Create a map of string to List

Question

I\'d like to create a map of string to container/list.List instances. Is this the correct way to go about it?

package main

import (
    \"fmt\"         


        

Answer 1

there's nothing technically incorrect about what you've written, but you should define your own type around map[string]*list.List to avoid some pitfalls, like trying to call the .Front() method on a nil pointer. Or make it a map[string]list.List to avoid that situation. A list.List is just a pair of pointers and a length value; using a list.List pointer in your map just adds the extra case of a nil pointer on top of the case of an empty list. In either situation, you should define a new struct for this use case.

I would be inclined to write it like this: http://play.golang.org/p/yCTYdGVa5G