Linter Cleanup (#276)

* linter cleanup * fix default case
2025-10-30 23:37:40 +02:00 · 2019-03-29 17:48:51 +03:00
parent 752ee02cd1
commit de703513e4
41 changed files with 408 additions and 147 deletions
--- a/cli/browser/browser.go
+++ b/cli/browser/browser.go
@@ -40,12 +40,16 @@ func (b *Browser) DebuggingPort() int {
 func (b *Browser) Close() error {
 	var err error

-	if runtime.GOOS != "windows" {
+	if runtime.GOOS != goosWindows {
 		err = b.cmd.Process.Signal(os.Interrupt)
 	} else {
 		err = b.cmd.Process.Kill()
 	}

+	if err != nil {
+		return err
+	}
+
 	_, err = b.cmd.Process.Wait()

 	if err != nil {
--- a/cli/browser/flags.go
+++ b/cli/browser/flags.go
@@ -2,9 +2,10 @@ package browser

 import (
 	"fmt"
-	"github.com/pkg/errors"
 	"sort"
 	"strings"
+
+	"github.com/pkg/errors"
 )

 type Flags map[string]interface{}
@@ -61,8 +62,6 @@ func (flags Flags) Has(arg string) bool {
 }

 func (flags Flags) List() []string {
-	var list []string
-
 	orderedFlags := make([]string, 0, 10)

 	for arg := range flags {
@@ -71,7 +70,9 @@ func (flags Flags) List() []string {

 	sort.Strings(orderedFlags)

-	for _, arg := range orderedFlags {
+	list := make([]string, len(orderedFlags))
+
+	for i, arg := range orderedFlags {
 		val, err := flags.Get(arg)

 		if err != nil {
@@ -87,7 +88,7 @@ func (flags Flags) List() []string {
 			arg = fmt.Sprintf("--%s", arg)
 		}

-		list = append(list, arg)
+		list[i] = arg
 	}

 	return list
--- a/cli/browser/helpers.go
+++ b/cli/browser/helpers.go
@@ -9,7 +9,7 @@ import (
 func resolveExecutablePath() (path string) {

 	switch runtime.GOOS {
-	case "darwin":
+	case goosDarwin:
 		for _, c := range []string{
 			"/Applications/Google Chrome Canary.app",
 			"/Applications/Google Chrome.app",
@@ -22,7 +22,7 @@ func resolveExecutablePath() (path string) {
 			}
 		}

-	case "linux":
+	case goosLinux:
 		for _, c := range []string{
 			"headless_shell",
 			"chromium",
@@ -35,7 +35,7 @@ func resolveExecutablePath() (path string) {
 			}
 		}

-	case "windows":
+	case goosWindows:
 	}

 	return
--- a/cli/browser/launcher.go
+++ b/cli/browser/launcher.go
@@ -41,7 +41,7 @@ func Launch(setters ...Option) (*Browser, error) {
 		flags.SetN("mute-audio")
 	}

-	if runtime.GOOS == "windows" {
+	if runtime.GOOS == goosWindows {
 		flags.SetN("disable-gpu")
 	}

--- a/cli/browser/options.go
+++ b/cli/browser/options.go
@@ -18,6 +18,12 @@ type (
 	}
 )

+const (
+	goosWindows = "windows"
+	goosLinux   = "linux"
+	goosDarwin  = "darwin"
+)
+
 func WithoutDefaultArgs() Option {
 	return func(opts *Options) {
 		opts.ignoreDefaultArgs = true
--- a/cli/repl.go
+++ b/cli/repl.go
@@ -3,11 +3,12 @@ package cli
 import (
 	"context"
 	"fmt"
-	"github.com/MontFerret/ferret/pkg/parser/fql"
 	"os"
 	"os/signal"
 	"strings"

+	"github.com/MontFerret/ferret/pkg/parser/fql"
+
 	"github.com/MontFerret/ferret/pkg/compiler"
 	"github.com/MontFerret/ferret/pkg/runtime"
 	"github.com/MontFerret/ferret/pkg/runtime/logging"
@@ -74,7 +75,7 @@ func Repl(version string, opts Options) {

 		line = strings.TrimSpace(line)

-		if len(line) == 0 {
+		if line == "" {
 			continue
 		}

--- a/go.mod
+++ b/go.mod
@@ -3,25 +3,74 @@ module github.com/MontFerret/ferret
 go 1.12

