public static HashMap <A, HashMap <B, T> > Remove <A, B, T>(this HashMap <A, HashMap <B, T> > self, A outerKey,
B innerKey)
{
var b = self.Find(outerKey);
if (b.IsSome)
{
var bv = b.Value.Remove(innerKey);
if (bv.Count() == 0)
{
return(self.Remove(outerKey));
}
else
{
return(self.SetItem(outerKey, bv));
}
}
else
{
return(self);
}
}
public static HashMap <A, HashMap <B, HashMap <C, T> > > Remove <A, B, C, T>(
this HashMap <A, HashMap <B, HashMap <C, T> > > self, A aKey, B bKey, C cKey)
{
var b = self.Find(aKey);
if (b.IsSome)
{
var c = b.Value.Find(bKey);
if (c.IsSome)
{
var cv = c.Value.Remove(cKey);
if (cv.Count() == 0)
{
var bv = b.Value.Remove(bKey);
if (b.Value.Count() == 0)
{
return(self.Remove(aKey));
}
else
{
return(self.SetItem(aKey, bv));
}
}
else
{
return(self.SetItem(aKey, b.Value.SetItem(bKey, cv)));
}
}
else
{
return(self);
}
}
else
{
return(self);
}
}
