Class: Object

Inherits:
BasicObject
Defined in:
lib/justools/core_ext/object.rb

Instance Method Summary collapse

Instance Method Details

#and_also(&block) ⇒ Object

Examples

authorization = User.find_by_id(10).and_also { |u| u.authorization }



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# File 'lib/justools/core_ext/object.rb', line 28

def and_also(&block)
  self && yield(self)
end

#as {|_self| ... } ⇒ Object

Examples

{ :a=>1, .., :z=>26 }.as { |h| h.each { |k, v| h[k] = v + h[26 - v] } }

User.find(15).stories.joins(:tasks).as { |s| [s.class.to_s, s.count] }.
     as { |klass_name, count| "#{count} stories in #{klass_name}" }

[15, { :includes => { :stories => :tasks } }, 56, 78, 102].
     as { |id, opts, *ns| ns.each { |n| puts n }; User.find(id, opts) }

Yields:

  • (_self)

Yield Parameters:

  • _self (Object) —

    the object that the method was called on



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# File 'lib/justools/core_ext/object.rb', line 14

def as(&block)
  yield self
end

#in?(*args) ⇒ Boolean Also known as: is_included_in?

Copy of Object#in? from Rails 3.2.1 which also allows list.

Parameters

  • args - Array or a list of its contents.

Returns:

  • (Boolean) 


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# File 'lib/justools/core_ext/object.rb', line 38

def in?(*args)
  if args.length > 1
    args.include? self
  else
    another_object = args.first
    if another_object.respond_to? :include?
      another_object.include?(self)
    else
      raise ArgumentError.new("The single parameter passed to #in? must respond to #include?")
    end
  end
end

#one_kind_of?(*klasses) ⇒ Boolean Also known as: is_one_kind_of?

Similar to is_a? or kind_of? but with an array of possible classes. Returns the matching class or a nil.

Parameters

  • klasses - List of Class constants, or an Array of Class constants.

Examples

rec_or_num.one_kind_of?(User, Admin).or_else { User.find(rec_or_num) }

Returns:

  • (Boolean) 


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# File 'lib/justools/core_ext/object.rb', line 71

def one_kind_of?(*klasses)
  klasses.flatten_splat.detect { |klass| self.kind_of?(klass) }
end

#one_of?(*args) ⇒ Boolean Also known as: is_when?

Similar to is_a? or kind_of? but with an array of possible classes. Returns the matching class or a nil. Renamed here from is_one_kind_of? because it uses the ‘klass === self’ which isn’t necessarily equivalent to ‘self.is_a?(klass)’.

Parameters

  • args - List of arguments.

Examples

rec_or_num.one_of?(User, Admin).or_else { User.find(rec_or_num) }

Returns:

  • (Boolean) 


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# File 'lib/justools/core_ext/object.rb', line 88

def one_of?(*args)
  args.flatten_splat.detect { |arg| arg === self}
end

#or_else(&block) ⇒ Object

Examples

user = User.find_by_id(10).or_else { |res| raise "Got back #{res}" }



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# File 'lib/justools/core_ext/object.rb', line 21

def or_else(&block)
  self || yield(self)
end

#out_of?(*others) ⇒ Boolean Also known as: is_excluded_from?

Returns:

  • (Boolean) 


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# File 'lib/justools/core_ext/object.rb', line 56

def out_of?(*others)
  others.flatten_splat.exclude?(self)
end