 require (
+	github.com/OpenPeeDeeP/depguard v0.0.0-20181229194401-1f388ab2d810 // indirect
 	github.com/PuerkitoBio/goquery v1.5.0
+	github.com/StackExchange/wmi v0.0.0-20181212234831-e0a55b97c705 // indirect
 	github.com/antlr/antlr4 v0.0.0-20190325153624-837aa60e2c47
 	github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e
+	github.com/coreos/etcd v3.3.12+incompatible // indirect
 	github.com/corpix/uarand v0.0.0
 	github.com/derekparker/trie v0.0.0-20190322172448-1ce4922c7ad9
+	github.com/fatih/color v1.7.0 // indirect
+	github.com/go-critic/go-critic v0.3.4 // indirect
+	github.com/go-ole/go-ole v1.2.4 // indirect
+	github.com/go-toolsmith/astcast v1.0.0 // indirect
+	github.com/go-toolsmith/astcopy v1.0.0 // indirect
+	github.com/go-toolsmith/astfmt v1.0.0 // indirect
+	github.com/go-toolsmith/astp v1.0.0 // indirect
+	github.com/go-toolsmith/pkgload v1.0.0 // indirect
+	github.com/go-toolsmith/typep v1.0.0 // indirect
 	github.com/gofrs/uuid v3.2.0+incompatible
+	github.com/gogo/protobuf v1.2.1 // indirect
+	github.com/golang/mock v1.2.0 // indirect
+	github.com/golang/protobuf v1.3.1 // indirect
+	github.com/golangci/errcheck v0.0.0-20181223084120-ef45e06d44b6 // indirect
+	github.com/golangci/go-tools v0.0.0-20190124090046-35a9f45a5db0 // indirect
+	github.com/golangci/gocyclo v0.0.0-20180528144436-0a533e8fa43d // indirect
+	github.com/golangci/gofmt v0.0.0-20181222123516-0b8337e80d98 // indirect
+	github.com/golangci/golangci-lint v1.15.0 // indirect
+	github.com/golangci/gosec v0.0.0-20180901114220-8afd9cbb6cfb // indirect
+	github.com/golangci/lint-1 v0.0.0-20181222135242-d2cdd8c08219 // indirect
+	github.com/golangci/revgrep v0.0.0-20180812185044-276a5c0a1039 // indirect
+	github.com/gopherjs/gopherjs v0.0.0-20190328170749-bb2674552d8f // indirect
 	github.com/gorilla/css v1.0.0
 	github.com/gorilla/websocket v1.4.0 // indirect
+	github.com/kisielk/errcheck v1.2.0 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
+	github.com/kr/pty v1.1.4 // indirect
 	github.com/labstack/echo v3.3.10+incompatible
 	github.com/labstack/gommon v0.2.8 // indirect
 	github.com/mafredri/cdp v0.22.0
 	github.com/mattn/go-colorable v0.1.1 // indirect
 	github.com/mattn/go-isatty v0.0.7 // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/mozilla/tls-observatory v0.0.0-20190313211306-43961c0c7a1f // indirect
 	github.com/natefinch/lumberjack v2.0.0+incompatible
+	github.com/nbutton23/zxcvbn-go v0.0.0-20180912185939-ae427f1e4c1d // indirect
+	github.com/onsi/ginkgo v1.8.0 // indirect
+	github.com/onsi/gomega v1.5.0 // indirect
 	github.com/pkg/errors v0.8.1
+	github.com/rogpeppe/go-internal v1.2.2 // indirect
 	github.com/rs/zerolog v1.13.0
+	github.com/ryanuber/go-glob v1.0.0 // indirect
 	github.com/sethgrid/pester v0.0.0-20190127155807-68a33a018ad0
+	github.com/shirou/gopsutil v2.18.12+incompatible // indirect
+	github.com/shurcooL/go v0.0.0-20190121191506-3fef8c783dec // indirect
+	github.com/sirupsen/logrus v1.4.0 // indirect
+	github.com/smartystreets/assertions v0.0.0-20190215210624-980c5ac6f3ac // indirect
 	github.com/smartystreets/goconvey v0.0.0-20190306220146-200a235640ff
+	github.com/spf13/afero v1.2.2 // indirect
+	github.com/spf13/cobra v0.0.3 // indirect
+	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/spf13/viper v1.3.2 // indirect
+	github.com/stretchr/testify v1.3.0 // indirect
+	github.com/ugorji/go/codec v0.0.0-20190320090025-2dc34c0b8780 // indirect
 	github.com/valyala/fasttemplate v1.0.1 // indirect
-	golang.org/x/net v0.0.0-20190327091125-710a502c58a2
+	golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c // indirect
+	golang.org/x/net v0.0.0-20190328230028-74de082e2cca
 	golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6
+	golang.org/x/sys v0.0.0-20190322080309-f49334f85ddc // indirect
+	golang.org/x/tools v0.0.0-20190328211700-ab21143f2384 // indirect
+	mvdan.cc/unparam v0.0.0-20190310220240-1b9ccfa71afe // indirect
+	sourcegraph.com/sqs/pbtypes v1.0.0 // indirect
 )
--- a/go.sum
+++ b/go.sum
@@ -1,59 +1,252 @@
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/OpenPeeDeeP/depguard v0.0.0-20180806142446-a69c782687b2/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o=
+github.com/OpenPeeDeeP/depguard v0.0.0-20181229194401-1f388ab2d810/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o=
 github.com/PuerkitoBio/goquery v1.5.0 h1:uGvmFXOA73IKluu/F84Xd1tt/z07GYm8X49XKHP7EJk=
 github.com/PuerkitoBio/goquery v1.5.0/go.mod h1:qD2PgZ9lccMbQlc7eEOjaeRlFQON7xY8kdmcsrnKqMg=
+github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
+github.com/StackExchange/wmi v0.0.0-20181212234831-e0a55b97c705/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
 github.com/andybalholm/cascadia v1.0.0 h1:hOCXnnZ5A+3eVDX8pvgl4kofXv2ELss0bKcqRySc45o=
 github.com/andybalholm/cascadia v1.0.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
 github.com/antlr/antlr4 v0.0.0-20190325153624-837aa60e2c47 h1:Lp5nUoQzppfVmfZadpzAytNyb5IMtxyOJLzoQS5dExg=
 github.com/antlr/antlr4 v0.0.0-20190325153624-837aa60e2c47/go.mod h1:T7PbCXFs94rrTttyxjbyT5+/1V8T2TYDejxUfHJjw1Y=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e h1:fY5BOSpyZCqRo5OhCuC+XN+r/bBCmeuuJtjz+bCNIf8=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/etcd v3.3.12+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
+github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/corpix/uarand v0.0.0 h1:mNbzro1GwUcZ1hmO2rWXytkR3JBxNxxctzjyuhO+Aig=
 github.com/corpix/uarand v0.0.0/go.mod h1:JSm890tOkDN+M1jqN8pUGDKnzJrsVbJwSMHBY4zwz7M=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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 github.com/derekparker/trie v0.0.0-20190322172448-1ce4922c7ad9 h1:aSaTVlEXc2QKl4fzXU1tMYCjlrSc2mA4DZtiVfckQHo=
 github.com/derekparker/trie v0.0.0-20190322172448-1ce4922c7ad9/go.mod h1:D6ICZm05D9VN1n/8iOtBxLpXtoGp6HDFUJ1RNVieOSE=
+github.com/fatih/color v1.6.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
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+github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
+golang.org/x/crypto v0.0.0-20180505025534-4ec37c66abab/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/crypto v0.0.0-20181203042331-505ab145d0a9/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c h1:Vj5n4GlwjmQteupaxJ9+0FNOmBrHfq7vN4btdGoDZgI=
+golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/net v0.0.0-20170915142106-8351a756f30f/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190327091125-710a502c58a2 h1:17UhVDrPb40BH5k6cyeb2V/7QlBNdo/a0+r0dtK+Utw=
 golang.org/x/net v0.0.0-20190327091125-710a502c58a2/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190328230028-74de082e2cca h1:hyA6yiAgbUwuWqtscNvWAI7U1CtlaD1KilQ6iudt1aI=
+golang.org/x/net v0.0.0-20190328230028-74de082e2cca/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6 h1:bjcUS9ztw9kFmmIxJInhon/0Is3p+EHBKNgquIzo1OI=
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20171026204733-164713f0dfce/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190322080309-f49334f85ddc/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.0.0-20170915090833-1cbadb444a80/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/tools v0.0.0-20170915040203-e531a2a1c15f/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20181117154741-2ddaf7f79a09/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20181205014116-22934f0fdb62/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190110163146-51295c7ec13a/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190121143147-24cd39ecf745/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190125232054-379209517ffe/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190213192042-740235f6c0d8/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+gopkg.in/airbrake/gobrake.v2 v2.0.9/go.mod h1:/h5ZAUhDkGaJfjzjKLSjv6zCL6O0LLBxU4K+aSYdM/U=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2/go.mod h1:Xk6kEKp8OKb+X14hQBKWaSkCsqBpgog8nAV2xsGOxlo=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed/go.mod h1:Xkxe497xwlCKkIaQYRfC7CSLworTXY9RMqwhhCm+8Nc=
+mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b/go.mod h1:2odslEg/xrtNQqCYg2/jCoyKnw3vv5biOc3JnIcYfL4=
+mvdan.cc/unparam v0.0.0-20190124213536-fbb59629db34/go.mod h1:H6SUd1XjIs+qQCyskXg5OFSrilMRUkD8ePJpHKDPaeY=
+mvdan.cc/unparam v0.0.0-20190310220240-1b9ccfa71afe/go.mod h1:BnhuWBAqxH3+J5bDybdxgw5ZfS+DsVd4iylsKQePN8o=
+sourcegraph.com/sourcegraph/go-diff v0.5.1-0.20190210232911-dee78e514455/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck=
+sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=
+sourcegraph.com/sqs/pbtypes v1.0.0/go.mod h1:3AciMUv4qUuRHRHhOG4TZOB+72GdPVz5k+c648qsFS4=
--- a/pkg/compiler/result.go
+++ b/pkg/compiler/result.go
@@ -7,10 +7,6 @@ type result struct {
 	err  error
 }

