When and How Can Defer Statements Be Used in Go?

Go Idioms and Examples

As a language learner exploring Go, you may encounter unique constructs and idioms. Here's a list to enhance your understanding:

Defer Statements

The "defer" statement allows you to defer function execution until the surrounding function returns. It's convenient for cleanup tasks, locking/unlocking resources, or exception handling.

For example:

func doSomething() {
    funcToDefer()
}

func funcToDefer() {
    fmt.Println("Called after doSomething returns")
}

In this example, "funcToDefer" will be executed after "doSomething" completes.

Panic Handling with Defer

Defer is also used for panic recovery. You can defer a function to catch panics and perform cleanup actions:

defer func() {
    if r := recover(); r != nil {
        // Recover from panic and perform necessary actions
    }
}

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