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37 lines
856 B
Go
37 lines
856 B
Go
// defer_dbconn.go
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package main
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import "fmt"
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func main() {
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doDBOperations()
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}
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func connectToDB() {
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fmt.Println("ok, connected to db")
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}
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func disconnectFromDB() {
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fmt.Println("ok, disconnected from db")
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}
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func doDBOperations() {
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connectToDB()
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fmt.Println("Defering the database disconnect.")
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defer disconnectFromDB() //function called here with defer
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fmt.Println("Doing some DB operations ...")
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fmt.Println("Oops! some crash or network error ...")
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fmt.Println("Returning from function here!")
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return //terminate the program
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// deferred function executed here just before actually returning, even if there is a return or abnormal termination before
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}
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/* Output:
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ok, connected to db
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Defering the database disconnect.
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Doing some DB operations ...
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Oops! some crash or network error ...
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Returning from function here!
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ok, disconnected from db
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*/
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