-func newResult(data interface{}, err error) *result {
-	return &result{data, err}
-}
-
 func newResultFrom(fn visitorFn) *result {
 	out, err := fn()

--- a/pkg/compiler/visitor.go
+++ b/pkg/compiler/visitor.go
@@ -2,6 +2,9 @@ package compiler

 import (
 	"fmt"
+	"strconv"
+	"strings"
+
 	"github.com/MontFerret/ferret/pkg/parser/fql"
 	"github.com/MontFerret/ferret/pkg/runtime"
 	"github.com/MontFerret/ferret/pkg/runtime/collections"
@@ -12,8 +15,6 @@ import (
 	"github.com/MontFerret/ferret/pkg/runtime/expressions/operators"
 	"github.com/antlr/antlr4/runtime/Go/antlr"
 	"github.com/pkg/errors"
-	"strconv"
-	"strings"
 )

 type (
@@ -193,6 +194,10 @@ func (v *visitor) doVisitForExpression(ctx *fql.ForExpressionContext, scope *sco
 		srcExp,
 	)

+	if err != nil {
+		return nil, err
+	}
+
 	// Clauses.
 	// We put clauses parsing before parsing the query body because COLLECT clause overrides scope variables
 	for _, e := range ctx.AllForExpressionBody() {
@@ -810,11 +815,12 @@ func (v *visitor) doVisitObjectLiteral(ctx *fql.ObjectLiteralContext, scope *sco
 		computedProp := assignment.ComputedPropertyName()
 		shortHand := assignment.ShorthandPropertyName()

-		if prop != nil {
+		switch {
+		case prop != nil:
 			name, err = v.doVisitPropertyNameContext(prop.(*fql.PropertyNameContext), scope)
-		} else if computedProp != nil {
+		case computedProp != nil:
 			name, err = v.doVisitComputedPropertyNameContext(computedProp.(*fql.ComputedPropertyNameContext), scope)
-		} else {
+		default:
 			name, err = v.doVisitShorthandPropertyNameContext(shortHand.(*fql.ShorthandPropertyNameContext), scope)
 		}

