fix: adjust to some linter findings

Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>

context/readerioeither/http/builder/builder_test.go

@@ -32,12 +32,12 @@ import (
 func TestBuilderWithQuery(t *testing.T) {
 	// add some query
 	withLimit := R.WithQueryArg("limit")("10")
-	withUrl := R.WithUrl("http://www.example.org?a=b")
+	withURL := R.WithUrl("http://www.example.org?a=b")
 
 	b := F.Pipe2(
 		R.Default,
 		withLimit,
-		withUrl,
+		withURL,
 	)
 
 	req := F.Pipe3(

context/readerioeither/http/request_test.go

@@ -31,7 +31,7 @@ import (
 )
 
 type PostItem struct {
-	UserId uint   `json:"userId"`
+	UserID uint   `json:"userId"`
 	Id     uint   `json:"id"`
 	Title  string `json:"title"`
 	Body   string `json:"body"`

http/builder/builder.go

@@ -76,7 +76,7 @@ var (
 	noBody     = O.None[E.Either[error, []byte]]()
 	noQueryArg = O.None[string]()
 
-	parseUrl   = E.Eitherize1(url.Parse)
+	parseURL   = E.Eitherize1(url.Parse)
 	parseQuery = E.Eitherize1(url.ParseQuery)
 
 	// WithQuery creates a [Endomorphism] for a complete set of query parameters
@@ -153,7 +153,7 @@ func (builder *Builder) GetTargetUrl() E.Either[error, string] {
 	return F.Pipe3(
 		builder,
 		Url.Get,
-		parseUrl,
+		parseURL,
 		E.Chain(F.Flow4(
 			T.Replicate2[*url.URL],
 			T.Map2(

internal/foldable/types.go

@@ -0,0 +1,26 @@
+// Copyright (c) 2024 IBM Corp.
+// All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package foldable
+
+import (
+	M "github.com/IBM/fp-go/monoid"
+)
+
+type Foldable[A, B, HKTA any] interface {
+	Reduce(func(B, A) B, B) func(HKTA) B
+	ReduceRight(func(B, A) B, B) func(HKTA) B
+	FoldMap(m M.Monoid[B]) func(func(A) B) func(HKTA) B
+}

internal/fromeither/types.go

@@ -0,0 +1,24 @@
+// Copyright (c) 2024 IBM Corp.
+// All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package fromeither
+
+import (
+	ET "github.com/IBM/fp-go/either"
+)
+
+type FromEither[E, A, HKTA any] interface {
+	FromEither(ET.Either[E, A]) HKTA
+}

internal/fromio/types.go

@@ -0,0 +1,20 @@
+// Copyright (c) 2024 IBM Corp.
+// All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package fromio
+
+type FromIO[A, GA ~func() A, HKTA any] interface {
+	FromIO(GA) HKTA
+}

ioeither/http/builder/builder_test.go

@@ -31,12 +31,12 @@ import (
 func TestBuilderWithQuery(t *testing.T) {
 	// add some query
 	withLimit := R.WithQueryArg("limit")("10")
-	withUrl := R.WithUrl("http://www.example.org?a=b")
+	withURL := R.WithUrl("http://www.example.org?a=b")
 
 	b := F.Pipe2(
 		R.Default,
 		withLimit,
-		withUrl,
+		withURL,
 	)
 
 	req := F.Pipe3(

ioeither/http/retry_test.go

@@ -40,7 +40,7 @@ var testLogPolicy = R.CapDelay(
 )
 
 type PostItem struct {
-	UserId uint   `json:"userId"`
+	UserID uint   `json:"userId"`
 	Id     uint   `json:"id"`
 	Title  string `json:"title"`
 	Body   string `json:"body"`

iterator/stateless/iterator_test.go

@@ -67,8 +67,8 @@ func isPrimeNumber(num int) bool {
 	if num <= 2 {
 		return true
 	}
-	sq_root := int(math.Sqrt(float64(num)))
-	for i := 2; i <= sq_root; i++ {
+	sqRoot := int(math.Sqrt(float64(num)))
+	for i := 2; i <= sqRoot; i++ {
 		if num%i == 0 {
 			return false
 		}

samples/http/http_test.go

@@ -33,8 +33,8 @@ import (
 )
 
 type PostItem struct {
-	UserId uint   `json:"userId"`
-	Id     uint   `json:"id"`
+	UserID uint   `json:"userId"`
+	ID     uint   `json:"id"`
 	Title  string `json:"title"`
 	Body   string `json:"body"`
 }
@@ -43,7 +43,7 @@ type CatFact struct {
 	Fact string `json:"fact"`
 }
 
