Array#freeze

() -> self

freeze → self

VALUE
rb_ary_freeze(VALUE ary)
{
    RUBY_ASSERT(RB_TYPE_P(ary, T_ARRAY));

    if (OBJ_FROZEN(ary)) return ary;

    if (!ARY_EMBED_P(ary) && !ARY_SHARED_P(ary) && !ARY_SHARED_ROOT_P(ary)) {
        ary_shrink_capa(ary);
    }

    return rb_obj_freeze(ary);
}

Freezes self (if not already frozen); returns self:

Example

a = []
a.frozen? # => false
a.freeze
a.frozen? # => true

No further changes may be made to self; raises FrozenError if a change is attempted.

Related: Kernel#frozen?.

See also #flatten! #hash #flatten #include? also in 4.1 · 4.0

‹ prev#flatten! next ›#hash