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dd7d30017c
Some comments in the file are formatted automatically into ugly style, because the hierarchical structure is missing. After removing the leading numbers in the comments, `go fmt` will not format the comments anymore. Signed-off-by: Benjamin Wang <wachao@vmware.com>
Red-Black Tree
"Introduction to Algorithms" (Cormen et al, 3rd ed.), Chapter 13
- Every node is either red or black.
- The root is black.
- Every leaf (NIL) is black.
- If a node is red, then both its children are black.
- For each node, all simple paths from the node to descendant leaves contain the same number of black nodes.
For example,
import (
"fmt"
"go.etcd.io/etcd/pkg/v3/adt"
)
func main() {
ivt := adt.NewIntervalTree()
ivt.Insert(NewInt64Interval(510, 511), 0)
ivt.Insert(NewInt64Interval(82, 83), 0)
ivt.Insert(NewInt64Interval(830, 831), 0)
...
After inserting the values 510, 82, 830, 11, 383, 647, 899, 261, 410, 514, 815, 888, 972, 238, 292, 953.
Deleting the node 514 should not trigger any rebalancing:
Deleting the node 11 triggers multiple rotates for rebalancing:
Try yourself at https://www.cs.usfca.edu/~galles/visualization/RedBlack.html.