All Questions
1,358
questions
1
vote
1
answer
63
views
How do you flatten a slice of arrays without extra allocation?
In Go, if I have a slice of arrays of a given type, how can I convert that to just a slice of that same type?
Specifically, is it possible to do this without allocating memory for a new backing array? ...
- 852
-2
votes
1
answer
51
views
How do I append to slice in struct of multidimensional in Go? [duplicate]
New to Go...
I have the following:
type class struct{
Name string
Age int
Address string
Phone. int
}
SchoolClassList := [12][4]class{}
NewStudent := class{}
To start, I initialize ...
- 1
1
vote
1
answer
48
views
Go ozzo validation. check if a stuct field is in a slice
I have a struct like:
type Foo string
type Mystruct struct {
currentFoo Foo
foos []Foo
}
I want to validate that currentFoo is in foos. I am doing
func (s MyStruct) ValidateInput() error {
...
- 2,287
1
vote
1
answer
73
views
Go how to only marshal a slice if its not nil. Json showing null for for nil slice
I have a struct in Golang which a slice of my alias type:
type Foo struct {
NextSet []House `json:"next_set"`
}
I want to marshal this into a json. When I do not initialise ...
- 2,287
-3
votes
1
answer
58
views
does append empty slice to another slice can process allocation in golang?
i have a small question about 'append' function in golang:
I have a slice1 and a function which calls in for loop and returns some slice2 which can be empty as well. So the question is how golang will ...
0
votes
2
answers
59
views
Different Behaviors in Go Race Condition Scenarios
I'm trying to understand why two similar pieces of code behave differently. Both snippets create a large number of goroutines that try to append to the same slice concurrently, which I understand is a ...
- 1,457
2
votes
1
answer
116
views
Why doesn't a byte slice satisfy a generic type constraint of an any slice?
I have the following code with two generic functions. They both do the simple operation of appending a slice to itself and returning the result. However, invoking the simpler and more straightforward ...
- 259
-4
votes
1
answer
84
views
Taking a slice pointer and returning pointers to that slice's elements
Im currently learning GO and i decided to redo a character ranker i made in python a year ago as an exercise. The program takes user input and makes a slice of structs with them (the struct consists ...
- 3
1
vote
1
answer
55
views
Updating slice after passing to function in Go
I want to use defer in Go while also updating the list I am passing in the function itself.
package main
import (
"fmt"
"time"
)
func record(start time.Time, l []int) {
...
- 99
1
vote
1
answer
208
views
A compilation error while using builtin func "max" with Go 1.22.1 : "invalid operation: invalid use of ... with built-in max"
I want to use max to get the maximum in slice, and I looked at the function declaration for max:
func max[T cmp.Ordered](x T, y ...T) T
But even though it was the same as my "myMax" ...
- 31
1
vote
2
answers
69
views
how to add all thing in slice to an only one string
hello every body i was coding about create a map and on that map we have 2 thing name of book and number of book and i stuck in one thing if name of book is look like this "Harry Potter" ...
- 69
1
vote
1
answer
119
views
multidimensional slice access performance in golang
I am working on a little and simple game-of-life in Golang and stumbled on a performance problem during slice access.
This is the primary data structure for the game:
type Neighbor struct {
X, Y ...
- 119
0
votes
1
answer
102
views
GoLang - looping through array of structs - can I map?
I'm new to GoLang, coming from Node. A little late to the (definitely not functional) game and need some help understanding approaches, and perhaps just understanding...
I want to omit an item from a ...
- 656
-1
votes
1
answer
85
views
Dereferencing pointers in a slice does not seem to yield the initial value that the pointer was created from [duplicate]
I need to make a slice of pointers for a Go project I'm working on, that references the items in a slice. The expected behavior would be that I could modify one of the dereferenced items in the slice ...
- 44
-3
votes
2
answers
341
views
How to remove duplicate elements from a slice of slices in golang
i have a function which returns a slice of slices.
[[-1 -1 2] [-1 0 1] [-1 0 1]]
Trying one way of map method wont work because slice cannot be a key. How do i remove the duplicate elements here.
- 419