Golang create a slice of maps

dictionary go hashmap slice key-value
scott picture scott · Feb 12, 2016 · Viewed 14.7k times · Source

I was trying to create a slice of maps the following way.

keyvalue := make(map[string]interface{})
keyvalueslice := make([]keyvalue, 1, 1)

I was trying to create it just like the way string slice is created, however I am getting an error saying keyvalue is not a type. I am creating this slice to append data to keyvalueslice variable later.

Can someone explain what is wrong?

Answer

wlredeye picture wlredeye · Feb 12, 2016

keyvalue is a variable not a type, you can't create a slice of variables. If you want to define custom type you can do this like

type keyvalue map[string]interface{}

then you can create a slice of keyvalues:

keyvalueslice := make([]keyvalue, 1, 1)

Example on playground

Or you can do this without defining custom type:

keyvalueslice := make([]map[string]interface{}, 1, 1)

Related questions

How to check if a map contains a key in Go?

I know I can iterate over a map m by, for k, v := range m { ... } and look for a key but is there a more efficient way of testing a key's existence in a map? I couldn't find the answer …

Read More
Iterating over all the keys of a map

Is there a way to get a list of all the keys in a Go language map? The number of elements is given by len(), but if I have a map like: m := map[string]string{ "key1":"val1", "key2":"val2" }; …

Read More
Nested maps in Golang

func main() { var data = map[string]string{} data["a"] = "x" data["b"] = "x" data["c"] = "x" fmt.Println(data) } It runs. func main() { var data = map[string][]string{} data["a"] = append(data["a"], "x") data["b"] = append(data["b"], "x") …

Read More