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Goのsortパッケージ

Last updated at Posted at 2020-06-04

sortパッケージ

基本的なソート

Intのスライスを昇順でソートする

items := []int{7, 2, 3, 1, 4, 5, 6}
sort.Ints(items)
fmt.Println(items)

[1 2 3 4 5 6 7]

Intのスライスを降順でソートする

items := []int{7, 2, 3, 1, 4, 5, 6}
sort.Sort(sort.Reverse(sort.IntSlice(items)))
fmt.Println(items)

[7 6 5 4 3 2 1]

Stringのスライスを昇順でソートする

items := []string{"c", "a", "b", "e", "d"}
sort.Strings(items)
fmt.Println(items)

[a b c d e]

Stringのスライスを降順でソートする

items := []string{"c", "a", "b", "e", "d"}
sort.Sort(sort.Reverse(sort.StringSlice(items)))
fmt.Println(items)

[e d c b a]

structのソート

  • スコアの昇順でソート
score := []struct {
    PlayerId int
    Score    int
}{
    {1, 50},
    {2, 20},
    {3, 100},
}
sort.Slice(score, func(i, j int) bool { return score[i].Score < score[j].Score })
fmt.Println(score)

[{2 20} {1 50} {3 100}]
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