thoughts on code examples [err]

was looking throuh some of the code files and i noticed you use

```go
if err != nil {
log.Fatalln(err)
}
```

in most samples, my thought on this is why not add modules? or a function in another module file to handel errors where the function looks similar to this

```go
func CheckErr(err error, format string) {
if err != nil {
if format == "log" {log.fatalln(err)}
}
}

```

and just advance the code from there, idk if thats just a me thing but i feel like it would be great to do in a sense of code optimization