Array#one?() : one?() is a Array class method which checks whether the array is having only one array element.
Syntax: Array.one?() Parameter: Array Return: true – if array has only one element otherwise return false.
Example #1 :
Ruby
# Ruby code for one?() method # declaring array a = [ 18 , 22 , 33 , nil , 5 , 6 ]
# declaring array b = [ 1 , 4 , 1 , 1 , 88 , 9 ]
# declaring array c = [ 2 ]
# one? method example puts "one?() method form : #{a.one?()}\n\n"
puts "one?() method form : #{b.one?()}\n\n"
puts "one?() method form : #{c.one?()}\n\n"
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Output :
one?() method form : false one?() method form : false one?() method form : true
Example #2 :
Ruby
# Ruby code for one?() method # declaring array a = ["abc", " nil ", "dog"]
# declaring array b = ["cow"] # declaring array c = ["cow", nil , "dog"]
# one? method example puts "one?() method form : #{a.one?()}\n\n"
puts "one?() method form : #{b.one?()}\n\n"
puts "one?() method form : #{c.one?()}\n\n"
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Output :
one?() method form : false one?() method form : false one?() method form : true