@@ -943,7 +949,7 @@ func (v *visitor) doVisitStringLiteral(ctx *fql.StringLiteralContext) (core.Expr
 }

 func (v *visitor) doVisitBooleanLiteral(ctx *fql.BooleanLiteralContext) (core.Expression, error) {
-	return literals.NewBooleanLiteral(strings.ToUpper(ctx.GetText()) == "TRUE"), nil
+	return literals.NewBooleanLiteral(strings.EqualFold(ctx.GetText(), "TRUE")), nil
 }

 func (v *visitor) doVisitNoneLiteral(_ *fql.NoneLiteralContext) (core.Expression, error) {
@@ -1205,14 +1211,19 @@ func (v *visitor) doVisitArrayOperator(ctx *fql.ExpressionContext, scope *scope)
 	var comparator core.OperatorExpression
 	var err error

-	if ctx.InOperator() != nil {
+	switch {
+	case ctx.InOperator() != nil:
 		comparator, err = v.doVisitInOperator(ctx, scope)
-	} else if ctx.EqualityOperator() != nil {
+	case ctx.EqualityOperator() != nil:
 		comparator, err = v.doVisitEqualityOperator(ctx, scope)
-	} else {
+	default:
 		return nil, v.unexpectedToken(ctx)
 	}

+	if err != nil {
+		return nil, err
+	}
+
 	exps, err := v.doVisitAllExpressions(ctx.AllExpression(), scope)

 	if err != nil {
--- a/pkg/drivers/cdp/document.go
+++ b/pkg/drivers/cdp/document.go
@@ -963,6 +963,10 @@ func (doc *HTMLDocument) PrintToPDF(ctx context.Context, params drivers.PDFParam
 func (doc *HTMLDocument) CaptureScreenshot(ctx context.Context, params drivers.ScreenshotParams) (values.Binary, error) {
 	metrics, err := doc.client.Page.GetLayoutMetrics(ctx)

+	if err != nil {
+		return values.NewBinary(nil), err
+	}
+
 	if params.Format == drivers.ScreenshotFormatJPEG && params.Quality < 0 && params.Quality > 100 {
 		params.Quality = 100
 	}
--- a/pkg/drivers/cdp/element.go
+++ b/pkg/drivers/cdp/element.go
@@ -973,7 +973,11 @@ func (el *HTMLElement) Select(ctx context.Context, value *values.Array) (*values
 		false,
 	)

-	el.client.DOM.RemoveAttribute(ctx, dom.NewRemoveAttributeArgs(el.id.nodeID, attrID))
+	if err != nil {
+		return nil, err
+	}
+
+	err = el.client.DOM.RemoveAttribute(ctx, dom.NewRemoveAttributeArgs(el.id.nodeID, attrID))

 	if err != nil {
 		return nil, err
@@ -1022,7 +1026,11 @@ func (el *HTMLElement) ScrollIntoView(ctx context.Context) error {
 			id.String(),
 		), false, false)

-	el.client.DOM.RemoveAttribute(ctx, dom.NewRemoveAttributeArgs(el.id.nodeID, attrID))
+	if err != nil {
+		return err
+	}
+
+	err = el.client.DOM.RemoveAttribute(ctx, dom.NewRemoveAttributeArgs(el.id.nodeID, attrID))

 	return err
 }
--- a/pkg/drivers/cdp/events/broker.go
+++ b/pkg/drivers/cdp/events/broker.go
@@ -2,10 +2,11 @@ package events

 import (
 	"context"
-	"github.com/MontFerret/ferret/pkg/drivers"
 	"reflect"
 	"sync"

+	"github.com/MontFerret/ferret/pkg/drivers"
+
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/mafredri/cdp/protocol/dom"
 	"github.com/mafredri/cdp/protocol/page"
@@ -30,16 +31,16 @@ type (
 	}
 )

-var (
+const (
 	//revive:disable-next-line:var-declaration
-	EventError                 Event = 0
-	EventLoad                  Event = 1
-	EventReload                Event = 2
-	EventAttrModified          Event = 3
-	EventAttrRemoved           Event = 4
-	EventChildNodeCountUpdated Event = 5
-	EventChildNodeInserted     Event = 6
-	EventChildNodeRemoved      Event = 7
+	EventError = Event(iota)
+	EventLoad
+	EventReload
+	EventAttrModified
+	EventAttrRemoved
+	EventChildNodeCountUpdated
+	EventChildNodeInserted
+	EventChildNodeRemoved
 )

 func NewEventBroker(
--- a/pkg/drivers/cdp/helpers.go
+++ b/pkg/drivers/cdp/helpers.go
@@ -89,11 +89,12 @@ func computeQuadArea(quads []Quad) float64 {
 func getClickablePoint(ctx context.Context, client *cdp.Client, id *HTMLElementIdentity) (Quad, error) {
 	qargs := dom.NewGetContentQuadsArgs()

-	if id.objectID != "" {
+	switch {
+	case id.objectID != "":
 		qargs.SetObjectID(id.objectID)
-	} else if id.backendID != 0 {
+	case id.backendID != 0:
 		qargs.SetBackendNodeID(id.backendID)
-	} else {
+	default:
 		qargs.SetNodeID(id.nodeID)
 	}

@@ -168,9 +169,10 @@ func parseAttrs(attrs []string) *values.Object {
 func loadInnerHTML(ctx context.Context, client *cdp.Client, id *HTMLElementIdentity) (values.String, error) {
 	var objID runtime.RemoteObjectID

