Method: Object#freeze

Defined in:
object.c

#freeze ⇒ Object

Prevents further modifications to obj. A TypeError will be raised if modification is attempted. There is no way to unfreeze a frozen object. See also Object#frozen?.

a = [ "a", "b", "c" ]
a.freeze
a << "z"

produces:

prog.rb:3:in `<<': can't modify frozen array (TypeError)
	from prog.rb:3

Returns:



724
725
726
 
# File 'object.c', line 724

VALUE
rb_obj_freeze(obj)
VALUE obj;