Golang匿名函数与闭包实战详解

<code>func() {
    fmt.Println("Hello from anonymous function")
}()
</code>

<code>greet := func(name string) {
    fmt.Printf("Hello, %s!\n", name)
}
greet("Alice") // 输出: Hello, Alice!
</code>

<code>numbers := []int{1, 2, 3, 4}
each := func(arr []int, fn func(int)) {
    for _, v := range arr {
        fn(v)
    }
}
each(numbers, func(n int) {
    fmt.Println(n * n)
})
</code>

<code>newCounter := func() func() int {
    count := 0
    return func() int {
        count++
        return count
    }
}
counter := newCounter()
fmt.Println(counter()) // 1
fmt.Println(counter()) // 2
</code>

<code>for i := 0; i </code>

<code>for i := 0; i </code>

<code>logger := func(prefix string) func(string) {
    return func(msg string) {
        fmt.Printf("[%s] %s\n", prefix, msg)
    }
}
infoLog := logger("INFO")
errorLog := logger("ERROR")
infoLog("User logged in")   // [INFO] User logged in
errorLog("File not found")  // [ERROR] File not found
</code>