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package orderedmap_test
import (
"encoding/json"
"fmt"
"github.com/wk8/go-ordered-map/v2"
)
func Example() {
om := orderedmap.New[string, string](3)
om.Set("foo", "bar")
om.Set("bar", "baz")
om.Set("coucou", "toi")
fmt.Println("## Get operations: ##")
fmt.Println(om.Get("foo"))
fmt.Println(om.Get("i dont exist"))
fmt.Println(om.Value("coucou"))
fmt.Println("## Iterating over pairs from oldest to newest: ##")
for pair := om.Oldest(); pair != nil; pair = pair.Next() {
fmt.Printf("%s => %s\n", pair.Key, pair.Value)
}
fmt.Println("## Iterating over the 2 newest pairs: ##")
i := 0
for pair := om.Newest(); pair != nil; pair = pair.Prev() {
fmt.Printf("%s => %s\n", pair.Key, pair.Value)
i++
if i >= 2 {
break
}
}
fmt.Println("## JSON serialization: ##")
data, err := json.Marshal(om)
if err != nil {
panic(err)
}
fmt.Println(string(data))
fmt.Println("## JSON deserialization: ##")
om2 := orderedmap.New[string, string]()
if err := json.Unmarshal(data, &om2); err != nil {
panic(err)
}
fmt.Println(om2.Oldest().Key)
// Output:
// ## Get operations: ##
// bar true
// false
// toi
// ## Iterating over pairs from oldest to newest: ##
// foo => bar
// bar => baz
// coucou => toi
// ## Iterating over the 2 newest pairs: ##
// coucou => toi
// bar => baz
// ## JSON serialization: ##
// {"foo":"bar","bar":"baz","coucou":"toi"}
// ## JSON deserialization: ##
// foo
}
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