Tips for leveraging concurrent programming using Golang functions

Use Golang to implement concurrent programming: Create goroutine: Use the go keyword to create a lightweight thread goroutine. Using channels: Channels are data structures for communication between goroutines that can send and receive values. Practical case: Parallel computing: Create a goroutine array to calculate the sum of numbers in parallel, significantly improving computing performance.

Using Golang functions to implement concurrent programming

In Golang, concurrency is achieved through goroutines and channels. Goroutines are lightweight threads, and channels are a mechanism for communication between goroutines.

Create goroutine

Use the go keyword to create a goroutine. This will create a new goroutine and execute the function at the same time.

func main() {
    // 创建一个打印"Hello, world!"的goroutine
    go fmt.Println("Hello, world!")
}

Channel

Channel is a data structure used for communication between goroutines. It can send and receive values.

// 创建一个发送字符串到通道的goroutine
func send(ch chan string) {
    ch <- "Hello, channel!"
}

// 创建一个接收通道中字符串的goroutine
func receive(ch chan string) {
    fmt.Println(<-ch)
}

Practical Case: Parallel Computing

We use concurrency to calculate the sum of a set of numbers in parallel. We create an array of goroutines, and each goroutine is responsible for calculating the sum of a part of the array.

func main() {
    // 创建要计算和的数组
    nums := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

    // 创建goroutine通道
    var ch = make(chan int)

    // 创建goroutine数组，每个goroutine负责计算数组一部分的和
    for i := 0; i < len(nums); i++ {
        go func(i int) {
            sum := 0
            for j := i; j < len(nums); j++ {
                sum += nums[j]
            }
            ch <- sum
        }(i)
    }

    // 从goroutine接收结果并求和
    totalSum := 0
    for i := 0; i < len(nums); i++ {
        totalSum += <-ch
    }

    fmt.Println("Total sum:", totalSum)
}

By using concurrency, we can significantly improve the performance of computing sums.

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