-	if id.objectID != "" {
+	switch {
+	case id.objectID != "":
 		objID = id.objectID
-	} else if id.backendID > 0 {
+	case id.backendID > 0:
 		repl, err := client.DOM.ResolveNode(ctx, dom.NewResolveNodeArgs().SetBackendNodeID(id.backendID))

 		if err != nil {
@@ -182,7 +184,7 @@ func loadInnerHTML(ctx context.Context, client *cdp.Client, id *HTMLElementIdent
 		}

 		objID = *repl.Object.ObjectID
-	} else {
+	default:
 		repl, err := client.DOM.ResolveNode(ctx, dom.NewResolveNodeArgs().SetNodeID(id.nodeID))

 		if err != nil {
@@ -219,9 +221,10 @@ func loadInnerHTML(ctx context.Context, client *cdp.Client, id *HTMLElementIdent
 func loadInnerText(ctx context.Context, client *cdp.Client, id *HTMLElementIdentity) (values.String, error) {
 	var objID runtime.RemoteObjectID

-	if id.objectID != "" {
+	switch {
+	case id.objectID != "":
 		objID = id.objectID
-	} else if id.backendID > 0 {
+	case id.backendID > 0:
 		repl, err := client.DOM.ResolveNode(ctx, dom.NewResolveNodeArgs().SetBackendNodeID(id.backendID))

 		if err != nil {
@@ -233,7 +236,7 @@ func loadInnerText(ctx context.Context, client *cdp.Client, id *HTMLElementIdent
 		}

 		objID = *repl.Object.ObjectID
-	} else {
+	default:
 		repl, err := client.DOM.ResolveNode(ctx, dom.NewResolveNodeArgs().SetNodeID(id.nodeID))

 		if err != nil {
@@ -416,8 +419,6 @@ func fromDriverCookie(url string, cookie drivers.HTTPCookie) network.CookieParam
 		sameSite = network.CookieSameSiteLax
 	case drivers.SameSiteStrictMode:
 		sameSite = network.CookieSameSiteStrict
-	default:
-		sameSite = network.CookieSameSiteNotSet
 	}

 	if cookie.Expires == emptyExpires {
@@ -456,13 +457,8 @@ func toDriverCookie(c network.Cookie) drivers.HTTPCookie {
 	switch c.SameSite {
 	case network.CookieSameSiteLax:
 		sameSite = drivers.SameSiteLaxMode
-		break
 	case network.CookieSameSiteStrict:
 		sameSite = drivers.SameSiteStrictMode
-		break
-	default:
-		sameSite = drivers.SameSiteDefaultMode
-		break
 	}

 	return drivers.HTTPCookie{
--- a/pkg/runtime/collections/collection.go
+++ b/pkg/runtime/collections/collection.go
@@ -2,6 +2,7 @@ package collections

 import (
 	"context"
+
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
 )
@@ -34,11 +35,7 @@ type (
 	}
 )

-func NewCoreIterator(
-	valVar,
-	keyVar string,
-	values core.Iterator,
-) (Iterator, error) {
+func NewCoreIterator(valVar, keyVar string, values core.Iterator) (Iterator, error) {
 	return &coreIterator{valVar, keyVar, values}, nil
 }

--- a/pkg/runtime/collections/filter.go
+++ b/pkg/runtime/collections/filter.go
@@ -2,6 +2,7 @@ package collections

 import (
 	"context"
+
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 )

@@ -38,8 +39,13 @@ func (iterator *FilterIterator) Next(ctx context.Context, scope *core.Scope) (*c
 			return nil, nil
 		}

+		// TODO: test case when predicate return not nil
 		take, err := iterator.predicate(ctx, nextScope)

+		if err != nil {
+			return nil, err
+		}
+
 		if take == true {
 			return nextScope, nil
 		}
--- a/pkg/runtime/collections/filter_test.go
+++ b/pkg/runtime/collections/filter_test.go
@@ -3,12 +3,13 @@ package collections_test
 import (
 	"context"
 	"encoding/json"
+	"math"
+	"testing"
+
 	"github.com/MontFerret/ferret/pkg/runtime/collections"
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
 	. "github.com/smartystreets/goconvey/convey"
-	"math"
-	"testing"
 )

 func TestFilter(t *testing.T) {
@@ -23,7 +24,7 @@ func TestFilter(t *testing.T) {

 		predicate := func(_ context.Context, scope *core.Scope) (bool, error) {
 			i := float64(scope.MustGetVariable(collections.DefaultValueVar).Unwrap().(int))
-			calc := float64(i / 2)
+			calc := i / 2

 			return calc == math.Floor(calc), nil
 		}
@@ -58,7 +59,7 @@ func TestFilter(t *testing.T) {
 				return false, nil
 			}

-			calc := float64(i / 2)
+			calc := i / 2

 			return calc == math.Floor(calc), nil
 		}
--- a/pkg/runtime/collections/sort.go
+++ b/pkg/runtime/collections/sort.go
@@ -2,9 +2,10 @@ package collections

 import (
 	"context"
-	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"sort"
 	"strings"
+
+	"github.com/MontFerret/ferret/pkg/runtime/core"
 )

 type (
@@ -32,7 +33,7 @@ const (
 )

 func SortDirectionFromString(str string) SortDirection {
-	if strings.ToUpper(str) == "DESC" {
+	if strings.EqualFold(str, "DESC") {
 		return SortDirectionDesc
 	}

