Go and Error Handling

Posted by Bacancy Technology on February 15th, 2021

Go and Error Handling  

Go is built by Robert Griesemer, Rob Pike, and Ken Thompson, is a statically typed programming language with functions of safety, garbage collection, and CSP- style concurrency. Go language is trendy and mostly used by the developer. One of the most useful features used and loved by developers is handling errors while comparing with other programming languages that don’t have a catch/try methodology. Instead, it deals with error as the average return value.  

Go error handling has simple modules. By applying them with few logging rules, we can deal with unwanted errors and solve errors while developing the process. 

In this article, we will discuss some of the basic Go langs errors Handling. 

Blank Identifier 

Blank identifier 

Golang has a feature that defines an unused variable with a blank identifier. The new variable is expressed throughout the program. This variable is almost unreadable, but due to golang being an unconvinced and readable programming language, it doesn’t allow the developer to define unused variables. Then, it needs to face an error from the compiler. 

The blank identifier practice allocates error to blank identifier rather than proper handling, which is unsafe, so it means that need to decide explicitly to ignore vale that defined. 

result, _ := iterate(x,y)

if value > 0 {

  // ensure you check for errors before results.

}

Error Checking 

When you use multiple return values to handle errors, eventually you may end up with a deeply nested if-block which is one of the pain point of this error handling style.

func EatOrange() (*C, error) {

  var err error

  var a string

  a, err = GetA()

  if err == nil {

     var b string

     b, err = GetB(a)

     if err == nil {

        var c string

        c, err = GetC(b)

        if err == nil {

           return c, nil

        }

     }

  }

  return nil, err

}

The levels of nesting can go deeper than the example above. Composing a decision tree using the if-control-flow is pretty ugly IMO, yet it is undoubtedly easy to understand. Go lang error is a trade-off that you have to balance out while you’re crafting your code.

In Go error handling, we discuss the two primary error handling techniques which may help you to solve the Go error likewise other programming languages have to deal with error but go lang have many useful methods that find your query and resolve it as soon as possible so put your all quires in the dustbin and get comfortable dealing with Go error handling.