Ruby | Array class flatten() function

flatten() is an Array class method which returns flattened array i.e. a 1D array

Syntax: Array.flatten()

Parameter: Array

Return: 1D array

Example #1 :

# Ruby code for flatten() method

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

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


# flatten
puts "flatten : #{a.flatten()}\n\n"

# flatten
puts "flatten : #{b.flatten()}\n\n"

Output :

flatten : [18, 22, 33, nil, 5, 6]

flatten : [1, 4, 1, 1, 88, 9]

Example #2 :

# Ruby code for flatten() method

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

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


# flatten
puts "flatten : #{a.flatten()}\n\n"

# flatten
puts "flatten : #{b.flatten()}\n\n"

Output :

flatten : ["abc", "nil", "dog"]

flatten : ["cow", nil, "dog"]