An object is blank if it's false, empty, or a whitespace string. For example, ", ' ', nil, [], and {} are all blank.
This simplifies:
if address.nil? || address.empty?
...to:
if address.blank?
# File lib/whois/core_ext/object/blank.rb, line 13 def blank? respond_to?(:empty?) ? empty? : !self end
Returns object if it's present? otherwise returns nil. object.presence is equivalent to object.present? ? object : nil.
This is handy for any representation of objects where blank is the same as not present at all. For example, this simplifies a common check for HTTP POST/query parameters:
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'
# File lib/whois/core_ext/object/blank.rb, line 36 def presence self if present? end
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