func (s defaultStringSlice) get(i int) string {
	if len(s) > i {
		return s[i]
	}
	return ""
}
get function returns "", if the slice does not have the specified index.
package main
import (
	"errors"
	"fmt"
	"reflect"
	"regexp"
	"strconv"
	"strings"
	"unicode"
)
type defaultNumSlice []int
func (n defaultNumSlice) get(i int) int {
	if len(n) > i {
		return n[i]
	}
	return 0
}
type defaultStringSlice []string