End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Range#size

rng.size → num

static VALUE
range_size(VALUE range)
{
    VALUE b = RANGE_BEG(range), e = RANGE_END(range);
    if (rb_obj_is_kind_of(b, rb_cNumeric)) {
        if (rb_obj_is_kind_of(e, rb_cNumeric)) {
            return ruby_num_interval_step_size(b, e, INT2FIX(1), EXCL(range));
        }
        if (NIL_P(e)) {
            return DBL2NUM(HUGE_VAL);
        }
    }
    else if (NIL_P(b)) {
        return DBL2NUM(HUGE_VAL);
    }

    return Qnil;
}

Returns the number of elements in the range. Both the begin and the end of the Range must be Numeric, otherwise nil is returned.

Example

(10..20).size    #=> 11
('a'..'z').size  #=> nil
(-Float::INFINITY..Float::INFINITY).size #=> Infinity

See also #minmax #step #min #to_a also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1

‹ prev#minmax next ›#step