mirror of
https://github.com/gonum/gonum.git
synced 2025-10-05 23:26:52 +08:00
94 lines
2.5 KiB
Go
94 lines
2.5 KiB
Go
// Copyright ©2015 The Gonum Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package ordered
|
|
|
|
import "gonum.org/v1/gonum/graph"
|
|
|
|
// ByID implements the sort.Interface sorting a slice of graph.Node
|
|
// by ID.
|
|
type ByID []graph.Node
|
|
|
|
func (n ByID) Len() int { return len(n) }
|
|
func (n ByID) Less(i, j int) bool { return n[i].ID() < n[j].ID() }
|
|
func (n ByID) Swap(i, j int) { n[i], n[j] = n[j], n[i] }
|
|
|
|
// BySliceValues implements the sort.Interface sorting a slice of
|
|
// []int64 lexically by the values of the []int64.
|
|
type BySliceValues [][]int64
|
|
|
|
func (c BySliceValues) Len() int { return len(c) }
|
|
func (c BySliceValues) Less(i, j int) bool {
|
|
a, b := c[i], c[j]
|
|
l := len(a)
|
|
if len(b) < l {
|
|
l = len(b)
|
|
}
|
|
for k, v := range a[:l] {
|
|
if v < b[k] {
|
|
return true
|
|
}
|
|
if v > b[k] {
|
|
return false
|
|
}
|
|
}
|
|
return len(a) < len(b)
|
|
}
|
|
func (c BySliceValues) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
|
|
|
|
// BySliceIDs implements the sort.Interface sorting a slice of
|
|
// []graph.Node lexically by the IDs of the []graph.Node.
|
|
type BySliceIDs [][]graph.Node
|
|
|
|
func (c BySliceIDs) Len() int { return len(c) }
|
|
func (c BySliceIDs) Less(i, j int) bool {
|
|
a, b := c[i], c[j]
|
|
l := len(a)
|
|
if len(b) < l {
|
|
l = len(b)
|
|
}
|
|
for k, v := range a[:l] {
|
|
if v.ID() < b[k].ID() {
|
|
return true
|
|
}
|
|
if v.ID() > b[k].ID() {
|
|
return false
|
|
}
|
|
}
|
|
return len(a) < len(b)
|
|
}
|
|
func (c BySliceIDs) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
|
|
|
|
// Int64s implements the sort.Interface sorting a slice of
|
|
// int64.
|
|
type Int64s []int64
|
|
|
|
func (s Int64s) Len() int { return len(s) }
|
|
func (s Int64s) Less(i, j int) bool { return s[i] < s[j] }
|
|
func (s Int64s) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
|
|
|
|
// Reverse reverses the order of nodes.
|
|
func Reverse(nodes []graph.Node) {
|
|
for i, j := 0, len(nodes)-1; i < j; i, j = i+1, j-1 {
|
|
nodes[i], nodes[j] = nodes[j], nodes[i]
|
|
}
|
|
}
|
|
|
|
// LinesByIDs implements the sort.Interface sorting a slice of graph.LinesByIDs
|
|
// lexically by the From IDs, then by the To IDs, finally by the Line IDs.
|
|
type LinesByIDs []graph.Line
|
|
|
|
func (n LinesByIDs) Len() int { return len(n) }
|
|
func (n LinesByIDs) Less(i, j int) bool {
|
|
a, b := n[i], n[j]
|
|
if a.From().ID() != b.From().ID() {
|
|
return a.From().ID() < b.From().ID()
|
|
}
|
|
if a.To().ID() != b.To().ID() {
|
|
return a.To().ID() < b.To().ID()
|
|
}
|
|
return n[i].ID() < n[j].ID()
|
|
}
|
|
func (n LinesByIDs) Swap(i, j int) { n[i], n[j] = n[j], n[i] }
|