underscore is a Go library providing useful functional programming helpers without extending any built-in objects.

It is mostly a port from the underscore.js library based on generics brought by Go 1.18.

📚 Follow this link for the documentation.

Install the library using

go get github.com/rjNemo/underscore@0.4.0

Please check out the examples to see how to use the library.

package main
import (
 "fmt"
 u "github.com/rjNemo/underscore"
)
func main() {
 numbers := []int{1, 2, 3, 4, 5, 6, 7, 8, 9}
 // filter even numbers from the slice
 evens := u.Filter(numbers, func(n int) bool { return n%2 == 0 })
 // square every number in the slice
 squares := u.Map(evens, func(n int) int { return n * n })
 // reduce to the sum
 res := u.Reduce(squares, func(n, acc int) int { return n + acc }, 0)
 fmt.Println(res) // 120
}

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.

You need at least go1.24 for development. The project is shipped with a Dockerfile based on go1.24.

If you prefer local development, navigate to the official download page and install version 1.24 or beyond.

First clone the repository

git clone https://github.com/rjNemo/underscore.git

Install dependencies

go mod download

And that's it.

To run the unit tests, you can simply run:

make test

underscore provides many of functions that support your favorite functional helpers

• All
• Any
• Contains (only numerics values at the moment)
• Each
• Filter
• Flatmap
• GroupBy
• Find
• Map
• Max
• Min
• Partition
• Reduce

Calling NewPipe will cause all future method calls to return wrapped values. When you've finished the computation, call Value to retrieve the final value.

Methods not returning a slice such as Reduce, All, Any, will break the Chain and return Value instantly.

• Go - Build fast, reliable, and efficient software at scale

Please read CONTRIBUTING.md for details on our code of conduct, and the process for submitting pull requests to us.

We use SemVer for versioning. For the versions available, see the tags on this repository.

• Ruidy - Initial work - Ruidy

See also the list of contributors who participated in this project.

This project is licensed under the MIT License - see the LICENSE.md file for details

This project is largely inspired by Underscore.js library. Check out the original project if you don't already know it.