给定此代码块
map[string]int {"hello":10, "foo":20, "bar":20}
我想打印出来
foo, 20 bar, 20 hello, 10
从高到低的顺序
谢谢!
在Andrew Gerrand的Golang-nuts上找到了答案
您可以通过编写len / less / swap函数来实现sort接口
func rankByWordCount(wordFrequencies map[string]int) PairList{ pl := make(PairList, len(wordFrequencies)) i := 0 for k, v := range wordFrequencies { pl[i] = Pair{k, v} i++ } sort.Sort(sort.Reverse(pl)) return pl } type Pair struct { Key string Value int } type PairList []Pair func (p PairList) Len() int { return len(p) } func (p PairList) Less(i, j int) bool { return p[i].Value < p[j].Value } func (p PairList) Swap(i, j int){ p[i], p[j] = p[j], p[i] }
对于原始帖子,请在这里https://groups.google.com/forum/#!topic/golang- nuts/FT7cjmcL7gw找到