ZRem

删除指定成员key在一个指定的有序集合bucket中。

  1. if err := db.Update(
  2.     func(tx *nutsdb.Tx) error {
  3.         bucket := "myZSet5"
  4.         key1 := []byte("key1")
  5.         return tx.ZAdd(bucket, key1, 10, []byte("val1"))
  6.     }); err != nil {
  7.     log.Fatal(err)
  8. }
  10. if err := db.Update(
  11.     func(tx *nutsdb.Tx) error {
  12.         bucket := "myZSet5"
  13.         key2 := []byte("key2")
  14.         return tx.ZAdd(bucket, key2, 20, []byte("val2"))
  15.     }); err != nil {
  16.     log.Fatal(err)
  17. }
  19. if err := db.View(
  20.     func(tx *nutsdb.Tx) error {
  21.         bucket := "myZSet5"
  22.         if nodes,err := tx.ZMembers(bucket); err != nil {
  23.             return err
  24.         } else {
  25.             fmt.Println("before ZRem key1, ZMembers nodes",nodes)
  26.             for _,node:=range nodes {
  27.                 fmt.Println("item:",node.Key(),node.Score())
  28.             }
  29.         }
  30.         // before ZRem key1, ZMembers nodes map[key1:0xc00008cfa0 key2:0xc00008d090]
  31.         // item: key1 10
  32.         // item: key2 20
  33.         return nil
  34.     }); err != nil {
  35.     log.Fatal(err)
  36. }
  38. if err := db.Update(
  39.     func(tx *nutsdb.Tx) error {
  40.         bucket := "myZSet5"
  41.         if err := tx.ZRem(bucket, "key1"); err != nil {
  42.             return err
  43.         }
  44.         return nil
  45.     }); err != nil {
  46.     log.Fatal(err)
  47. }
  49. if err := db.View(
  50.     func(tx *nutsdb.Tx) error {
  51.         bucket := "myZSet5"
  52.         if nodes,err := tx.ZMembers(bucket); err != nil {
  53.             return err
  54.         } else {
  55.             fmt.Println("after ZRem key1, ZMembers nodes",nodes)
  56.             for _,node:=range nodes {
  57.                 fmt.Println("item:",node.Key(),node.Score())
  58.             }
  59.             // after ZRem key1, ZMembers nodes map[key2:0xc00008d090]
  60.             // item: key2 20
  61.         }
  62.         return nil
  63.     }); err != nil {
  64.     log.Fatal(err)
  65. }