What are the best practices for golang functions?

Best practices for Go functions include: Function length should be less than 100 lines. The number of parameters should be kept to a minimum. Parameter types should be as specific as possible. The return value should be as specific as possible. Functions should handle errors gracefully. Functions should be unit tested.

#Best Practices for Go Functions

Function Length

Functions should be as short and concise as possible. Generally speaking, a function should not exceed 100 lines of code. If a function is too long, it will be difficult to understand and maintain.

Number of parameters

The number of parameters of a function should be as small as possible. Each additional parameter makes the function signature more complex and harder to remember how to call the function. If a function requires many parameters, consider splitting it into multiple smaller functions.

Parameter types

The parameter types of functions should be as specific as possible. This will help prevent errors and make the function easier to understand. For example, if a function requires a numeric parameter, you should specify the numeric type (such as int or float64) instead of using a generic type (such as interface{} ).

Return value

The function should return a specific value whenever possible. This will help avoid errors and make the function easier to understand. For example, if a function calculates the sum of two numbers, it should return an int value, not an interface{} value.

Error handling

Functions should always handle errors gracefully. This includes checking for errors and returning meaningful error messages. If the function cannot recover from the error, the panic function should be used to terminate the program.

Unit Testing

Functions should always be unit tested. This will help ensure the function works as expected and prevent errors. Functions can be easily tested using a unit testing framework such as the testing package.

Practical Case

The following are some examples of Go functions that follow best practices:

func Sum(a, b int) int {
    return a + b
}

func main() {
    result := Sum(1, 2)
    fmt.Println(result) // 输出: 3
}

In this example, the Sum function is short and concise, with only one parameters and returns a specific value. The function also uses unit tests to verify its behavior.

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