package badtudexo

import (
	st "saggytrousers"
	"errors"
)

// Take two sheets, and concatenate them. 
// Note: this done wrong at the moment, it should take [][]string not []string.
func Concat(fst, snd []string) []string {
	return append(append([]string{}, fst...), snd...)
} 

func ConcatCheckHeaders(fst, snd, fsthd, sndhd []string) ([]string, error) {
	if !st.SliceEq(fsthd, sndhd) {
		return []string{}, errors.New("Header mismatch")
	}

	return Concat(fst, snd), nil
}