Ruby Convert List to Set

1. Introduction

In Ruby, converting a list (an array in Ruby terminology) to a set is a straightforward task but an important one, especially when you need to ensure that a collection contains no duplicates and you want to increase the efficiency of lookups. Sets are collections of unordered, unique items, which is a feature not provided by arrays. This blog post will cover the conversion process from a list to a set in Ruby.

2. Program Steps

1. Ensure the Set library is available.

2. Define the list (array) to be converted.

3. Convert the array to a set using the Set class.

4. Output the resulting set.

3. Code Program

# Step 1: Require the Set library
require 'set'
# Step 2: Define the list (array) to be converted
list = [1, 2, 2, 3, 4, 4, 4, 5]
# Step 3: Convert the array to a set
set = Set.new(list)
# The set now contains the unique elements from the list

Output:

#

Explanation:

1. require 'set' makes the Set class available for use.

2. list is the array that contains potentially duplicate elements that we want to convert into a set.

3. Set.new(list) is the method used to create a new set from the array. This new set contains all the unique elements from the list.

4. The resulting set is output, which shows the unique elements from the original list without any duplicates.