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Object

Public Instance Methods

blank?() click to toggle source

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
presence() click to toggle source

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
present?() click to toggle source

An object is present if it's not blank?.

# File lib/whois/core_ext/object/blank.rb, line 18
def present?
  !blank?
end

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