Kernel#frozen?

() -> bool

obj.frozen? → true or false

# File tmp/rubies/ruby-3.4.1/kernel.rb, line 67
def frozen?
  Primitive.attr! :leaf
  Primitive.cexpr! 'rb_obj_frozen_p(self)'
end

Returns the freeze status of obj.

Example

a = [ "a", "b", "c" ]
a.freeze    #=> ["a", "b", "c"]
a.frozen?   #=> true

See also #format #gem #fork #gets also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0