@@ -136,7 +137,7 @@ func (iterator *SortIterator) sort(ctx context.Context, scope *core.Scope) ([]*c
 				break
 			}

-			eq = eq * int64(comp.direction)
+			eq *= int64(comp.direction)

 			if eq == -1 {
 				out = true
--- a/pkg/runtime/core/errors.go
+++ b/pkg/runtime/core/errors.go
@@ -2,8 +2,9 @@ package core

 import (
 	"fmt"
-	"github.com/pkg/errors"
 	"strings"
+
+	"github.com/pkg/errors"
 )

 var (
--- a/pkg/runtime/core/scope.go
+++ b/pkg/runtime/core/scope.go
@@ -25,9 +25,7 @@ func NewRootScope() (*Scope, CloseFunc) {
 		disposables: make([]io.Closer, 0, 10),
 	}

-	return newScope(root, nil), func() error {
-		return root.Close()
-	}
+	return newScope(root, nil), root.Close
 }

 func (s *RootScope) AddDisposable(disposable io.Closer) {
--- a/pkg/runtime/expressions/clauses/collect.go
+++ b/pkg/runtime/expressions/clauses/collect.go
@@ -2,6 +2,7 @@ package clauses

 import (
 	"context"
+
 	"github.com/MontFerret/ferret/pkg/runtime/collections"
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 )
@@ -56,24 +57,26 @@ func NewCollect(
 			return collect, nil
 		}

-		if projection != nil && count == nil && aggregate == nil {
+		switch {
+		case projection != nil && count == nil && aggregate == nil:
 			collect.group.projection = projection
-		} else if projection == nil && count != nil && aggregate == nil {
+		case projection == nil && count != nil && aggregate == nil:
 			collect.group.count = count
-		} else if projection == nil && count == nil && aggregate != nil {
+		case projection == nil && count == nil && aggregate != nil:
 			collect.group.aggregate = aggregate
-		} else {
+		default:
 			return nil, core.Error(core.ErrInvalidOperation, "projection, count and aggregate cannot be used together")
 		}

 		return collect, nil
 	}

-	if count == nil && aggregate != nil {
+	switch {
+	case count == nil && aggregate != nil:
 		collect.aggregate = aggregate
-	} else if count != nil && aggregate == nil {
+	case count != nil && aggregate == nil:
 		collect.count = count
-	} else {
+	default:
 		return nil, core.Error(core.ErrInvalidOperation, "count and aggregate cannot be used together")
 	}

--- a/pkg/runtime/expressions/clauses/limit.go
+++ b/pkg/runtime/expressions/clauses/limit.go
@@ -59,11 +59,7 @@ func (clause *LimitClause) Iterate(ctx context.Context, scope *core.Scope) (coll
 		return nil, err
 	}

-	iterator, err := collections.NewLimitIterator(
-		src,
-		int(countInt),
-		int(offsetInt),
-	)
+	iterator, err := collections.NewLimitIterator(src, countInt, offsetInt)

 	if err != nil {
 		return nil, core.SourceError(clause.src, err)
--- a/pkg/runtime/expressions/param_test.go
+++ b/pkg/runtime/expressions/param_test.go
@@ -2,9 +2,10 @@ package expressions_test

 import (
 	"context"
-	"github.com/MontFerret/ferret/pkg/runtime/values/types"
 	"testing"

+	"github.com/MontFerret/ferret/pkg/runtime/values/types"
+
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/expressions"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
@@ -49,6 +50,7 @@ func TestParameterExpressionExec(t *testing.T) {
 	Convey("Should not exec a missing parameter expression", t, func() {
 		sourceMap := core.NewSourceMap("test", 1, 10)
 		notExistExp, err := expressions.NewParameterExpression(sourceMap, "param2")
+		So(err, ShouldBeNil)

 		params := make(map[string]core.Value)
 		params["param1"] = values.NewInt(1)
--- a/pkg/runtime/values/int.go
+++ b/pkg/runtime/values/int.go
@@ -23,19 +23,19 @@ func ParseInt(input interface{}) (Int, error) {
 		return ZeroInt, nil
 	}

-	switch input.(type) {
+	switch val := input.(type) {
 	case int:
-		return Int(input.(int)), nil
+		return Int(val), nil
 	case int64:
-		return Int(input.(int64)), nil
+		return Int(val), nil
 	case int32:
-		return Int(input.(int32)), nil
+		return Int(val), nil
 	case int16:
-		return Int(input.(int16)), nil
+		return Int(val), nil
 	case int8:
-		return Int(input.(int8)), nil
+		return Int(val), nil
 	case string:
-		i, err := strconv.Atoi(input.(string))
+		i, err := strconv.Atoi(val)

 		if err == nil {
 			if i == 0 {
--- a/pkg/stdlib/arrays/push.go
+++ b/pkg/stdlib/arrays/push.go
@@ -45,7 +45,7 @@ func Push(_ context.Context, args ...core.Value) (core.Value, error) {

 	arr.ForEach(func(item core.Value, idx int) bool {
 		if uniq && push {
-			push = !(item.Compare(value) == 0)
+			push = item.Compare(value) != 0
 		}

 		result.Push(item)
--- a/pkg/stdlib/datetime/compare.go
+++ b/pkg/stdlib/datetime/compare.go
@@ -36,9 +36,12 @@ func DateCompare(_ context.Context, args ...core.Value) (core.Value, error) {
 	rangeEnd := values.NewString("millisecond")

 	if len(args) == 4 {
-		if err = core.ValidateType(args[3], types.String); err != nil {
+		err = core.ValidateType(args[3], types.String)
+
+		if err != nil {
 			return values.None, err
 		}
+
 		rangeEnd = args[3].(values.String)
 	}

