Type Assertion

Introduction

In the previous lesson, we covered type conversions. Now, we will move on to discuss how, if you have a value that you want to convert to another or a specific type (in case of interface{}), you can use type assertion. A type assertion takes a value and tries to create another version in the specified explicit type.

Examples

In the example below, the timeMap function takes a value and if it can be asserted as a map of interfaces{} keyed by strings, then it injects a new entry called “updated_at” with the current time value.