Golang – 如何同时遍历两个切片

huangapple
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英文:

Golang - How to iterate through two slices at the same time

问题

我正在尝试编写一个函数，该函数接受一个结构体作为参数，其中包含两个嵌套的结构体。我需要遍历这两个嵌套的结构体，找到"Service"字段，并删除由"-"分隔的前缀。

我已经编写了一个函数，它可以实现我想要的功能并删除前缀，但是它由两个for循环组成，分别遍历这两个独立的结构体。有没有办法让我以一种方式编写这个函数，使它可以在一个for循环中遍历这两个结构体？

以下是结构体的定义：

  1. var myJson = `
  2. {
  3. 	"ID": "hgfd5432",
  4. 	"Greeting": "Welcome!",
  5. 	"ServiceNames": [
  6. 		{
  7. 		  "Service": "sevice-name-service1",
  8. 		  "Version": "1.8"
  9. 		},
  10. 		{
  11. 		  "Service": "sevice-name-service2",
  12. 		  "Version": "1.8"
  13. 		},
  14. 		{
  15. 		  "Service": "sevice-name-service3",
  16. 		  "Version": "1.9"
  17. 		},
  18. 		{
  19. 		  "Service": "sevice-name-service4",
  20. 		  "Version": "0.6"
  21. 		}
  22. 	  ],
  23. 	  "Services": [
  24. 		{
  25. 		  "Service": "sevice-name-service5",
  26. 		  "Version": "1.8"
  27. 		}
  28. 		],
  29. 	"BusinessUnit": "Unit 1",
  30. 	"Queue": "UK73_Advocacy_PCCT",
  31. 	"Input": "Default",
  32.   }`
  34. type Profile struct {
  35. 	ProfileId     string        `json:"ID"`
  36. 	Input         string        `json:"Input"`
  37. 	ParentProfile string        `json:"ParentProfile"`
  38. 	Persona       string        `json:"Persona"`
  39. 	BusinessUnit  string        `json:"BusinessUnit"`
  40. 	Greeting      string        `json:"Greeting"`
  41. 	Queue         string        `json:"Queue"`
  42. 	ServiceNames  []ServiceKey  `json:"ServiceNames"`
  43. 	Services      []ServiceInfo `json:"Services"`
  44. }

以下是该函数的代码：

  1. func removePrefix(inputParameters *Profile) error {
  2. 	for i := 0; i < len(inputParameters.ServiceNames); i++ {
  3. 		a := strings.Split(inputParameters.ServiceNames[i].Service, "-")
  4. 		s := a[len(a)-1]
  5. 		inputParameters.ServiceNames[i].Service = s
  6. 	}
  8. 	for i := 0; i < len(inputParameters.Services); i++ {
  9. 		a := strings.Split(inputParameters.Services[i].Service, "-")
  10. 		s := a[len(a)-1]
  11. 		inputParameters.Services[i].Service = s
  12. 	}
  13. 	return nil
  14. }

希望对你有所帮助！

英文:

I'm trying to write a function that takes in a struct, and within that there are two nested structs. I need to iterate through both nested structs, find the "Service" field and remove the prefixes that are separated by the '-'.

I've written a function that does what I want it to and removes the prefixes, however it consists of two for loops that loop through the two separate structs. Is their a way for me to write this function in a way that it loops through the structs in one for loop?

Here are the structs:

