Add Selection Sort in Ruby

archive/r/ruby/selection-sort.rb

@@ -0,0 +1,34 @@
+def selection_sort(numbers)
+  # Handle missing or invalid input
+  if numbers.nil? || numbers.strip.empty?
+    return 'Usage: please provide a list of at least two integers to sort in the format "1, 2, 3, 4, 5"'
+  end
+
+  # Split into an array and convert to integers
+  unsorted_elements = numbers.split(',').map(&:strip).map(&:to_i)
+
+  # Validate array has at least 2 elements
+  if unsorted_elements.length < 2
+    return 'Usage: please provide a list of at least two integers to sort in the format "1, 2, 3, 4, 5"'
+  end
+
+  # Make an array to store the sorted elements
+  sorted_elements = []
+
+  # Iterate until the list of unsorted elements is emptu
+  until unsorted_elements.empty?
+    # Store the minimal value in a variable
+    min_element = unsorted_elements.min
+
+    # Add the element at the end of the sorted elements array
+    sorted_elements.push(min_element)
+
+    # Delete the minimal value from the unsorted elements array
+    unsorted_elements.delete_at(unsorted_elements.index(min_element))
+  end
+
+  # Return as comma-separated string
+  sorted_elements.join(', ')
+end
+
+puts selection_sort(ARGV[0])