-func idxToUrl(idx int) string {
+func idxToURL(idx int) string {
 	return fmt.Sprintf("https://jsonplaceholder.typicode.com/posts/%d", idx+1)
 }
 
@@ -59,7 +59,7 @@ func TestMultipleHttpRequests(t *testing.T) {
 	count := 10
 
 	data := F.Pipe3(
-		A.MakeBy(count, idxToUrl),
+		A.MakeBy(count, idxToURL),
 		R.TraverseArray(F.Flow3(
 			H.MakeGetRequest,
 			readSinglePost,
@@ -74,7 +74,7 @@ func TestMultipleHttpRequests(t *testing.T) {
 	assert.Equal(t, E.Of[error](count), result())
 }
 
-func heterogeneousHttpRequests() R.ReaderIOEither[T.Tuple2[PostItem, CatFact]] {
+func heterogeneousHTTPRequests() R.ReaderIOEither[T.Tuple2[PostItem, CatFact]] {
 	// prepare the http client
 	client := H.MakeClient(HTTP.DefaultClient)
 	// readSinglePost sends a GET request and parses the response as [PostItem]
@@ -97,7 +97,7 @@ func heterogeneousHttpRequests() R.ReaderIOEither[T.Tuple2[PostItem, CatFact]] {
 // TestHeterogeneousHttpRequests shows how to execute multiple HTTP requests in parallel when
 // the response structure of these requests is different. We use [R.TraverseTuple2] to account for the different types
 func TestHeterogeneousHttpRequests(t *testing.T) {
-	data := heterogeneousHttpRequests()
+	data := heterogeneousHTTPRequests()
 
 	result := data(context.Background())
 
@@ -108,6 +108,6 @@ func TestHeterogeneousHttpRequests(t *testing.T) {
 // the response structure of these requests is different. We use [R.TraverseTuple2] to account for the different types
 func BenchmarkHeterogeneousHttpRequests(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		heterogeneousHttpRequests()(context.Background())()
+		heterogeneousHTTPRequests()(context.Background())()
 	}
 }

samples/mostly-adequate/chapter06_exampleapplication_test.go

@@ -67,26 +67,26 @@ func Example_application() {
 		S.Format[string](fmt.Sprintf("https://%s%s%%s", host, path)),
 	)
 	// flick returns jsonP, we extract the JSON body, this is handled by jquery in the original code
-	sanitizeJsonP := Replace(regexp.MustCompile(`(?s)^\s*\((.*)\)\s*$`))("$1")
+	sanitizeJSONP := Replace(regexp.MustCompile(`(?s)^\s*\((.*)\)\s*$`))("$1")
 	// parse jsonP
-	parseJsonP := F.Flow3(
-		sanitizeJsonP,
+	parseJSONP := F.Flow3(
+		sanitizeJSONP,
 		S.ToBytes,
 		J.Unmarshal[FlickrFeed],
 	)
 	// markup
 	img := S.Format[string]("<img src='%s'/>")
 	// lenses
-	mediaUrl := F.Flow2(
+	mediaURL := F.Flow2(
 		FlickrItem.getMedia,
 		FlickrMedia.getLink,
 	)
-	mediaUrls := F.Flow2(
+	mediaURLs := F.Flow2(
 		FlickrFeed.getItems,
-		A.Map(mediaUrl),
+		A.Map(mediaURL),
 	)
 	images := F.Flow2(
-		mediaUrls,
+		mediaURLs,
 		A.Map(img),
 	)
 
@@ -97,7 +97,7 @@ func Example_application() {
 		url,
 		H.MakeGetRequest,
 		H.ReadText(client),
-		R.ChainEitherK(parseJsonP),
+		R.ChainEitherK(parseJSONP),
 		R.Map(images),
 	)
 

samples/mostly-adequate/chapter10_applicativefunctor_test.go

@@ -32,7 +32,7 @@ import (
 
 type (
 	PostItem struct {
-		UserId uint   `json:"userId"`
+		UserID uint   `json:"userId"`
 		Id     uint   `json:"id"`
 		Title  string `json:"title"`
 		Body   string `json:"body"`
@@ -77,15 +77,15 @@ func (player Player) getName() string {
 	return player.Name
 }
 
