Arrays contain duplicate elements. Sometimes we want to remove duplicate elements.
There are multiple ways to return unique elements in Ruby Array.
- uniq method
- to_set method
How to return unique elements from an array in Ruby
The first method is using the Array uniq method. Array provides a uniq method that returns an array of elements by removing duplicate elements.
array = [8,1,7,1,5,3,4,8] array = array.uniq puts array
The second way is using the
to_set() method converts Array to Set and, Set stores the unique elements.
to_a method used to convert Set to Array.
array = [8,1,7,1,5,3,4,8] array = array.to_set.to_a puts array
With this, It again takes intermediate storage for storing the set data.
The third way, using the intersection operator (&) in Ruby which returns the array containing elements that are common in multiple arrays.
array = [8,1,7,1,5,3,4,8] array = array & array puts array
8 1 7 5 3 4
Learned multiple ways to remove duplicate elements from an array.
array uniq method is the best way in terms of performance and readability.