How to Convert `interface{}` to String in Go?

How to Convert an Interface{} to a String in Go

When working with Go, you may encounter a scenario where you need to concatenate values from a map to form a string. If the map values are of type interface{}, attempts to concatenate them directly will result in a type mismatch error.

To resolve this issue, you need to convert the values to strings using type assertion:

Option 1: Using Type Assertion

In the provided code example, the map keys are strings, while the values are of type interface{}. To convert them to strings, use the following syntax:

host := arguments["<host>"].(string) + ":" + arguments["<port>"].(string)

Option 2: Using Docopt's Conversion Methods

If you're using the Docopt library for command-line argument parsing, you can use its conversion methods to simplify the process:

host, err := arguments.String("<host>")
port, err := arguments.String("<port>")
host_port := host + ":" + port

These methods will handle the type conversions for you, ensuring that the values are converted to strings before concatenation. By following these approaches, you can effectively convert interface{} values to strings and work with them seamlessly in Go.

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