101 questions
1
vote
0
answers
32
views
compare and copy one instance of the same go struct to another updated instance
I have a nested go struct, and i have two instances of it. The original and the new one. I need a way to compare these two instances and copy all the fields (if they are filled and skip the empty one'...
0
votes
1
answer
104
views
Determining the type of an interface {} value returned from a function in Golang
I have a function that returns a value from an enum. The enum definition is as follows:
type DataType int64
const (
INT DataType = iota
FLOAT
STRING
BOOL
CHAR
VOID
ERROR
...
- 77
0
votes
1
answer
40
views
How create type using reflect having pointer receivers
I've two Task struct, namely ShellTask and CmdTask. Created a TaskExecutor Interface and implemented the methods both in ShellTask and CmdTask Pointer receiver. And creating the Task Executor ...
- 10.1k
2
votes
1
answer
640
views
Render table in html template where table-data are keys and values of some json data in Golang
In backend I send http request to some third party site and retrieve some json data in response. Keys in the json response are not always same, but I have some idea of what they might be. For example:
...
- 51
-2
votes
1
answer
126
views
Declare type dynamically in GoLang [duplicate]
I have a field struct type:
{
Name: "fieldA",
Type: "string",
}
and an array of this filed type:
[{
Name: "fieldA"
Type: "string"
},
{
Name: "filedB",...
- 427
2
votes
0
answers
159
views
How to create a new instance of a struct that is read from file
I know this may seem like bad design (and I wish I didn't need to do this), but I need to read a struct that is generated automatically at run time and create a new instance of it.
The struct that I ...
- 306
0
votes
0
answers
332
views
golang. reflect makefunc: how to decorate the origin func?
I'm making a tools that decorte my origin function to test my program. It can inject some specific method to oringin function. Now I'm using reflect to do that:
I will define a Handle function to ...
- 111
1
vote
0
answers
56
views
How to flatten a dynamic value in Go?
I am trying to flatten a dynamic value in Go into a slice of key value pairs. So I define a struct as :
type KeyValuePair struct {
key string
value interface{}
}
For simple values like x = 10, ...
- 3,709
1
vote
1
answer
2k
views
Can I optimize this Go reflect function so it isn't as slow?
I am working on a project where I need to build out the partial updates for all of the methods that will be supported. Each partial update will require a different struct, with different fields and ...
- 158
0
votes
1
answer
170
views
Is there a way to set a pointer struct field to a pointer pointing to the Zero value of that pointer type using reflect?
That was a mouthful of a title, let me explain more. Assuming I have a struct of all pointers (don't know of what type)
type A struct {
S *string
I *int
}
I want to write a function that takes a ...
- 683
-1
votes
1
answer
162
views
How can I reach struct member in interface type
I have to keep multi type struct in slice and seed them. I took with variadic parameter of interface type and foreach them. If I call the method of interface it works, but when I trying to reach to ...
- 341
1
vote
0
answers
35
views
How to get a single struct with a struct array in reflect
type Foo struct {
Bar interface{}
Nothing string
}
type A struct {
...
}
type B struct {
...
}
var car Foo
In the program, car.Bar maybe []A or []B.
I don't know what is real 'Foo' ...
- 11
1
vote
1
answer
1k
views
Get pointers to all fields of a struct dynamically using reflection
I'm trying to build a simple orm layer for golang.
Which would take a struct and generate the cols [] which can then be passed to sql function
rows.Scan(cols...) which takes pointers of fields in the ...
- 165
2
votes
1
answer
597
views
go reflect: how to dynamically create a pointer to a pointer to ...?
I would like to create a reflect.Value that represents a multiple-level nested pointer to a final value. The nesting level is not known at compile time. How can I create pointers to pointers using ...
- 2,761
0
votes
2
answers
1k
views
Append to golang slice passed as empty interface
How to append to empty interface (that has been verified to be a *[]struct)?
func main() {
var mySlice []myStruct // myStruct can be any struct (dynamic)
decode(&mySlice, "...")
}
...
- 737