Ordered Map in Golang

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Tips & Traps¶

There are 2 implementations of ordered map in Golang orderedmap and go-ordered-map . orderedmap is more popular (based on GitHub statistics) and thus is preferred.

import "github.com/elliotchance/orderedmap/v2"

error executing "/usr/local/go/bin/go build -buildmode=plugin" in directory "/home/dclong/go/src/gomacro.imports/gomacro_pid_7244/import_1": exit status 2

var m OrderedMap[string, any]

repl.go:1:17: expected ';', found '['

m := orderedmap.NewOrderedMap[string, any]()
m

repl.go:1:37: expected ']', found ','

	m.Set("foo", "bar")
	m.Set("qux", 1.23)
	m.Set("123", true)

	m.Delete("qux")

m := orderedmap.NewOrderedMap[string, any]()

	m.Set("foo", "bar")
	m.Set("qux", 1.23)
	m.Set("123", true)

	m.Delete("qux")

References¶

🟢 encoding/json/v2: support preservation of object key ordering encoding/json: no way to preserve the order of map keys