  1. var myJson = `
  2. {
  3. 	&quot;ID&quot;: &quot;hgfd5432&quot;,
  4. 	&quot;Greeting&quot;: &quot;Welcome!&quot;,
  5. 	&quot;ServiceNames&quot;: [
  6. 		{
  7. 		  &quot;Service&quot;: &quot;sevice-name-service1&quot;,
  8. 		  &quot;Version&quot;: &quot;1.8&quot;
  9. 		},
  10. 		{
  11. 		  &quot;Service&quot;: &quot;sevice-name-service2&quot;,
  12. 		  &quot;Version&quot;: &quot;1.8&quot;
  13. 		},
  14. 		{
  15. 		  &quot;Service&quot;: &quot;sevice-name-service3&quot;,
  16. 		  &quot;Version&quot;: &quot;1.9&quot;
  17. 		},
  18. 		{
  19. 		  &quot;Service&quot;: &quot;sevice-name-service4&quot;,
  20. 		  &quot;Version&quot;: &quot;0.6&quot;
  21. 		}
  22. 	  ],
  23. 	  &quot;Services&quot;: [
  24. 		{
  25. 		  &quot;Service&quot;: &quot;sevice-name-service5&quot;,
  26. 		  &quot;Version&quot;: &quot;1.8&quot;
  27. 		}
  28. 		],
  29. 	&quot;BusinessUnit&quot;: &quot;Unit 1&quot;,
  30. 	&quot;Queue&quot;: &quot;UK73_Advocacy_PCCT&quot;,
  31. 	&quot;Input&quot;: &quot;Default&quot;,
  32.   }`
  34. type Profile struct {
  35. ProfileId     string        `json:&quot;ID&quot;`
  36. Input         string        `json:&quot;Input&quot;`
  37. ParentProfile string        `json:&quot;ParentProfile&quot;`
  38. Persona       string        `json:&quot;Persona&quot;`
  39. BusinessUnit  string        `json:&quot;BusinessUnit&quot;`
  40. Greeting      string        `json:&quot;Greeting&quot;`
  41. Queue         string        `json:&quot;Queue&quot;`
  42. ServiceNames  []ServiceKey  `json:&quot;ServiceNames&quot;`
  43. Services      []ServiceInfo `json:&quot;Services&quot;`

And here is the function:

  1. func removePrefix(inputParameters *Profile) error {
  3. for i := 0; i &lt; len(inputParameters.ServiceNames); i++ {
  4. 	a := strings.Split(inputParameters.ServiceNames[i].Service, &quot;-&quot;)
  5. 	s := a[len(a)-1]
  6. 	inputParameters.ServiceNames[i].Service = s
  7. }
  9. for i := 0; i &lt; len(inputParameters.Services); i++ {
  10. 	a := strings.Split(inputParameters.Services[i].Service, &quot;-&quot;)
  11. 	s := a[len(a)-1]
  12. 	inputParameters.Services[i].Service = s
  13. }
  14. return nil

答案1

得分: 1

你可以这样做：

  1. serviceNamesLength := len(inputParameters.ServiceNames)
  2. servicesLength := len(inputParameters.Services)
  4. maxLength := serviceNamesLength
  5. if servicesLength > maxLength {
  6.     maxLength = servicesLength
  7. }
  9. for i := 0; i < maxLength; i++ {
  10.     if i < servicesLength {
  11.         // 处理服务
  12.     }
  13.     if i < serviceNamesLength {
  14.         // 处理服务名称
  15.     }
  16. }
英文:

One way you can do this is,

  1. serviceNamesLength := len(inputParameters.ServiceNames)
  2. servicesLength := len(inputParameters.Services)
  4. maxLength := serviceNamesLength
  5. if servicesLength &gt; maxLength {
  6.     maxLength = servicesLength
  7. }
  9. for i := 0; i &lt; maxLength; i++ {
  10.     if i &lt; servicesLength {
  11.         // services stuff
  12.     }
  13.     if i &lt; serviceNamesLength {
  14.         // services names stuff
  15.     }
  16. }

