How to print struct variables in console?

To print the name of the fields in a struct:

fmt.Printf("%+v\n", yourProject)

From the fmt package:

when printing structs, the plus flag (%+v) adds field names

That supposes you have an instance of Project (in ‘yourProject‘)

The article JSON and Go will give more details on how to retrieve the values from a JSON struct.

This Go by example page provides another technique:

type Response2 struct {
  Page   int      `json:"page"`
  Fruits []string `json:"fruits"`
}

res2D := &Response2{
    Page:   1,
    Fruits: []string{"apple", "peach", "pear"}}
res2B, _ := json.Marshal(res2D)
fmt.Println(string(res2B))

That would print:

{"page":1,"fruits":["apple","peach","pear"]}

If you don’t have any instance, then you need to use reflection to display the name of the field of a given struct, as in this example.

type T struct {
    A int
    B string
}

t := T{23, "skidoo"}
s := reflect.ValueOf(&t).Elem()
typeOfT := s.Type()

for i := 0; i < s.NumField(); i++ {
    f := s.Field(i)
    fmt.Printf("%d: %s %s = %v\n", i,
        typeOfT.Field(i).Name, f.Type(), f.Interface())
}

Related Posts:

  1. C-like structures in Python
  2. C-like structures in Python
  3. typedef struct vs struct definitions [duplicate]
  4. Why should we typedef a struct so often in C?
  5. Why should we typedef a struct so often in C?
  6. typedef struct vs struct definitions [duplicate]
  7. When should you use a class vs a struct in C++?
  8. dereferencing pointer to incomplete type
  9. Struct Constructor in C++?
  10. C++ struct constructor
  11. “error: assignment to expression with array type error” when I assign a struct field (C)
  12. How do you make an array of structs in C?
  13. Error: “Cannot modify the return value” c#
  14. Map like structure in C: use int and struct to determine a value
  15. Vector of structs initialization
  16. Difference between a Structure and a Union
  17. MINGW64 “make build” error: “bash: make: command not found”
  18. error: expected primary-expression before ‘)’ token (C)
  19. Extracting substrings in Go
  20. Golang package is not in GOROOT (/usr/local/go/src/packageName)
  21. What’s the difference between struct and class in .NET?
  22. How to load modules from gitlab subgroup?
  23. How to initialize a struct in accordance with C programming language standards
  24. What are the differences between struct and class in C++?
  25. Incompatible implicit declaration of built-in function ‘malloc’
  26. How to import local packages in go?
  27. How to import local packages without gopath
  28. What is the cause of flexible array member not at end of struct error?
  29. size of struct in C
  30. Warning: assignment from incompatible pointer type
  31. How to properly malloc for array of struct in C
  32. How to check if a file exists in Go?
  33. C++ Expression must have pointer-to-object type
  34. Why am I getting this error: “data definition has no type or storage class”?
  35. Difference between ‘struct’ and ‘typedef struct’ in C++?
  36. How to set GOPRIVATE environment variable
  37. Is there a queue implementation?
  38. error: expected unqualified-id before ‘.’ token //(struct)
  39. Function for C++ struct
  40. Scanning Multiple inputs from one line using scanf
  41. What does “request for member ‘*******’ in something not a structure or union” mean?
  42. What does “request for member ‘*******’ in something not a structure or union” mean?
  43. Structs in Javascript
  44. Initializing array of structures
  45. How to return a struct from a function in C++?
  46. Contains method for a slice
  47. Import cycle not allowed
  48. How to delete an element from a Slice in Golang
  49. Structure padding and packing
  50. too many initializers for ‘int [0]’ c++
  51. C Unknown type name ‘my_structure’
  52. “warning: useless storage class specifier in empty declaration” in struct
  53. typedef struct pointer definition
  54. Go build: “Cannot find package” (even though GOPATH is set)
  55. strconv.Atoi() throwing error when given a string
  56. Struct inheritance in C++
  57. Why and when to use static structures in C programming?
  58. error: struct has no member named X
  59. Constructor for structs in C
  60. Is there a foreach loop in Go?
  61. How to uninstall Go?
  62. Struct with template variables in C++
  63. GO language: fatal error: all goroutines are asleep – deadlock
  64. Error: Conversion to non-scalar type requested
  65. What is a rune?

Leave a Comment