Class: NilClass

Inherits:
Object show all
Defined in:
lib/core/facets/boolean.rb,
lib/core/facets/kernel/try.rb,
lib/core/facets/object/dup.rb,
lib/core/facets/kernel/ergo.rb,
lib/core/facets/kernel/blank.rb,
lib/standard/facets/ostruct/to_ostruct.rb

Constant Summary collapse

FUNCTOR = 
Functor.new{ nil }

Instance Method Summary collapse

Instance Method Details

#blank? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/core/facets/kernel/blank.rb', line 44

def blank?
  true
end

#clone? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/core/facets/object/dup.rb', line 12

def clone? ; false ; end

#dup? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/core/facets/object/dup.rb', line 11

def dup?   ; false ; end

#ergo ⇒ Object

Compliments Kernel#ergo.

"a".ergo{ |o| o.upcase } #=> "A"
nil.ergo{ |o| o.bar }    #=> nil

CREDIT: Daniel DeLorme



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# File 'lib/core/facets/kernel/ergo.rb', line 38

def ergo
  FUNCTOR unless block_given?
end

#to_bool ⇒ Object 



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# File 'lib/core/facets/boolean.rb', line 51

def to_bool
  false
end

#to_ostruct ⇒ Object

Create an empty OpenStruct object.



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# File 'lib/standard/facets/ostruct/to_ostruct.rb', line 62

def to_ostruct
  OpenStruct.new
end

#try(method = nil, *args, &block) ⇒ Object

See Kernel#try.



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# File 'lib/core/facets/kernel/try.rb', line 47

def try(method=nil, *args, &block)
  if method
    nil
  elsif block_given?
    nil
  else
    Functor.new { nil }
  end
end

#try!(method = nil, *args, &block) ⇒ Object

See Kernel#try!.



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# File 'lib/core/facets/kernel/try.rb', line 58

def try!(method=nil, *args, &block)
  if method
    nil
  elsif block_given?
    nil
  else
    Functor.new { nil }
  end
end