关于算法:1418菜谱

func displayTable(orders [][]string) (ret [][]string) {    tb := make([]map[string]int, 501)    title := []string{}    foodMap := map[string]bool{}    for _, v := range orders {        tbNum, _ := strconv.Atoi(v[1])        food := v[2]        if tb[tbNum] == nil {            tb[tbNum] = map[string]int{}        }        if !foodMap[food] {            title = append(title, food)            foodMap[food] = true        }        tb[tbNum][food]++    }    sort.Strings(title)    title = append([]string{"Table"}, title...)    ret = append(ret, title)    for tbNum := 1; tbNum < 501; tbNum++ {        if tb[tbNum] == nil {            continue        }        row := []string{strconv.Itoa(tbNum)}        for i := 1; i < len(title); i++ {            if x, ok := tb[tbNum][title[i]]; ok {                row = append(row, strconv.Itoa(x))                continue            }            row = append(row, "0")        }        ret = append(ret, row)    }        return ret}