GoLang: Working with map in Anynomous structs

huangapple
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英文:

GoLang: Working with map in Anynomous structs

问题

我正在尝试理解如何在匿名结构体中使用映射。

我的代码如下：

  1. places := struct {
  2. 	  Country map[string][]string
  3. 	}{
  4. 	  make(map[string][]string)["india"] :=  []string{"Chennai", "Hyderabad", "Kolkata"}
  5. 	}

我尝试使用new()进行初始化，但没有成功。

在匿名结构体中使用映射是可能的吗？

谢谢。

英文:

I am trying to understand how to use maps in anonymous structs.

My code is as below

  1. places := struct {
  2. 	  Country map[string][]string
  3. 	}{
  4. 	  make(map[string][]string)["india"] :=  []string{"Chennai", "Hyderabad", "Kolkata" }
  5. 	}

I tried with new()with initialization with no success.

is it possible to use maps inside anonymous structs ?

Thank you.

答案1

得分: 2

这应该可以工作：https://goplay.space/#gfSDLS79AHB

  1. package main
  3. import (
  4.     "fmt"
  5. )
  7. func main() {
  9.     places := struct {
  10.         Country map[string][]string
  11.     }{
  12.         Country: map[string][]string{"india": {"Chennai", "Hyderabad", "Kolkata"}},
  13.     }
  15.     fmt.Println("places =", places)
  16. }
英文:

This should work: https://goplay.space/#gfSDLS79AHB

  1. package main
  3. import (
  4.     "fmt"
  5. )
  7. func main() {
  9.     places := struct {
  10.         Country map[string][]string
  11.     }{
  12.         Country: map[string][]string{"india": {"Chennai", "Hyderabad", "Kolkata"}},
  13.     }
  15.     fmt.Println("places =", places)
  16. }

答案2

得分: 2

使用复合字面量：

  1. places := struct {
  2.     Country map[string][]string
  3. }{
  4.     Country: map[string][]string{"india": {"Chennai", "Hyderabad", "Kolkata"}},
  5. }

或者，如果你想使用make，你可以使用多个语句：

  1. places := struct {
  2.     Country map[string][]string
  3. }{
  4.     Country: make(map[string][]string),
  5. }
  6. places.Country["india"] = []string{"Chennai", "Hyderabad", "Kolkata"}
  8. // 或者
  10. places := struct { Country map[string][]string }
  11. places.Country = make(map[string][]string)
  12. places.Country["india"] = []string{"Chennai", "Hyderabad", "Kolkata"}
英文:

Use a composite literal:

  1. places := struct {
  2.     Country map[string][]string
  3. }{
  4.     Country: map[string][]string{"india": {"Chennai", "Hyderabad", "Kolkata"}},
  5. }

Or, if you want to use make, you can do so with multiple statements:

  1. places := struct {
  2.     Country map[string][]string
  3. }{
  4.     Country: make(map[string][]string),
  5. }
  6. places.Country["india"] = []string{"Chennai", "Hyderabad", "Kolkata"}
  8. // or
  10. places := struct { Country map[string][]string }
  11. places.Country = make(map[string][]string)
  12. places.Country["india"] = []string{"Chennai", "Hyderabad", "Kolkata"}

huangapple
  • 本文由 发表于 2022年3月25日 14:16:26
  • 转载请务必保留本文链接：https://go.coder-hub.com/71612868.html
  • go
  • maps
  • struct
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