Can I create an associative array of different objects in Go?

Question

I want to set an instance of a some type as an element in an associative array. What type should I use?

var objects //???

//The constructor will return instance of the IndexController type
objects["IndexController"] = index.Constructor()

fmt.Println(objects)

I will be thankful!

alecbz · Accepted Answer · 2014-04-19 18:21:51Z

2

Go maps are generally homogenous (each value is of the same type). If you want a different type per index, you can make an array of some interface that all of the objects in the array support. If you don't need the objects to support any methods at all, you can use the empty interface interface{}.

objects := make(map[string]interface{})
objects["IndexController"] = somethingThatReturnsAnIndexController()

answered Apr 19, 2014 at 18:21

alecbz

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2 Comments

siritinga Over a year ago

Just a comment: Go is strongly typed, so even if you can use interface{}, you will need to specify the type when you want to actually use it.

dethtron5000 Over a year ago

@siritinga or do a type switch

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