73 lines
1.2 KiB
Go
73 lines
1.2 KiB
Go
package main
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type TreeNode interface {
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Left() TreeNode
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Right() TreeNode
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}
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type BTreeNode struct {
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left TreeNode
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right TreeNode
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}
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type StringyBTreeNode struct {
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k string
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v interface{}
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BTreeNode
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}
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func NewStringyBTree(k string, v interface{}) *StringyBTreeNode {
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return &StringyBTreeNode{
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k: k,
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v: v,
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}
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}
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func (sbt *StringyBTreeNode) Left() TreeNode {
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return sbt.left
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}
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func (sbt *StringyBTreeNode) Right() TreeNode {
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return sbt.right
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}
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func (sbt *StringyBTreeNode) Insert(k string, v interface{}) *StringyBTreeNode {
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if sbt.k == k {
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sbt.v = v // set new value
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return sbt
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}
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newNode := &StringyBTreeNode{k: k, v: v}
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if sbt.k > k {
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if sbt.left == nil {
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sbt.left = newNode
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} else {
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sbt.left.(*StringyBTreeNode).Insert(k, v)
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}
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}
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if sbt.k < k {
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if sbt.right == nil {
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sbt.right = newNode
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} else {
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sbt.right.(*StringyBTreeNode).Insert(k, v)
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}
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}
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return sbt
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}
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func (sbt *StringyBTreeNode) Get(k string) interface{} {
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if sbt.k == k {
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return sbt.v
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}
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if sbt.k > k {
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if sbt.left != nil {
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return sbt.left.(*StringyBTreeNode).Get(k)
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}
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}
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if sbt.k < k {
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if sbt.right != nil {
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return sbt.right.(*StringyBTreeNode).Get(k)
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}
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}
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return nil // not found
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}
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