Question

I got a situation where I want to process whole array and perform any? operation on array to check whether some elements returns false

For example:
I want to print all truth values. And I also want to check anything is false in array:

def hel? 
  [true, false, true].any?{|x| p x; x}
end

The above example will print only first value (i.e) true and returns true. But I want it to print all elements of array and return false. Is there some other way to do it? or any change in same thing ? Thanks 🙂

Answer 1

To print the values, do this:

[true, false, true].each(&method(:p))

To see if all of them are truthy, do this:

[true, false, true].all?

In order to do both, do this:

[true, false, true].each(&method(:p)).all?

Or, you can put it into one iteration:

[true, false, true].inject(true){|m, n| p(n) && m}