Golang – 生成具有一对多关系的映射

huangapple
go评论119阅读模式
英文:

Golang - Generate map with one to many relation

问题

我对golang还比较新手，我正在努力从现有的映射中生成一个一对多的关系映射。

这是我的脚本playground

解释：
我试图实现将第0个位置的每个元素与第1个、第2个...第n个位置的每个元素建立关系。

例如 - [0][0]=>[1][0], [0][0]=>[1][1], [0][1]=>[1][0], [0][1]=>[1][1], [0][0]=>[2][0], [0][1]=>[2][1]

我试图实现的最终输出 -

  1. Array(
  2. [0] => Array
  3.     (
  4.         [0] => Array
  5.             (
  6.                 [room_rate_key] => 0|0
  7.                 [amount] => 5307.84
  8.             )
  9.         [1] => Array
  10.             (
  11.                 [room_rate_key] => 0|0
  12.                 [amount] => 5307.84
  13.             )
  14.     )
  15. [1] => Array
  16.     (
  17.         [0] => Array
  18.             (
  19.                 [room_rate_key] => 0|0
  20.                 [amount] => 5307.84
  21.             )
  22.         [1] => Array
  23.             (
  24.                 [room_rate_key] => 0|1
  25.                 [amount] => 5246.98
  26.             )
  27.     )
  28. [2] => Array
  29.     (
  30.         [0] => Array
  31.             (
  32.                 [room_rate_key] => 0|1
  33.                 [amount] => 5246.98
  34.             )
  35.         [1] => Array
  36.             (
  37.                 [room_rate_key] => 0|0
  38.                 [amount] => 5307.84
  39.             )
  40.     )
  41. [3] => Array
  42.     (
  43.         [0] => Array
  44.             (
  45.                 [room_rate_key] => 0|1
  46.                 [amount] => 5246.98
  47.             )
  48.         [1] => Array
  49.             (
  50.                 [room_rate_key] => 0|1
  51.                 [amount] => 5246.98
  52.             )
  53.     )
  54. )
英文:

I am fairly new to golang and I am struggling to generate a one to many relationship map from existing map.

Here is my script playground

Explanation:-
I am trying to achieve the relation of each element of 0th position to each element of 1st,2nd,...nth position.

For example - [0][0]=>[1][0], [0][0]=>[1][1], [0][1]=>[1][0], [0][1]=>[1][1], [0][0]=>[2][0], [0][1]=>[2][1]

Final Output which I am trying to achieve -

  1. Array(
  2. [0] => Array
  3.     (
  4.         [0] => Array
  5.             (
  6.                 [room_rate_key] => 0|0
  7.                 [amount] => 5307.84
  8.             )
  9.         [1] => Array
  10.             (
  11.                 [room_rate_key] => 0|0
  12.                 [amount] => 5307.84
  13.             )
  14.     )
  15. [1] => Array
  16.     (
  17.         [0] => Array
  18.             (
  19.                 [room_rate_key] => 0|0
  20.                 [amount] => 5307.84
  21.             )
  22.         [1] => Array
  23.             (
  24.                 [room_rate_key] => 0|1
  25.                 [amount] => 5246.98
  26.             )
  27.     )
  28. [2] => Array
  29.     (
  30.         [0] => Array
  31.             (
  32.                 [room_rate_key] => 0|1
  33.                 [amount] => 5246.98
  34.             )
  35.         [1] => Array
  36.             (
  37.                 [room_rate_key] => 0|0
  38.                 [amount] => 5307.84
  39.             )
  40.     )
  41. [3] => Array
  42.     (
  43.         [0] => Array
  44.             (
  45.                 [room_rate_key] => 0|1
  46.                 [amount] => 5246.98
  47.             )
  48.         [1] => Array
  49.             (
  50.                 [room_rate_key] => 0|1
  51.                 [amount] => 5246.98
  52.             )
  53.     )
  54. )

答案1

得分: 2

使用一个包含两个值的结构体作为地图的键

使用该结构体作为键进行查找

  1. package main
  3. import "fmt"
  5. type two struct {
  6.     k1 int
  7.     k2 int
  8. }
  10. func main() {
  11.     v := make(map[two]two)
  13.     v[two{1, 1}] = two{37, 38}
  14.     v[two{0, 0}] = two{1, 1}
  16.     fmt.Println(v)
  18. }
英文:

use a struct with two values as the key for the map

to do a lookup use the struct as the key

  1. package main
  3. import "fmt"
  5. type two struct {
  6. 	k1 int
  7. 	k2 int
  8. }
  10. func main() {
  11. 	v := make(map[two]two)
  13. 	v[two{1, 1}] = two{37, 38}
  14. 	v[two{0, 0}] = two{1, 1}
  16. 	fmt.Println(v)
  18. }

huangapple
  • 本文由 发表于 2021年12月1日 22:23:58
  • 转载请务必保留本文链接：https://go.coder-hub.com/70185938.html
  • arrays
  • go
  • go-map
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