How does goroutine transfer data in golang function?

There are three ways to use goroutine to transmit data in Go functions: pass data through pipes, create unbuffered channels, and let Goroutine send and receive data through pipes. Pass data through the channel parameter and use the channel as a parameter of the function to allow the function to access the pipe. Pass data through the interface, use different types with the same methods, and let the Goroutine interact with the data through the interface.

Use goroutine in Go function to transfer data

Goroutine is a lightweight concurrent function in Go that allows you to transmit data without blocking the main thread. Perform tasks. Passing data between functions is a common scenario for using goroutines.

Passing data through pipes

Pipes are unbuffered channels used for communication between Goroutines. Here is an example of how to pass data through a pipe:

package main

import (
    "fmt"
    "time"
)

func main() {
    // 创建一个管道
    channel := make(chan int)

    // 创建一个 Goroutine 来发送数据
    go func() {
        time.Sleep(1 * time.Second)
        channel <- 42 // 将 42 发送到管道
    }()

    // 从管道中接收数据
    data := <-channel
    fmt.Println("Received:", data)
}

Passing data through the channel parameter

You can pass a channel as a parameter to a function, allowing the function to access the pipe:

package main

import (
    "fmt"
    "time"
)

func sendData(channel chan int) {
    time.Sleep(1 * time.Second)
    channel <- 42 // 将 42 发送到管道
}

func main() {
    // 创建一个管道
    channel := make(chan int)

    // 创建一个 Goroutine 来发送数据
    go sendData(channel)

    // 从管道中接收数据
    data := <-channel
    fmt.Println("Received:", data)
}

Channel is useful when you need to send or receive data from multiple Goroutines.

Passing data through interfaces

Interfaces allow you to use different types with the same methods. Here is an example of how to pass data through an interface:

package main

import (
    "fmt"
    "time"
)

type Data interface {
    getData() int
}

type dataImpl struct {
    data int
}

func (d *dataImpl) getData() int {
    return d.data
}

func main() {
    // 创建一个实现了 Data 接口的结构
    data := &dataImpl{42}

    // 创建一个 Goroutine 来处理数据
    go func() {
        time.Sleep(1 * time.Second)
        fmt.Println("Data:", data.getData()) // 调用接口方法
    }()
}

Passing data through an interface makes your code more flexible and extensible.

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