What is the complicated writing method in golang?

Golang is a strongly typed language that has attracted more and more attention in recent years. Golang's own garbage collection mechanism and language-level support for concurrent programming make Golang more suitable than C/C and Java for building high-concurrency and high-reliability distributed systems. However, Golang also has some syntax and concepts that can be confusing to beginners, such as complex writing.

In Golang, complex writing methods usually involve the following two aspects:

1. Intricate code structure

Golang is mandatory during language design Format the code, which makes the code structure very clear. However, when the code complexity increases, in order to implement certain functions, programmers may nest many layers of structures within the code, such as if statements, for loops, etc., making the code structure intricate:

func someFunc(someArg []string) {
    for i, arg := range someArg {
        if arg == "update" {
            someOtherFunc(arg)
        } else {
            someOtherFunc2(i)
        }
    }
}

func someOtherFunc(arg string) {
    if arg != "update" {
        return
    }
    // do something
}

func someOtherFunc2(i int) {
    if i%2 == 0 {
        // do something
    } else {
        // do something else
    }
}

In this example, we can see that the someFunc function has a for loop and two if statements nested in it, while the someOtherFunc and someOtherFunc2 functions have conditional branches. . When the code size expands to thousands of lines, the code structure becomes very complex.

2. Cumbersome function calls

In Golang, functions are considered first-class citizens. This means that the function itself can also be used as a parameter or return value of other functions. This feature makes Golang very convenient when implementing certain high-order functions. However, the calling method inside the function may also become cumbersome:

func someFunc() {
    someMap := make(map[string][]int)
    data := []string{"a", "b", "c", "d", "e"}
    for i, d := range data {
        someMap[d] = []int{i, i * 2, i * 3}
    }
    result := make(map[int]map[string][]int)
    for k, v := range someMap {
        for i, num := range v {
            if _, ok := result[num]; !ok {
                result[num] = make(map[string][]int)
            }
            result[num][k] = []int{i, i * 2, i * 3}
        }
    }
    // do something with result
}

In this example, we can see that someFunc has multiple nested for loops in the function, and the if statement passes Map stores data in key-value pairs. When the code involves multiple complex structures, the function calling process can become very cumbersome.

Summary

Complex writing is a feature of Golang, which allows programmers to flexibly use various grammatical features in the code to implement functions. However, when the code becomes complex, programmers should also consider how to optimize the code structure and use appropriate design patterns and algorithms to improve the maintainability and readability of the code.

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