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instance method

Complex#to_r

cmp.to_r → rational

static VALUE
nucomp_to_r(VALUE self)
{
    get_dat1(self);

    if (!k_exact_zero_p(dat->imag)) {
        rb_raise(rb_eRangeError, "can't convert %"PRIsVALUE" into Rational",
                 self);
    }
    return f_to_r(dat->real);
}

Returns the value as a rational if possible (the imaginary part should be exactly zero).

Example

Complex(1, 0).to_r    #=> (1/1)
Complex(1, 0.0).to_r  # RangeError
Complex(1, 2).to_r    # RangeError

See rationalize.

See also #to_json #to_s #to_i also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1

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