gconcat

A simple lib for concatenation, it accepts several types as a parameter and returns a string. A battery of tests was done, there are some complexities that we cannot escape to have the best computational cost

Example

Concatenating some basic types in Go

package main

import (
	g "github.com/jeffotoni/gconcat"
)

func main() {
	// accepting all types 
	str := g.Concat("/api/v1", "/", 39383838, "/", 129494, "/product/", 2012)
	println(str)

	// accepting only string
	str := g.ConcatStr("jeffotoni", "/", "2021", "/", "product")
	println(str)

	// accepting only string
	str := g.ConcatStrCopy("jeffotoni", "/", "2021", "/", "product")
	println(str)

	str := g.CopyStr("jeffotoni", "/", "2021", "/", "product")
	println(str)

	// accepting only string and int
	str := g.ConcatStrInt("jeffotoni", "/", 2021, "/", "product", "/", 1001)
	println(str)

	// accepting returns of params from functions
	str := g.ConcatFunc(foo())
	println(str)

	// combine types e functions returns
	str := g.Concat("jeffotoni",g.ConcatFunc(bar()),"/",2021)
	println(str)
}

Concatenating specific functions Go

package main

import (
	g "github.com/jeffotoni/gconcat"
)

func main() {
	// accepting all types 
	str := g.Concat("/api/v1", "/", 39383838, "/", 129494, "/product/", 2012)
	println(str)

	// accepting only string
	str = g.ConcatStr("jeffotoni", "/", "2021", "/", "product")
	println(str)

	// accepting only string
	str = g.ConcatString("jeffotoni", "/", "2021", "/", "product")
	println(str)

	// accepting only string and int
	str = g.ConcatStrInt("jeffotoni", "/", 2021, "/", "product", "/", 1001)
	println(str)

	// accepting only string and int
	str = g.ConcatStringInt("jeffotoni", "/", 2021, "/", "product", "/", 1001)
	println(str)

	// accepting only int
	str = g.ConcatSliceInt([]int{3,4,678,33,77},[]int{9,6,4,6,7})
	println(str)

	str = g.ConcatSliceFloat32([]float32{3.1,4.0,67.89,33.88,77.666})
	println(str)

	str = g.ConcatSliceBool([]bool{true, false, true})
	println(str)
}

Concatenating types using interfaces

package main

import (
	g "github.com/jeffotoni/gconcat"
)

func main() {
	var ii []interface{}
	ii = append(ii, "jeffotoni")
	ii = append(ii, " ")
	ii = append(ii, "joao")
	ii = append(ii, " ")
	ii = append(ii, 2021)

	var i interface{}
	i  = "jeffotoni"

	println(g.Concat(ii))
	println(g.Concat(i))
	println(g.Concat("jeffotoni", "&", "joao", " ", 20, "/08/"))
	println(g.Concat([]string{"2017", " ", "2018", " ", "2020"}))
	println(g.Concat([]int{12, 0, 11, 0, 10, 11, 12, 23, 3}))
	println(g.Concat(10,9,10,20,30,40,"x", "&", "."))
	println(g.Concat("R$ ",23456.33, " R$ ",123.33, " R$ ",19.11))
}

Concatenating Func in Go

package main

import (
	g "github.com/jeffotoni/gconcat"
	"fmt"
)

func main() {
	f1 := func(a float64) float64 {
		return 1 * 2.2
	}(float64(55.55))

	f2 := func(s string) string {
		return s + "2021"
	}(" hello ")

	f3 := func(a int) int {
		return a * 2
	}(3)

	f4 := func(a []int) (t []int) {
		for _, v := range a {
			t = append(t, v*2)
		}
		return
	}([]int{4, 5, 6, 7, 8})

	f5 := func(a []int) (t []float64) {
		for _, v := range a {
			t = append(t, float64(v)*1.2)
		}
		return
	}([]int{4.0, 5.0, 6.0, 7.0, 8.0})

	s1 := g.Concat([]bool{true, false, true})
	s := g.ConcatFunc(f1, f2, f3, f4, f5)
	fmt.Println(s + " " + s1)
}

Example on your project

package main

import (
	"log"
	"net/http"

	g "github.com/jeffotoni/gconcat"
)

const PORT = ":8282"

func main() {
	mux := http.NewServeMux()
	mux.HandleFunc("/ping",
		func(w http.ResponseWriter, r *http.Request) {
			str := g.Concat(
                            []int{1, 2, 3, 4, 5}, " ", 
                            []string{"Let's test our concat!!!"},
                    )
		w.Write([]byte(str))
		})
	    
	server := &http.Server{
		Addr:    PORT,
		Handler: mux,
	}
	println("Start Run: ", PORT)
	log.Fatal(server.ListenAndServe())
}

Some types allowed

• bool
• int
• int32
• int64
• interface
• string
• uint
• float32
• float64
• []int
• []int32
• []int64
• []interface
• []string
• []uint
• []float32
• []float64

Install Using go mod in your project

$ go mod init <your-dir>
$ go mod tidy
$ go run main.go

Another possibility would be

$ go get -u github.com/jeffotoni/gconcat

Test Benchmarking

$ go test -bench . -benchmem
goarch: amd64
pkg: github.com/jeffotoni/gconcat
cpu: Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz
BenchmarkConcatVector-12              	  444762	      2584 ns/op	    1400 B/op	      31 allocs/op
BenchmarkConcatFuncString-12          	10095128	       118.8 ns/op	      32 B/op	       2 allocs/op
BenchmarkConcatFuncInt-12             	10678944	       114.4 ns/op	      16 B/op	       2 allocs/op
BenchmarkConcatFuncStringVector-12    	 4447072	       269.2 ns/op	      84 B/op	       5 allocs/op
BenchmarkConcatFuncFuncAny-12         	 4006081	       304.6 ns/op	      87 B/op	       6 allocs/op
BenchmarkConcatStr-12                 	11044234	       109.1 ns/op	     416 B/op	       1 allocs/op
BenchmarkConcatStrInt-12              	 3676225	       326.4 ns/op	     952 B/op	       7 allocs/op
BenchmarkConcat-12                    	 3574280	       340.3 ns/op	     976 B/op	       8 allocs/op
BenchmarkConcatSliceIntString-12           	 5670842	       209.0 ns/op	     128 B/op	       6 allocs/op
BenchmarkLongJoin-12                  	10456964	       112.6 ns/op	     448 B/op	       1 allocs/op
BenchmarkLongSprintf-12               	 3954552	       300.3 ns/op	     480 B/op	       5 allocs/op
BenchmarkBuilder-12                   	 4020152	       264.7 ns/op	    2397 B/op	       0 allocs/op
BenchmarkMarshal-12                   	  351388	      3088 ns/op	     768 B/op	       1 allocs/op
PASS
ok  	github.com/jeffotoni/gconcat	17.928s

Creators

Jefferson Otoni, @jeffotoni, github.com/jeffotoni, linkedin.com/in/jeffotoni

João Vitor – @ancogamer, github.com/ancogamer, linkedin.com/in/joão-vitor-astori-saletti

Distributed under the MIT license. See LICENSE for more information.

Contributing

To contribuit is simples, just clone or fork the repository and send to us the pull request