如果我不需要错误处理，如何将多值返回函数的结果用作Golang中另一个函数的参数？ [重复]

Question

This question already has an answer here:

• Multiple values in single-value context 5 answers

The following is what I want to achieve

fmt.Println(string(ioutil.ReadAll(res.Body)))

But this throws the following error.

multiple-value ioutil.ReadAll() in single-value context

I know that ioutil.ReadAll() returns the bytes and the error. But I don't want to write an extra line as follows

bytes, _ := ioutil.ReadAll(resp.Body)

Is it possible to just pass the result of ioutil.ReadAll() to fmt.Println() if don't care abut error handling in Go?

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Answer 1

If you want it only once, it makes little sense in my opinion. However if this is a common situation and you feel that it improves code readability a lot, try something like:

// perhaps, there's a better name for this
func resultToString(b []byte, _ error) string { 
    return string(b)
}

// and later:
fmt.Println(resultToString(ioutil.ReadAll(res.Body)))

Unfortunately, that's a string-specific function, so for any other type you'll need to duplicate it.