I'm developing a "Rails-less" Ruby daemon for automation (although in theory it runs within a Rails directory). For general purposes and the principle of the matter, I would like to find the (most) "native"/common way to utilize a Ruby version of .present?/.blank?/.empty?/.nil? to identify if an array or a (hash) value exists and is not empty (i.e., [] or {}).
From what I've read (e.g., Stack Overflow) and tested, all of these functions appear to be Rails-specific methods, part of ActiveSupport(?).
Coming from other web/interpreter languages (PHP, Python, JS, etc.), this is a general logic function most languages (with arrays, which are most) have this functionality built in one way or another (e.g., PHP's isset( ... ) or JavaScript's .length).
I understand there are RegEx workarounds for .blank?, but .present? seems it would require exception handling to identify if it's "present"). I'm having a hard time believing it doesn't exist, but there's little talk about Ruby without Rails' involvement.
Active Support is broken in small pieces so that you can load just what you need. For .blank? and .present? methods it would be enough to require:
require 'active_support/core_ext/object/blank.rb'
Object#nil? , Array#empty? and Hash#empty? already defined so you dont need anything to require to use those.
Make sure active_support gem installed in your system