create a map with a key of type slice in go

In Go, a map is a collection of key-value pairs. Each key in a map must be unique and can be of any comparable type. However, a slice is not a comparable type and cannot be used as a key by itself. To use a slice as a key in a Go map, we need to create a custom type that can be used as a key.

Here's an example of how to create a map with a key of type slice in Go:

main.go
package main

import "fmt"

type sliceKey struct {
    slice []int
}

func main() {
    m := make(map[sliceKey]string)

    // create a slice to use as a key
    key := sliceKey{slice: []int{1, 2, 3}}

    // add a value to the map using the key
    m[key] = "value"

    // retrieve the value using the key
    value := m[key]

    fmt.Println(value) // output: value
}
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In the above code, we define a custom type sliceKey that contains a slice of integers. We then use this type as the key in our map. To add a value to the map, we create a sliceKey instance and use it as the key. To retrieve the value, we use the same sliceKey instance as the key.

By using a custom type as the key, we can use slices, arrays, or any other complex data structure as the key in a Go map.