func (this *BinarySearchTree) _delete(x *Node, key algorithms.Comparable) *Node {
if x == nil {
return nil
}
cmp := key.CompareTo(x.key)
if cmp < 0 {
x.left = this._delete(x.left, key)
} else if cmp > 0 {
x.right = this._delete(x.right, key)
} else {
if x.right == nil {
return x.left
}
if x.left == nil {
return x.right
}
t := x
x = this.min(t.right)
x.right = this.deleteMin(t.right)
x.left = t.left
}
x.size = this.size(x.left) + this.size(x.right) + 1
return x
}
func (this *BinarySearchTree) RangedSize(low, high algorithms.Comparable) int {
if high.CompareTo(low) < 0 {
return 0
} else if this.Contains(high) {
return this.Rank(high) - this.Rank(low) + 1
} else {
return this.Rank(high) - this.Rank(low)
}
}
func (this *BinarySearchTree) get(x *Node, key algorithms.Comparable) interface{} {
if x == nil {
return nil
}
cmp := key.CompareTo(x.key)
if cmp < 0 {
return this.get(x.left, key)
} else if cmp > 0 {
return this.get(x.right, key)
} else {
return x.val
}
}
func (this *BinarySearchTree) rank(x *Node, key algorithms.Comparable) int {
if x == nil {
return 0
}
cmp := key.CompareTo(x.key)
if cmp < 0 {
return this.rank(x.left, key)
} else if cmp > 0 {
return this.rank(x.right, key) + this.size(x.left) + 1
} else {
return this.size(x.left)
}
}
func (this *BinarySearchTree) keys(x *Node, queue *container.Queue, low, high algorithms.Comparable) {
if x == nil {
return
}
cmplow := low.CompareTo(x.key)
cmphigh := high.CompareTo(x.key)
if cmplow < 0 {
this.keys(x.left, queue, low, high)
}
if cmplow <= 0 && cmphigh >= 0 {
queue.Push(x.key)
}
if cmphigh > 0 {
this.keys(x.right, queue, low, high)
}
}
func (this *BinarySearchTree) set(x *Node, key algorithms.Comparable, val interface{}) *Node {
if x == nil {
return NewNode(key, val, 1)
}
cmp := key.CompareTo(x.key)
if cmp < 0 {
x.left = this.set(x.left, key, val)
} else if cmp > 0 {
x.right = this.set(x.right, key, val)
} else {
x.val = val
}
x.size = this.size(x.left) + this.size(x.right) + 1
return x
}
func (this *BinarySearchTree) ceil(x *Node, key algorithms.Comparable) *Node {
if x == nil {
return nil
}
cmp := key.CompareTo(x.key)
if cmp == 0 {
return x
} else if cmp > 0 {
return this.ceil(x.right, key)
} else {
t := this.ceil(x.left, key)
if t != nil {
return t
} else {
return x
}
}
}
func (this *sorter) Less(v, w algorithms.Comparable) bool {
return v.CompareTo(w) < 0
}