答案2

得分: 0

以下是使用并发方式完成此操作的代码：

  1. func ConcurrencyLoop(inputParameters *Profile) {
  3. 	done := make(chan interface{})
  4. 	var wg sync.WaitGroup
  5. 	wg.Add(2)
  7. 	servicesNameChan := TransformServiceNames(done, inputParameters.ServiceNames, &wg)
  8. 	servicesInfoChan := TransformServiceInfo(done, inputParameters.Services, &wg)
  10. 	if servicesName, ok := <-servicesNameChan; ok {
  11. 		inputParameters.ServiceNames = servicesName
  12. 	}
  13. 	if servicesInfo, ok := <-servicesInfoChan; ok {
  14. 		inputParameters.Services = servicesInfo
  15. 	}
  18. 	close(done)
  19. 	wg.Wait()
  21. }
  23. func TransformServiceNames(done <-chan interface{}, servicesKey []ServiceKey, wg *sync.WaitGroup) <-chan []ServiceKey {
  24. 	keysChan := make(chan []ServiceKey)
  25. 	go func() {
  26. 		defer wg.Done()
  27. 		transformedServicekeys := make([]ServiceKey, 0)
  28. 		for _, serviceKey := range servicesKey {
  29. 			a := strings.Split(serviceKey.Service, "-")
  30. 			s := a[len(a)-1]
  31. 			transformedServicekeys = append(transformedServicekeys, ServiceKey{
  32. 				Service: s,
  33. 			})
  34. 		}
  35. 		for {
  36. 			select {
  37. 			case <-done:
  38. 				return
  39. 			case keysChan <- transformedServicekeys:
  40. 			}
  41. 		}
  42. 	}()
  43. 	return keysChan
  44. }
  46. func TransformServiceInfo(done <-chan interface{}, servicesKey []ServiceInfo, wg *sync.WaitGroup) <-chan []ServiceInfo {
  47. 	keysChan := make(chan []ServiceInfo)
  48. 	go func() {
  49. 		defer wg.Done()
  50. 		transformedServiceinfo := make([]ServiceInfo, 0)
  51. 		for _, serviceKey := range servicesKey {
  52. 			a := strings.Split(serviceKey.Service, "-")
  53. 			s := a[len(a)-1]
  54. 			transformedServiceinfo = append(transformedServiceinfo, ServiceInfo{
  55. 				Service: s,
  56. 			})
  57. 		}
  58. 		for {
  59. 			select {
  60. 			case <-done:
  61. 				return
  62. 			case keysChan <- transformedServiceinfo:
  63. 			}
  64. 		}
  65. 	}()
  66. 	return keysChan
  67. }
英文:

here's how you can do this,by using concurrency:

  1. func ConcurrencyLoop(inputParameters *Profile) {
  3. 	done := make(chan interface{})
  4. 	var wg sync.WaitGroup
  5. 	wg.Add(2)
  7. 	servicesNameChan := TransformServiceNames(done, inputParameters.ServiceNames, &amp;wg)
  8. 	servicesInfoChan := TransformServiceInfo(done, inputParameters.Services, &amp;wg)
  10. 	if servicesName, ok := &lt;-servicesNameChan; ok {
  11. 		inputParameters.ServiceNames = servicesName
  12. 	}
  13. 	if servicesInfo, ok := &lt;-servicesInfoChan; ok {
  14. 		inputParameters.Services = servicesInfo
  15. 	}
  18. 	close(done)
  19. 	wg.Wait()
  21. }
  23. func TransformServiceNames(done &lt;-chan interface{}, servicesKey []ServiceKey, wg *sync.WaitGroup) &lt;-chan []ServiceKey {
  24. 	keysChan := make(chan []ServiceKey)
  25. 	go func() {
  26. 		defer wg.Done()
  27. 		transformedServicekeys := make([]ServiceKey, 0)
  28. 		for _, serviceKey := range servicesKey {
  29. 			a := strings.Split(serviceKey.Service, &quot;-&quot;)
  30. 			s := a[len(a)-1]
  31. 			transformedServicekeys = append(transformedServicekeys, ServiceKey{
  32. 				Service: s,
  33. 			})
  34. 		}
  35. 		for {
  36. 			select {
  37. 			case &lt;-done:
  38. 				return
  39. 			case keysChan &lt;- transformedServicekeys:
  40. 			}
  41. 		}
  42. 	}()
  43. 	return keysChan
  44. }
  46. func TransformServiceInfo(done &lt;-chan interface{}, servicesKey []ServiceInfo, wg *sync.WaitGroup) &lt;-chan []ServiceInfo {
  47. 	keysChan := make(chan []ServiceInfo)
  48. 	go func() {
  49. 		defer wg.Done()
  50. 		transformedServiceinfo := make([]ServiceInfo, 0)
  51. 		for _, serviceKey := range servicesKey {
  52. 			a := strings.Split(serviceKey.Service, &quot;-&quot;)
  53. 			s := a[len(a)-1]
  54. 			transformedServiceinfo = append(transformedServiceinfo, ServiceInfo{
  55. 				Service: s,
  56. 			})
  57. 		}
  58. 		for {
  59. 			select {
  60. 			case &lt;-done:
  61. 				return
  62. 			case keysChan &lt;- transformedServiceinfo:
  63. 			}
  64. 		}
  65. 	}()
  66. 	return keysChan
  67. }

huangapple
  • 本文由 发表于 2023年2月2日 17:01:37
  • 转载请务必保留本文链接：https://go.coder-hub.com/75320763.html
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