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Article Series

This article series discuss more than 18 different programming languages. Please read overview before you read any of the details.

Playing with Records Related Articles.

Where to Discuss?

Local Group

Preface

Goal: Alternative query using Koazee, go-linq or go-funk.


6: Using Third Party Module

There is however other way to make our life simpler.

I won’t give much talk, just the code should be enough.

Reference

I don’t which one is the best. All works for me.

The choice is your.

Koazee

package main

import (
	"fmt"
	"example.com/mysongs"
	"github.com/wesovilabs/koazee"
)

var tags = []string{
	"rock", "jazz", "rock", "pop", "pop"}

func main() {
    var stream = koazee.StreamOf(mysongs.GetSongs())

	stream = stream.Map(
		func(song mysongs.Song) []string {
			return song.Tags
		}).Filter(
		func(tags []string) bool {
			return tags != nil
		}).Do()

	var flatten = stream.Reduce(
		func(acc, tags []string) []string {
			return append(acc, tags...)
		})

	stream = koazee.StreamOf(flatten.Val()).
		RemoveDuplicates()

	fmt.Printf("stream : %v\n", stream.Out().Val())
}

With the result similar as below slices.

$ go run 14-koazee.go
stream : [60s jazz rock 70s pop]

Go: Third Party Query with Koazee

Go Linq

package main

import "fmt"
import . "example.com/mysongs"
import . "github.com/ahmetb/go-linq/v3"

func main() {
	var tags  []string

	From(GetSongs()).
	WhereT(func(song Song) bool {
		return song.Tags != nil
	}).SelectT(func(song Song) []string {
		return song.Tags
	}).SelectMany(func(tag interface{}) Query {
		return From(tag)
	}).Distinct().ToSlice(&tags)

	fmt.Println(tags)
}

With the result similar as below slices.

$ go run 15-linq.go
[60s jazz rock 70s pop]

Go: Third Party Query with go-linq

Go Funk

package main

import "fmt"
import "example.com/mysongs"
import "github.com/thoas/go-funk"

func main() {
	var tags []string

	tags = funk.
	Chain(mysongs.GetSongs()).
	Filter(func(song mysongs.Song) bool {
		return song.Tags != nil
	}).Map(func(song mysongs.Song) []string {
		return song.Tags
	}).FlattenDeep().
	Uniq().
	Value().([]string)

	fmt.Println(tags)
}

With the result similar as below slices.

 >}}
$ go run 16-funk.go
[60s jazz rock 70s pop]

Go: Third Party Query with go-funk

I think that is all.


What is Next 🤔?

Consider continue reading [ Rust - Playing with Records - Part One ].