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instance method

Module#<

mod < other → true, false, or nil

static VALUE
rb_mod_lt(VALUE mod, VALUE arg)
{
    if (mod == arg) return Qfalse;
    return rb_class_inherited_p(mod, arg);
}

Returns true if mod is a subclass of other. Returns nil if there’s no relationship between the two. (Think of the relationship in terms of the class definition: “class A < B” implies “A < B”.)

See also #<= .used_modules .new #<=> also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.0

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