instance method

Module#class_variables

(?::boolish inherit) -> ::Array[::Symbol]

mod.class_variables(inherit=true) → array

VALUE
rb_mod_class_variables(int argc, const VALUE *argv, VALUE mod)
{
    bool inherit = true;
    st_table *tbl;

    if (rb_check_arity(argc, 0, 1)) inherit = RTEST(argv[0]);
    if (inherit) {
        tbl = mod_cvar_of(mod, 0);
    }
    else {
        tbl = mod_cvar_at(mod, 0);
    }
    return cvar_list(tbl);
}

Returns an array of the names of class variables in mod. This includes the names of class variables in any included modules, unless the inherit parameter is set to false.

Example

class One
  @@var1 = 1
end
class Two < One
  @@var2 = 2
end
One.class_variables          #=> [:@@var1]
Two.class_variables          #=> [:@@var2, :@@var1]
Two.class_variables(false)   #=> [:@@var2]

See also #class_variable_get #class_variable_set #class_variable_defined? #const_added also in 4.1 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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