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presence_methods

✅ Check for Presence with present? and blank?​

Instead of testing nil or empty strings/arrays manually, use present? to assert the presence of a value and blank? to catch nil, empty, or whitespace-only strings. This simplifies guard clauses.

"".blank?         # => true
"   ".blank?      # => true
[1,2].present?     # => true
nil.present?       # => false