Linked Questions

I have one dictionary a = {1:11, 2:22} I want to check if key in b is present in a or not b = {3:33, 1:11} How can I do this in Go language? I have done it like this: a:= make(map[string][]string) ...

The following code yields true. So I'm wondering for map[string]string in Golang, is there a way to differentiate empty string and nothing? package main import "fmt" func main() { m := make(map[...

Suppose I have a map like: m := map[string]interface{}{} Now I get a string "a", I want to know if there's value in m["a"], how can I tell? As I can see now, m["a"] is never nil, so I can't compare ...

I have a interface and one method. type IAlertType interface { CreateAlertDetail(alertId uint, attributes map[string]string,id uint) IAlertType } And a map. var ProductAlertMap = map[string]...

And I can't seem to understand this kind of variable declaration: _, prs := m["example"] What exactly is "_," doing and why have they declared a variable like this instead of prs := m["example"] (I ...

We can easily do that with maps: item, ok := myMap["index"] But not with slices: item, ok := mySlice[3] // panic! Surprised this wasn't asked before. Maybe I'm on the wrong mental model with Go ...

The "Map types" section of the go language specification describes the interface and general usage of map types and the "Go maps in action" post on The Go Blog casually mentions ...

I want to create an array that contains unique strings. How can I do that? var paths = make([]string, 0) func main() { // Members are added dynamically paths = append(paths, "aaa") paths ...

I am searching for an efficient way to check if a value exists in Golang. The way I know is using a for loop/ range. Is there a better way to do the same? Any help would be appreciated :)

I need to check if the same key exists in two maps: if v1, ok1 := map1["aaa"]; ok1 { ... } if v2, ok2 := map2["aaa"]; ok2 { ... } Is it possible to join these two conditions into one? I managed to ...

In Go, let m is map object that map string to int, suppose "foo" is not a key of m, then the statement m["foo"] returns two value 0 and false which false implies "foo" is not a key of m. Could you ...

I have a map called nearby func Delete(w http.ResponseWriter, r *http.Request) { params := mux.Vars(r) delete(nearby, params["id"]) } I want to find out if the delete() call actually found a ...

Ok so according to this: How to check if a map contains a key in go? if val, ok := m["foo"]; ok { //do something here } that's fine, but how come we can't do this: val, ok := m["foo"] if val ==...

I have a map of slices that I need to remove duplicates from. I think I'm close to the solution but I'm missing something that I can't quite figure out. Expected output: map[key1:[1 2 3] key2:[1 2 3]]...

I am building a translation tool for my app. I have 2 different json files (en.json, fr.json), where my keys and values are. The en.json file is the referent file which means the keys present in ...

A Tour of Go explains how to test that a key is present in the map: m := make(map[string]int) m["Answer"] = 42 v, ok := m["Answer"] if ok { Do Something if set } if !ok { Do Something if not set } Is ...

We have a map[string]string, I assume that means the zero value of a string retrieved from the map is "" So doesn't that mean that this: var userId, ok = params["user_id"]; if !ok || userId == "" { ...