addAndAss method

MathFract addAndAss(
  1. dynamic r
)

Implementation

MathFract addAndAss( dynamic r ){
	if( r is MathFract ){
		if( _mi != r._mi ){
			// this -= -r
			subAndAss( r.minus() );
		} else if( _de == 0 ){
		} else if( r._de == 0 ){
			ass( r );
		} else {
			double de = ClipMath.lcm( _de, r._de );
			_set( _nu * de / _de + r._nu * de / r._de, de );
		}
	} else {
		double rr = ClipMath.toDouble(r);
		if( _mi != (rr < 0.0) ){
			// this -= -rr
			subAndAss( -rr );
		} else {
			double t = (rr < 0.0) ? -rr : rr;
			if( t == ClipMath.toInt( t ) ){
				_set( _nu + t * _de, _de );
			} else {
				addAndAss( floatToFract( rr ) );
			}
		}
	}
	return this;
}