Golang snippets

multierror.go

import (
	"fmt"
	"strings"
)

// MultiError holds multiple errors
type MultiError []error

// Error implements the error interface. The returned string is not memoized, so calling
// this method ranges over the error slice and allocates a new string
func (me MultiError) Error() string {
	nErrs := len(me)
	errStrs := make([]string, nErrs)
	for i := range me {
		errStrs[i] = me[i].Error()
	}
	return fmt.Sprintf("%d error(s): '%s'", nErrs, strings.Join(errStrs, "', '"))
}

// Append appends a new error onto the backing slice
func (me *MultiError) Append(err ...error) {
	*me = append(*me, err...)
}