Class: Object

Inherits:
BasicObject
Defined in:
lib/ruby_ext.rb,
lib/more/typecast.rb

Instance Method Summary collapse

Instance Method Details

#cast_from(object) ⇒ Object

Cast on object from another

String.cast_from(1234) => "1234"

Raises:



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# File 'lib/more/typecast.rb', line 121

def cast_from(object)
  method_to = "to_#{self.name.methodize}".to_sym
  if object.respond_to? method_to
    retval = object.send(method_to)
    return retval
  end

  method_from = "from_#{object.class.name.methodize}".to_sym
  if respond_to? method_from
    retval = send(method_from, object)
    return retval
  end

  raise TypeCastException, "TypeCasting from #{object.class.name} to #{self.name} not supported"
end

#cast_to(klass) ⇒ Object

Cast an object to another

1234.cast_to(String)  => "1234"



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# File 'lib/more/typecast.rb', line 113

def cast_to(klass)
  klass.cast_from(self)
end

#extend_once(*mods) ⇒ Object

Does what its name says



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# File 'lib/ruby_ext.rb', line 81

def extend_once(*mods)
  mods.each do |mod|
    extend mod unless metaclass.ancestors.include? mod
  end
end

#include_once(*mods) ⇒ Object

Does what its name says



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# File 'lib/ruby_ext.rb', line 88

def include_once(*mods)
  mods.each do |mod|
    include mod unless ancestors.include? mod
  end
end

#instance_variables_send(obj, force = false) ⇒ Object Also known as: ivs_send

Sets all instance variables of an object to another

if force is set to true, existing instance variables will be overwritten



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# File 'lib/ruby_ext.rb', line 70

def instance_variables_send(obj, force=false)
  instance_variables.each do |v|
    if force or not obj.instance_variables.include? v
      obj.instance_variable_set(v, instance_variable_get(v))
    end
  end
  obj
end