-func (player Player) getId() int {
+func (player Player) getID() int {
 	return player.Id
 }
 
 func (item PostItem) getTitle() string {
 	return item.Title
 }
 
-func idxToUrl(idx int) string {
+func idxToURL(idx int) string {
 	return fmt.Sprintf("https://jsonplaceholder.typicode.com/posts/%d", idx+1)
 }
 
@@ -101,7 +101,7 @@ func Example_renderPage() {
 
 	// get returns the title of the nth item from the REST service
 	get := F.Flow4(
-		idxToUrl,
+		idxToURL,
 		H.MakeGetRequest,
 		H.ReadJson[PostItem](client),
 		R.Map(PostItem.getTitle),

samples/mostly-adequate/chapter11_transformagain_test.go

@@ -26,7 +26,7 @@ import (
 	S "github.com/IBM/fp-go/string"
 )
 
-func findUserById(id int) IOE.IOEither[error, Chapter08User] {
+func findUserByID(id int) IOE.IOEither[error, Chapter08User] {
 	switch id {
 	case 1:
 		return IOE.Of[error](albert08)
@@ -52,15 +52,15 @@ func Example_solution11A() {
 }
 
 func Example_solution11B() {
-	findByNameId := F.Flow2(
-		findUserById,
+	findByNameID := F.Flow2(
+		findUserByID,
 		IOE.Map[error](Chapter08User.getName),
 	)
 
-	fmt.Println(findByNameId(1)())
-	fmt.Println(findByNameId(2)())
-	fmt.Println(findByNameId(3)())
-	fmt.Println(findByNameId(4)())
+	fmt.Println(findByNameID(1)())
+	fmt.Println(findByNameID(2)())
+	fmt.Println(findByNameID(3)())
+	fmt.Println(findByNameID(4)())
 
 	// Output:
 	// Right[<nil>, string](Albert)

samples/mostly-adequate/chapter12_traversing_test.go

@@ -42,7 +42,7 @@ var (
 	}
 
 	// validate :: Player -> Either error Player
-	validatePlayer = E.FromPredicate(P.ContraMap(Player.getName)(S.IsNonEmpty), F.Flow2(Player.getId, errors.OnSome[int]("player %d must have a name")))
+	validatePlayer = E.FromPredicate(P.ContraMap(Player.getName)(S.IsNonEmpty), F.Flow2(Player.getID, errors.OnSome[int]("player %d must have a name")))
 
 	// readfile :: String -> String -> Task Error String
 	readfile = F.Curry2(func(encoding, file string) IOE.IOEither[error, string] {

samples/presentation/benchmarks/http_test.go

@@ -31,7 +31,7 @@ import (
 )
 
 type PostItem struct {
-	UserId uint   `json:"userId"`
+	UserID uint   `json:"userId"`
 	Id     uint   `json:"id"`
 	Title  string `json:"title"`
 	Body   string `json:"body"`
@@ -41,7 +41,7 @@ type CatFact struct {
 	Fact string `json:"fact"`
 }
 
-func heterogeneousHttpRequests(count int) R.ReaderIOEither[[]T.Tuple2[PostItem, CatFact]] {
+func heterogeneousHTTPRequests(count int) R.ReaderIOEither[[]T.Tuple2[PostItem, CatFact]] {
 	// prepare the http client
 	client := H.MakeClient(HTTP.DefaultClient)
 	// readSinglePost sends a GET request and parses the response as [PostItem]
@@ -64,7 +64,7 @@ func heterogeneousHttpRequests(count int) R.ReaderIOEither[[]T.Tuple2[PostItem,
 	)
 }
 
-func heterogeneousHttpRequestsIdiomatic(count int) ([]T.Tuple2[PostItem, CatFact], error) {
+func heterogeneousHTTPRequestsIdiomatic(count int) ([]T.Tuple2[PostItem, CatFact], error) {
 	// prepare the http client
 	var result []T.Tuple2[PostItem, CatFact]
 
@@ -109,13 +109,13 @@ func BenchmarkHeterogeneousHttpRequests(b *testing.B) {
 
 	b.Run("functional", func(b *testing.B) {
 		for n := 0; n < b.N; n++ {
-			benchResults = heterogeneousHttpRequests(count)(context.Background())()
+			benchResults = heterogeneousHTTPRequests(count)(context.Background())()
 		}
 	})
 
 	b.Run("idiomatic", func(b *testing.B) {
 		for n := 0; n < b.N; n++ {
-			benchResults, _ = heterogeneousHttpRequestsIdiomatic(count)
+			benchResults, _ = heterogeneousHTTPRequestsIdiomatic(count)
 		}
 	})