func (r *RSS) Swap(i, j int) {
	r.Feeds[j], r.Feeds[i] = r.Feeds[i], r.Feeds[j]
}
Swap swaps feed[i] and feed[j]
package cgi
import (
	"io"
	"regexp"
	"sort"
	"strings"
	"time"
)
type Item struct {
	Title       string
	Link        string
	Description string
	Creator     string
	Date        int64
	content     string
	Content     string
	Subject     []string
}
type RSS struct {
	Encode      string
	Lang        string
	Title       string
	Link        string
	Description string
	Feeds       []*Item
	parent      string
	URI         string
	XSL         string
}