PHP Compiler Testing
Transform into a List with No Duplicates

A set is a collection of unique items. A set can be formed from a list by removing all duplicate items.

[1, 3, 3, 5, 5, 5]

# original list

 

[1, 3, 5]

# original list transformed into a set

Create a function that sorts a list and removes all duplicate items from it.

Examples

setify([1, 3, 3, 5, 5]) ➞ [1, 3, 5]

 

setify([4, 4, 4, 4]) ➞ [4]

 

setify([5, 7, 8, 9, 10, 15]) ➞ [5, 7, 8, 9, 10, 15]

 

setify([3, 3, 3, 2, 1]) ➞ [1, 2, 3]