How can I sort a Map[string]int by its values?

Question

Given this code block

map[string]int {"hello":10, "foo":20, "bar":20} 

I would like to print out

foo, 20 bar, 20 hello, 10 

In the order of highest to lowest

Answer 1

Found the answer on Golang-nuts by Andrew Gerrand

You can implement the sort interface by writing the len/less/swap functions

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] } 

For the original post, please find it here https://groups.google.com/forum/#!topic/golang-nuts/FT7cjmcL7gw