What is the future trend of function return values ​​in Golang?

In Go, the multiple return value feature allows functions to return multiple values, thereby enhancing flexibility. By naming return values, developers can improve the readability and maintainability of their code.

The future trend of Go function return values

In Go, functions can return any type of data, including other functions, Structures and slices. Traditionally, however, Go functions only return a value. As the language evolved, multiple return value features were introduced, providing developers with more flexibility.

Multiple return values

Multiple return values ​​allow a function to return multiple values. This can be achieved by declaring multiple return value types directly in the function signature:

func AddAndSubtract(a, b int) (int, int) {
    return a + b, a - b
}

This function returns two integer values, representing the result of addition and the result of subtraction.

Named return values

For functions with multiple return values, named return values ​​can be used to improve the readability and maintainability of the code. This can be achieved by using a syntax of the form name=type in the function signature:

func CalculateStatistics(data []float64) (
    average float64,
    max float64,
    min float64,
) {}

Practical example

The following is the use of multiple return values Practical examples of and named return values:

import (
    "fmt"
)

func main() {
    // 使用多返回值
    sum, difference := AddAndSubtract(10, 5)
    fmt.Println("Sum:", sum, "Difference:", difference)

    // 使用命名返回值
    avg, max, min := CalculateStatistics([]float64{10.5, 12.3, 8.9})
    fmt.Println("Average:", avg, "Max:", max, "Min:", min)
}

Conclusion

Multiple return values ​​and named return values ​​provide Go developers with more flexibility to write More readable and maintainable code. As Go evolves, we expect these features to become more common and more widely adopted.

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