public override bool Equals(object obj)
{
if (obj.GetType() == typeof(RacketPair))
{
RacketPair other = (RacketPair)obj;
if (this.isNull() && other.isNull())
{
return(true);
}
//one of us is null the other is not
if (this.isNull() || other.isNull())
{
return(false);
}
return(this.value.Equals(other.car()) && this.rest.Equals(other.cdr()));
}
return(base.Equals(obj));
}
public static ObjBox Reverse(RacketPair list)
{
bool restNull = false;
if (list.isNull())
{
return(new ObjBox(list, typeof(RacketPair)));
}
RacketPair accu = new RacketPair(list.car(),
new ObjBox(new RacketPair(), typeof(RacketPair)));
list = (RacketPair)list.cdr().getObj();
while (!list.isNull())
{
accu = new RacketPair(list.car(),
new ObjBox(accu, typeof(RacketPair)));
list = (RacketPair)list.cdr().getObj();
}
return(new ObjBox(accu, typeof(RacketPair)));
}
public static ObjBox Reverse(RacketPair list)
{
bool restNull = false;
if (list.isNull())
return new ObjBox(list, typeof(RacketPair));
RacketPair accu = new RacketPair(list.car(),
new ObjBox(new RacketPair(), typeof(RacketPair)));
list = (RacketPair)list.cdr().getObj();
while (!list.isNull())
{
accu = new RacketPair(list.car(),
new ObjBox(accu, typeof(RacketPair)));
list = (RacketPair)list.cdr().getObj();
}
return new ObjBox(accu, typeof(RacketPair));
}