Learn Data Structures and Algorithms with Golang

The defer and panic statements

The defer statement defers the execution of the function until the surrounding function returns. The panic function stops the current flow and control. Deferred functions are executed normally after the panic call. In the following code example, the defer call gets executed even when the panic call is invoked:

    defer database.Close()    return customer}// GetCustomers method returns Customer Arrayfunc GetCustomers() []Customer {    var database *sql.DB    database = GetConnection()    var error error    var rows *sql.Rows    rows, error = database.Query("SELECT * FROM Customer ORDER BY Customerid DESC")    if error != nil {       panic(error.Error())    }   var customer Customer    customer = Customer{}    var customers []Customer