--- a/pkg/stdlib/html/document.go
+++ b/pkg/stdlib/html/document.go
@@ -151,12 +151,7 @@ func newDocLoadParams(url values.String, arg core.Value) (DocumentLoadParams, er
 				return res, err
 			}

-			header, err := parseHeader(header.(*values.Object))
-
-			if err != nil {
-				return res, err
-			}
-
+			header := parseHeader(header.(*values.Object))
 			res.Header = header
 		}

@@ -203,7 +198,9 @@ func parseCookies(arr *values.Array) ([]drivers.HTTPCookie, error) {
 func parseCookie(value core.Value) (drivers.HTTPCookie, error) {
 	var err error

-	if err = core.ValidateType(value, types.Object, drivers.HTTPCookieType); err != nil {
+	err = core.ValidateType(value, types.Object, drivers.HTTPCookieType)
+
+	if err != nil {
 		return drivers.HTTPCookie{}, err
 	}

@@ -291,7 +288,7 @@ func parseCookie(value core.Value) (drivers.HTTPCookie, error) {
 	return cookie, err
 }

-func parseHeader(header *values.Object) (drivers.HTTPHeader, error) {
+func parseHeader(header *values.Object) drivers.HTTPHeader {
 	res := make(drivers.HTTPHeader)

 	header.ForEach(func(value core.Value, key string) bool {
@@ -300,5 +297,5 @@ func parseHeader(header *values.Object) (drivers.HTTPHeader, error) {
 		return true
 	})

-	return res, nil
+	return res
 }
--- a/pkg/stdlib/math/median.go
+++ b/pkg/stdlib/math/median.go
@@ -33,21 +33,18 @@ func Median(_ context.Context, args ...core.Value) (core.Value, error) {

 	var median core.Value

-	if l == 0 {
+	switch {
+	case l == 0:
 		return values.NewFloat(math.NaN()), nil
-	} else if l%2 == 0 {
+	case l%2 == 0:
 		median, err = mean(sorted.Slice(l/2-1, l/2+1))

 		if err != nil {
 			return values.None, nil
 		}
-	} else {
+	default:
 		median = sorted.Get(l / 2)
 	}

-	if err != nil {
-		return values.None, nil
-	}
-
 	return median, nil
 }
--- a/pkg/stdlib/math/percentile.go
+++ b/pkg/stdlib/math/percentile.go
@@ -70,21 +70,16 @@ func Percentile(_ context.Context, args ...core.Value) (core.Value, error) {
 	var percentile core.Value

 	// Check if the index is a whole number
-	if index == even {
-
-		// Convert float to int
+	switch {
+	case index == even:
 		i := values.Int(index)
-
-		// Find the value at the index
 		percentile = sorted.Get(i - 1)
-	} else if index > 1 {
-
+	case index > 1:
 		// Convert float to int via truncation
 		i := values.Int(index)
-
 		// Find the average of the index and following values
 		percentile, _ = mean(values.NewArrayWith(sorted.Get(i-1), sorted.Get(i)))
-	} else {
+	default:
 		return values.NewFloat(math.NaN()), errors.New("input is outside of range")
 	}

--- a/pkg/stdlib/math/stddev_population.go
+++ b/pkg/stdlib/math/stddev_population.go
@@ -32,11 +32,7 @@ func StandardDeviationPopulation(_ context.Context, args ...core.Value) (core.Va
 		return values.NewFloat(math.NaN()), nil
 	}

-	vp, err := variance(arr, values.NewInt(0))
-
-	if err != nil {
-		return values.NewFloat(math.NaN()), err
-	}
+	vp := variance(arr, values.NewInt(0))

 	return values.NewFloat(math.Pow(float64(vp), 0.5)), nil
 }
--- a/pkg/stdlib/math/stddev_sample.go
+++ b/pkg/stdlib/math/stddev_sample.go
@@ -32,11 +32,7 @@ func StandardDeviationSample(_ context.Context, args ...core.Value) (core.Value,
 		return values.NewFloat(math.NaN()), nil
 	}

-	vp, err := variance(arr, values.NewInt(1))
-
-	if err != nil {
-		return values.NewFloat(math.NaN()), err
-	}
+	vp := variance(arr, values.NewInt(1))

 	return values.NewFloat(math.Pow(float64(vp), 0.5)), nil
 }
--- a/pkg/stdlib/math/variance.go
+++ b/pkg/stdlib/math/variance.go
@@ -8,9 +8,9 @@ import (
 	"github.com/MontFerret/ferret/pkg/runtime/values/types"
 )

-func variance(input *values.Array, sample values.Int) (values.Float, error) {
+func variance(input *values.Array, sample values.Int) values.Float {
 	if input.Length() == 0 {
-		return values.NewFloat(math.NaN()), nil
+		return values.NewFloat(math.NaN())
 	}

 	m, _ := mean(input)
@@ -37,5 +37,5 @@ func variance(input *values.Array, sample values.Int) (values.Float, error) {
 	// or population and wether to subtract by one or not
 	l := values.Float(input.Length() - (1 * sample))

-	return variance / l, nil
+	return variance / l
 }
--- a/pkg/stdlib/math/variance_population.go
+++ b/pkg/stdlib/math/variance_population.go
@@ -32,5 +32,5 @@ func PopulationVariance(_ context.Context, args ...core.Value) (core.Value, erro
 		return values.NewFloat(math.NaN()), nil
 	}

