Error-Handling Scheme with Closures
Explore how to simplify error handling in Go by combining closures with defer, panic, and recover mechanisms. Understand when and how to apply this pattern to functions with uniform signatures, allowing centralized error recovery and cleaner code.
We'll cover the following...
We'll cover the following...
Whenever a function returns, we should test whether it results in an error: this can lead to repetitive and tedious code. Combining the defer/panic/recover mechanisms with closures can result in a far more elegant scheme that we will now discuss. However, it is only applicable when all functions have the same signature, which is rather restrictive. A good example of its use is in web applications, where all handler functions are of the following type:
func handler1(w http.ResponseWriter, r *http.Request) { ... }
Suppose all functions have the ...