instance method

Module#constants

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

mod.constants(inherit=true) → array

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

    if (rb_check_arity(argc, 0, 1)) inherit = RTEST(argv[0]);

    if (inherit) {
        return rb_const_list(rb_mod_const_of(mod, 0));
    }
    else {
        return rb_local_constants(mod);
    }
}

Returns an array of the names of the constants accessible in mod. This includes the names of constants in any included modules (example at start of section), unless the inherit parameter is set to false.

The implementation makes no guarantees about the order in which the constants are yielded.

Example

IO.constants.include?(:SYNC)        #=> true
IO.constants(false).include?(:SYNC) #=> false

Also see Module#const_defined?.

See also .constants #const_added #const_defined? #class_variable_set also in 4.1 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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