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57 lines
921 B
Markdown
57 lines
921 B
Markdown
---
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date: 2020-09-09
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id: 5114b51a-da22-4c9c-a12c-c416aeb984b6
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title: Golang Errors
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---
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# Basics
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Go supports Errors
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``` go
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import (
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"errors"
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"fmt"
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)
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func ThrowError(throwError bool) error {
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if throwError {
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return errors.New("This is an error")
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}
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fmt.Println("No error was thrown!")
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return nil
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}
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func main() {
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ThrowError(true)
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ThrowError(false)
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}
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```
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# Wrappers
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It appears to be good practice to make errors a `const`. This example
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uses the Error [interface](20200831171822-interfaces):
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``` go
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const (
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ErrNotFound = DictionaryErr("could not find the word you were looking for")
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ErrWordExists = DictionaryErr("cannot add word because it already exists")
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)
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type DictionaryErr string
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func (e DictionaryErr) Error() string {
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return string(e)
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}
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```
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# Handy Links
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- Constant errors[^1]
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# Footnotes
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[^1]: <https://dave.cheney.net/2016/04/07/constant-errors>
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