Can You Dynamically Iterate through Packages in Go?

How Dynamically Iterating through Packages Isn't Possible in Go

In a recent Go programming inquiry, a user expressed a desire to dynamically traverse a package and its methods. While Python allows for such functionality, Go does not offer this capability.

This design decision stems from Go's compilation process, which includes only those functions and variables explicitly referenced in the code. Therefore, iterating over the complete set of symbols within a package is not feasible, as some may be absent from the final executable.

Alternative Approach: Array of Custom Types

Although direct package iteration is not available in Go, an alternative approach involves creating an array containing instances of the desired types. This array can then be iterated to access relevant methods.

For instance, in the provided calculation example, a custom array could be constructed:

var methods = [...]Calc{
    &calculator.Add{},
    &calculator.Sub{},
    &calculator.Mul{},
    &calculator.Div{},
}

Subsequently, the methods can be iterated over:

for _, method := range methods {
    method.First(x)
    method.Second(x)
}

This method eliminates the need for repetitive object assignments and provides a more concise and maintainable solution.

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