog, please do check that blog as well from here.
Let’s start:
forEach will iterate through all elements in an array. And unlike for in you can’t use a break and continue statement to exit from the closure for forEach.
Example:
Output: 1 3 8 5 6
As in our previos blog we have already learned about map, in this blog we will understand the types of map, i.e. compactMap and flatMap
The compactMap(_:) will iterate through all elements in an array and will remove nil values from the input array. It’s basically used when we are working with optionals.
Output: [1, 3, 5, 6]
flatMap converts 2D array to one-dimensional array.
Output: [1, 2, 3, 4, 5, 6, 7, 8, 9]
sort(by:) will sort all elements according to the condition written inside the body of the closure in the same array.
Output: [8, 6, 5, 3 ,1]
sorted(by:) will sort all elements according to the condition written inside the body of the closure and returns a new array.
Output:
numbers: [1, 3, 8, 5, 6]
sortedArray: [8, 6, 5, 3 ,1]
For more understanding of higher-order functions please check here.
For more interesting blogs check out here – https://mobikul.com/blog/.
Thanks for reading 🙂
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