class Object
Downloaded from raw.githubusercontent.com/rails/rails/v6.1.3.1/activesupport/lib/active_support/core_ext/object/blank.rb Slight modification on +String#blank?+: encoding error means false for simplicity
Public Instance Methods
blank?()
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An object is blank if it's false, empty, or a whitespace string. For example, nil
, '', ' ', [], {}, and false
are all blank.
This simplifies
!address || address.empty?
to
address.blank?
@return [true, false]
# File lib/activesupport/blank.rb, line 20 def blank? respond_to?(:empty?) ? !!empty? : !self end
presence()
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Returns the receiver if it's present otherwise returns nil
. object.presence
is equivalent to
object.present? ? object : nil
For example, something like
state = params[:state] if params[:state].present? country = params[:country] if params[:country].present? region = state || country || 'US'
becomes
region = params[:state].presence || params[:country].presence || 'US'
@return [Object]
# File lib/activesupport/blank.rb, line 47 def presence self if present? end
present?()
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An object is present if it's not blank.
@return [true, false]
# File lib/activesupport/blank.rb, line 27 def present? !blank? end