What is the opposite of Array.path method? or [] is empty? in ruby

Question

I understand what I can do

unless [1].empty? 

But I wonder if there is a way?

Answer 1

Like #any? as mentioned in davidrac, ActiveSupport #present? which is more like a truth test in other languages. For nil , false , '' , {} , [] , etc. It returns false; for everything else true (including 0, interesting).

Answer 2

Can you use [1].any? which is actually defined in Enumerable

Note that this will not work if your array contains only null or false values ​​(thanks for the comment by @InternetSeriousBusiness).

Answer 3

 [nil].any? => false [nil].any? {|something| true} => true [].any? {|something| true} => false [false, false].any? {|something| true} => true [nil, 'g'].any? {|something| true} => true 

Answer 4

Check the elements in the array:
.empty?
.present?

if a = {}
a.any? .nil?
will lead to false.

To check if a field has a value other than zero:

 .present? .nil? .any?