Class: Object
- Inherits:
- BasicObject
- Defined in:
- lib/dns_one/core_ext/blank.rb
Overview
activesupport-5.1.1/lib/active_support/core_ext/object/blank.rb
Instance Method Summary collapse
-
#blank? ⇒ true, false
An object is blank if it’s false, empty, or a whitespace string.
-
#presence ⇒ Object
Returns the receiver if it’s present otherwise returns
nil
. -
#present? ⇒ true, false
An object is present if it’s not blank.
Instance Method Details
#blank? ⇒ true, false
An object is blank if it’s false, empty, or a whitespace string. For example, false
, ”, ‘ ’, nil
, [], and {} are all blank.
This simplifies
!address || address.empty?
to
address.blank?
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# File 'lib/dns_one/core_ext/blank.rb', line 29 def blank? respond_to?(:empty?) ? !!empty? : !self end |
#presence ⇒ Object
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'
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# File 'lib/dns_one/core_ext/blank.rb', line 56 def presence self if present? end |
#present? ⇒ true, false
An object is present if it’s not blank.
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# File 'lib/dns_one/core_ext/blank.rb', line 36 def present? !blank? end |