如何在golang中利用Select Channels Go并发式编程实现任务调度

package main

import (
    "fmt"
    "time"
)

type Task struct {
    ID       int
    Duration time.Duration
}

func worker(id int, tasks chan Task, results chan int) {
    for task := range tasks {
        fmt.Printf("Worker %d is processing Task %d
", id, task.ID)
        time.Sleep(task.Duration)
        results <- task.ID
    }
}

func scheduler(tasks []Task) {
    numWorkers := 3
    taskChan := make(chan Task)
    resultChan := make(chan int)

    for i := 0; i < numWorkers; i++ {
        go worker(i, taskChan, resultChan)
    }

    // 将任务发送到任务通道
    for _, task := range tasks {
        taskChan <- task
    }
    close(taskChan)

    // 监听结果通道，输出执行结果
    for i := 0; i < len(tasks); i++ {
        result := <-resultChan
        fmt.Printf("Task %d is completed
", result)
    }
}

func main() {
    tasks := []Task{
        {ID: 1, Duration: 1 * time.Second},
        {ID: 2, Duration: 2 * time.Second},
        {ID: 3, Duration: 3 * time.Second},
        {ID: 4, Duration: 4 * time.Second},
    }
    scheduler(tasks)
}