How Can I Assign and Call Functions as Values in a Go Map?

Assigning Functions to Keys in a Go Map

In Go, you can define custom functions and assign them as values to keys in a map. This allows for dynamic execution of functions based on a given key.

To achieve this, you can create a map of type map[string]func(...) where the key is a string and the value is a function. However, the provided code attempts to use a syntax that is not supported in Go.

To fix this, use the following code:

func a(param string) {
    fmt.Println("Function a called with param:", param)
}

func main() {
    m := map[string]func(string) {
        "a_func": a,
    }

    for key, value := range m {
        if key == "a_func" {
            value("test")
        }
    }
}

In this example:

• The map[string]func(string) declares a map with string keys and functions that take a single string argument.
• The m variable initializes a map with a key "a_func" and a value that is a reference to the a function.
• The range loop iterates over the map, calling the function associated with the "a_func" key and passing "test" as an argument.

Note that the interface{} type in the provided code example is not necessary and can be simplified to func(...).

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