Ruby | Array one?() function

Ruby | Array none?() function

Last Updated : 06 Dec, 2019

Array#none?() : none?() is a Array class method which checks whether the array is empty or not.

Syntax: Array.none?() Parameter: Array Return: true - if array has no elements otherwise return false

Example #1 :

Ruby

# Ruby code for none?() method

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

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

# declaring array
c = []

# none? method example
puts "none?() method form : #{a.none?()}\n\n"

puts "none?() method form : #{b.none?()}\n\n"

puts "none?() method form : #{c.none?()}\n\n"

Output :

none?() method form : false

none?() method form : false

none?() method form : true

Example #2 :

Ruby

# Ruby code for none?() method

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

# declaring array
c = [nil]

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


# none? method example
puts "none?() method form : #{a.none?()}\n\n"

puts "none?() method form : #{b.none?()}\n\n"

puts "none?() method form : #{c.none?()}\n\n"

Output :

none?() method form : false

none?() method form : false

none?() method form : true

Ruby | Array one?() function

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