-	return variance(arr, values.NewInt(0))
+	return variance(arr, values.NewInt(0)), nil
 }
--- a/pkg/stdlib/math/variance_sample.go
+++ b/pkg/stdlib/math/variance_sample.go
@@ -32,5 +32,5 @@ func SampleVariance(_ context.Context, args ...core.Value) (core.Value, error) {
 		return values.NewFloat(math.NaN()), nil
 	}

-	return variance(arr, values.NewInt(1))
+	return variance(arr, values.NewInt(1)), nil
 }
--- a/pkg/stdlib/objects/zip.go
+++ b/pkg/stdlib/objects/zip.go
@@ -22,7 +22,9 @@ func Zip(_ context.Context, args ...core.Value) (core.Value, error) {
 	}

 	for _, arg := range args {
-		if err = core.ValidateType(arg, types.Array); err != nil {
+		err = core.ValidateType(arg, types.Array)
+
+		if err != nil {
 			return values.None, err
 		}
 	}
--- a/pkg/stdlib/strings/encode.go
+++ b/pkg/stdlib/strings/encode.go
@@ -88,5 +88,5 @@ func ToBase64(_ context.Context, args ...core.Value) (core.Value, error) {
 	value := args[0].String()
 	out := base64.StdEncoding.EncodeToString([]byte(value))

-	return values.NewString(string(out)), nil
+	return values.NewString(out), nil
 }
--- a/pkg/stdlib/strings/find.go
+++ b/pkg/stdlib/strings/find.go
@@ -29,7 +29,7 @@ func FindFirst(_ context.Context, args ...core.Value) (core.Value, error) {
 	runes := []rune(text)
 	search := args[1].String()
 	start := values.NewInt(0)
-	end := values.NewInt(int(len(text)))
+	end := values.NewInt(len(text))

 	if argsCount == 3 {
 		arg3 := args[2]
@@ -76,7 +76,7 @@ func FindLast(_ context.Context, args ...core.Value) (core.Value, error) {
 	runes := []rune(text)
 	search := args[1].String()
 	start := values.NewInt(0)
-	end := values.NewInt(int(len(text)))
+	end := values.NewInt(len(text))

 	if argsCount == 3 {
 		arg3 := args[2]
--- a/pkg/stdlib/strings/fmt.go
+++ b/pkg/stdlib/strings/fmt.go
@@ -36,10 +36,7 @@ func Fmt(_ context.Context, args ...core.Value) (core.Value, error) {
 }

 func format(template string, args []core.Value) (string, error) {
-	rgx, err := regexp.Compile("{[0-9]*}")
-	if err != nil {
-		return "", errors.Errorf("failed to build regexp: %v", err)
-	}
+	rgx := regexp.MustCompile("{[0-9]*}")

 	argsCount := len(args)
 	emptyBracketsCount := strings.Count(template, "{}")
@@ -53,6 +50,7 @@ func format(template string, args []core.Value) (string, error) {
 	// index of the last value
 	// inserted into the template
 	var lastArgIdx int
+	var err error

 	template = rgx.ReplaceAllStringFunc(template, func(s string) string {
 		if err != nil {
--- a/pkg/stdlib/strings/like.go
+++ b/pkg/stdlib/strings/like.go
@@ -43,15 +43,17 @@ func Like(_ context.Context, args ...core.Value) (core.Value, error) {

 	for i := 1; i < len(str)+1; i++ {
 		for j := 1; j < len(pattern)+1; j++ {
-			if pattern[j-1] == '%' {
+			switch {
+			case pattern[j-1] == '%':
 				lookup[i][j] = lookup[i][j-1] || lookup[i-1][j]
-			} else if pattern[j-1] == '_' || str[i-1] == pattern[j-1] {
+			case pattern[j-1] == '_' || str[i-1] == pattern[j-1]:
 				lookup[i][j] = lookup[i-1][j-1]
-			} else if len(args) > 2 {
-				if args[2] == values.True && unicode.ToLower(str[i-1]) == unicode.ToLower(pattern[j-1]) {
+			case len(args) > 2:
+				isEq := unicode.ToLower(str[i-1]) == unicode.ToLower(pattern[j-1])
+				if args[2] == values.True && isEq {
 					lookup[i][j] = lookup[i-1][j-1]
 				}
-			} else {
+			default:
 				lookup[i][j] = false
 			}
 		}
--- a/pkg/stdlib/strings/regex.go
+++ b/pkg/stdlib/strings/regex.go
@@ -55,7 +55,7 @@ func RegexMatch(_ context.Context, args ...core.Value) (core.Value, error) {
 // @param regex (String) - A regular expression to use for splitting the text.
 // @param caseInsensitive (Boolean) - If set to true, the matching will be case-insensitive. The default is false.
 // @param limit (Int) - Limit the number of split values in the result. If no limit is given, the number of splits returned is not bounded.
-// @return (Array) - An array of strings splited by teh expression.
+// @return (Array) - An array of strings splited by the expression.
 func RegexSplit(_ context.Context, args ...core.Value) (core.Value, error) {
 	err := core.ValidateArgs(args, 2, 4)

--- a/pkg/stdlib/strings/substr.go
+++ b/pkg/stdlib/strings/substr.go
@@ -103,7 +103,7 @@ func Right(_ context.Context, args ...core.Value) (core.Value, error) {
 	}

 	if len(text) < pos {
-		return values.NewString(string(text)), nil
+		return values.NewString(text), nil
 	}

 	return values.NewStringFromRunes(runes[size-pos : size]), nil