Class: Object

Inherits:
BasicObject
Includes:
InstanceExecMethods
Defined in:
lib/ant_support/core_ext/blank.rb,
lib/ant_support/core_ext/duplicable.rb,
lib/ant_support/core_ext/object/extending.rb

Defined Under Namespace

Modules: InstanceExecMethods

Instance Method Summary collapse

Instance Method Details

#blank? ⇒ Boolean

An object is blank if it’s false, empty, or a whitespace string. For example, “”, “ ”, nil, [], and {} are blank.

This simplifies

if !address.nil? && !address.empty?

to

if !address.blank?

Returns:

  • (Boolean) 


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# File 'lib/ant_support/core_ext/blank.rb', line 12

def blank?
  respond_to?(:empty?) ? empty? : !self
end

#duplicable? ⇒ Boolean

Can you safely .dup this object? False for nil, false, true, symbols, and numbers; true otherwise.

Returns:

  • (Boolean) 


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# File 'lib/ant_support/core_ext/duplicable.rb', line 4

def duplicable?
  true
end

#extend_with_included_modules_from(object) ⇒ Object

:nodoc:



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# File 'lib/ant_support/core_ext/object/extending.rb', line 50

def extend_with_included_modules_from(object) #:nodoc:
  object.extended_by.each { |mod| extend mod }
end

#extended_by ⇒ Object

:nodoc:



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# File 'lib/ant_support/core_ext/object/extending.rb', line 45

def extended_by #:nodoc:
  ancestors = class << self; ancestors end
  ancestors.select { |mod| mod.class == Module } - [ Object, Kernel ]
end

#instance_exec(*args, &block) ⇒ Object

Evaluate the block with the given arguments within the context of this object, so self is set to the method receiver.

From Mauricio’s eigenclass.org/hiki/bounded+space+instance_exec



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# File 'lib/ant_support/core_ext/object/extending.rb', line 63

def instance_exec(*args, &block)
  begin
    old_critical, Thread.critical = Thread.critical, true
    n = 0
    n += 1 while respond_to?(method_name = "__instance_exec#{n}")
    InstanceExecMethods.module_eval { define_method(method_name, &block) }
  ensure
    Thread.critical = old_critical
  end

  begin
    send(method_name, *args)
  ensure
    InstanceExecMethods.module_eval { remove_method(method_name) } rescue nil
  end
end

#present? ⇒ Boolean

An object is present if it’s not blank.

Returns:

  • (Boolean) 


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# File 'lib/ant_support/core_ext/blank.rb', line 17

def present?
  !blank?
end

#remove_subclasses_of(*superclasses) ⇒ Object

:nodoc:



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# File 'lib/ant_support/core_ext/object/extending.rb', line 2

def remove_subclasses_of(*superclasses) #:nodoc:
  Class.remove_class(*subclasses_of(*superclasses))
end