method

<=>

v1_9_3_392 - Show latest stable - 0 notes - Class: Float

<=>(p1) public

Returns -1, 0, +1 or nil depending on whether flt is less than, equal to, or greater than real. This is the basis for the tests in Comparable.

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static VALUE
flo_cmp(VALUE x, VALUE y)
{
    double a, b;
    VALUE i;

    a = RFLOAT_VALUE(x);
    if (isnan(a)) return Qnil;
    switch (TYPE(y)) {
      case T_FIXNUM:
        b = (double)FIX2LONG(y);
        break;

      case T_BIGNUM:
        if (isinf(a)) {
            if (a > 0.0) return INT2FIX(1);
            else return INT2FIX(-1);
        }
        b = rb_big2dbl(y);
        break;

      case T_FLOAT:
        b = RFLOAT_VALUE(y);
        break;

      default:
        if (isinf(a) && (i = rb_check_funcall(y, rb_intern("infinite?"), 0, 0)) != Qundef) {
            if (RTEST(i)) {
                int j = rb_cmpint(i, x, y);
                j = (a > 0.0) ? (j > 0 ? 0 : +1) : (j < 0 ? 0 : -1);
                return INT2FIX(j);
            }
            if (a > 0.0) return INT2FIX(1);
            return INT2FIX(-1);
        }
        return rb_num_coerce_cmp(x, y, rb_intern("<=>"));
    }
    return rb_dbl_cmp(a, b);
}

<=>

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