Ruby | Array repeated_combination() function

Array#repeated_combination() : repeated_combination() is a Array class method which returns all repeated combinations of length n of elements from the array and then returns the array itself.

Syntax: Array.repeated_combination()

Parameter: Array

Return: all repeated combinations of length n of elements from the array and then returns the array itself.f.

Example #1 :

# Ruby code for repeated_combination() method

# declaring array
a = [18, 22, 33, nil, 5, 6]

# declaring array
b = [1, 4, 1, 1, 88, 9]

# declaring array
c = []

# repeated_combination method example
puts "repeated_combination() method form :
      #{a.repeated_combination(2).to_a}\n\n"

puts "repeated_combination() method form :
      #{b.repeated_combination(1).to_a}\n\n"

puts "repeated_combination() method form :
      #{c.repeated_combination(4).to_a}\n\n"

Output :

repeated_combination() method form : [[18, 18], [18, 22], [18, 33], [18, nil], [18, 5], [18, 6], [22, 22], [22, 33], [22, nil], [22, 5], [22, 6], [33, 33], [33, nil], [33, 5], [33, 6], [nil, nil], [nil, 5], [nil, 6], [5, 5], [5, 6], [6, 6]]

repeated_combination() method form : [[1], [4], [1], [1], [88], [9]]

repeated_combination() method form : []

Example #2 :

# Ruby code for repeated_combination() method

# declaring array
a = ["abc", "nil", "dog"]

# declaring array
c = [nil]

# declaring array
b = ["cow", nil, "dog"]

# repeated_combination method example
puts "repeated_combination() method form :
     #{a.repeated_combination(2).to_a}\n\n"

puts "repeated_combination() method form :
     #{b.repeated_combination(1).to_a}\n\n"

puts "repeated_combination() method form :
     #{c.repeated_combination(4).to_a}\n\n"

Output :

repeated_combination() method form : [["abc", "abc"], ["abc", "nil"], ["abc", "dog"], ["nil", "nil"], ["nil", "dog"], ["dog", "dog"]]

repeated_combination() method form : [["cow"], [nil], ["dog"]]

repeated_combination() method form : [[nil, nil, nil, nil]]