Ruby | Enumerable none?() function
Last Updated :
05 Dec, 2019
The none?() of enumerable is an inbuilt method in Ruby returns a boolean value true if none of the objects in the enumerable satisfies the given condition, else it returns false. It compares all the elements with the pattern and returns true if none of them matches with the pattern.
Syntax enu.none? { |obj| block } or enu.none?(pattern)
Parameters: The function takes two types of parameters, one is the object and the block, while the other is the pattern. In case nothing is passed, it assumes to be default object and block which returns true if none of the objects are true or nil.
Return Value: It returns a boolean value.
Example #1:
enu1 = [ 10 , 19 , 18 ]
res1 = enu1.none? { |num| num> 4 }
puts res1
res2 = enu1.none? { |num| num>= 20 }
puts res2
|
Output:
false
true
Example #2:
enu1 = [ 10 , 19 , 20 ]
res1 = enu1.none?( Numeric )
puts res1
enu2 = [ nil , nil ]
res2 = enu2.none?
puts res2
|
Output:
false
true
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