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Maps in Go

The Valley of Code

Your Web Development Manual

A map is a very useful data type in Go.

In other language it’s also called dictionary or hash map or associative array.

Here’s how you create a map:

agesMap := make(map[string]int)

You don’t need to set how many items the map will hold.

You can add a new item to the map in this way:

agesMap["flavio"] = 39

You can also initialize the map with values directly using this syntax:

agesMap := map[string]int{"flavio": 39}

You can get the value associated with a key using:

age := agesMap["flavio"]

You can delete an item from the map using the delete() function in this way:

delete(agesMap, "flavio")
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