feat: map

.gitignore

@@ -0,0 +1,59 @@
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+.history/
+.idea/
+cmake-build-*/
+*.iws
+out/
+.idea_modules/
+atlassian-ide-plugin.xml
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+*~
+.fuse_hidden*
+.directory
+.Trash-*
+.nfs*
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+*.test
+*.out
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+*.stackdump
+[Dd]esktop.ini
+$RECYCLE.BIN/
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+*.lnk
+.DS_Store
+.AppleDouble
+.LSOverride
+Icon
+._*
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk

.golangci.yml

@@ -0,0 +1,42 @@
+skip-dirs-use-default: true
+
+run:
+  timeout: 5m
+
+linters:
+  enable:
+    - bodyclose
+    - deadcode
+    - depguard
+    - dogsled
+    - errcheck
+    - errorlint
+    - exportloopref
+    - gocritic
+    - gocyclo
+    - gofmt
+    - goimports
+    - goprintffuncname
+    - gosimple
+    - gosec
+    - govet
+    - ineffassign
+    - misspell
+    - noctx
+    - nolintlint
+    - prealloc
+    - rowserrcheck
+    - staticcheck
+    - structcheck
+    - stylecheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - varcheck
+    - whitespace
+  fast: true
+
+linters-settings:
+  goimports:
+    local-prefixes: github.com/rjNemo/underscore

Dockerfile

@@ -0,0 +1,11 @@
+FROM golang:1.18beta1-bullseye
+
+WORKDIR /app
+
+COPY go.* ./
+RUN go mod download
+
+COPY *.go ./
+
+#RUN go test -json ./... -count=1 -cover | gotestfmt
+RUN go test ./...

Makefile

@@ -0,0 +1,5 @@
+lint:
+	golangci-lint run --fix
+
+test:
+	go test -json ./... -count=1 -cover | gotestfmt

README.md

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+# Underscore
+
+A port from the `underscore.js` library based on generics brought by `go1.18`.
+

go.mod

@@ -0,0 +1,11 @@
+module github.com/rjNemo/underscore
+
+go 1.18
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/objx v0.3.0 // indirect
+	github.com/stretchr/testify v1.7.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+)

go.sum

@@ -0,0 +1,15 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.3.0 h1:NGXK3lHquSN08v5vWalVI/L8XU9hdzE/G6xsrze47As=
+github.com/stretchr/objx v0.3.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v22aHH28wwpauUhK9Oo=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

map.go

@@ -0,0 +1,9 @@
+package underscore
+
+func Map[T, P any](values []T, predicate func(T) P) []P {
+	res := make([]P, 0, len(values))
+	for _, v := range values {
+		res = append(res, predicate(v))
+	}
+	return res
+}

map_test.go

@@ -0,0 +1,18 @@
+package underscore_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	u "github.com/rjNemo/underscore"
+)
+
+func TestMap(t *testing.T) {
+	nums := []int{1, 2, 3}
+	f := func(n int) int {
+		return n * n
+	}
+	want := []int{1, 4, 9}
+	assert.Equal(t, want, u.Map(nums, f))
+}