Justin Woo justinwoo

Random Nix Project Packaging (yarn2nix, bundix -l)

Setting up a nodejs project via yarn2nix in Nix for existing project

nix-shell -p yarn yarn2nix nodejs
copied the Nix skeleton files in place (./z/etc/lib/{version,nixpkgs}.nix ./z/etc/overlays/default.nix)
generated package.nix using yarn2nix
add these Nix expressions in the root

This NixOS code ensures that the system provide version-specific $LOCALE_ARCHIVE environment variables to mitigate the effects of NixOS/nixpkgs#38991.

To deploy it, copy the file into your /etc/nixos folder using a file name like multi-glibc-locale-paths.nix. Then edit your configuration.nix file to contain the attribute:

imports = [ ./multi-glibc-locale-paths.nix ];

This is a proposal for a lightning talk at the Reactive 2015 conference.

NOTE: If you like this, star ⭐ the Gist - the amount of stars decides whether it makes the cut!

The Joy of Composition

Why stateless rendering is pure bliss

React just got stateless components, meaning that they are in essence pure functions for rendering. Pure functions make it dead simple - even fun - to refactor your views

git diff ignoring certain files

What is this?

Sometimes you want to ignore certain files when you run git diff, but you still want to check them in, which means you can't capitalize on .gitignore.

This guide is here to help.

How to set it up?

2015-01-29 Unofficial Relay FAQ

Compilation of questions and answers about Relay from React.js Conf.

Disclaimer: I work on Relay at Facebook. Relay is a complex system on which we're iterating aggressively. I'll do my best here to provide accurate, useful answers, but the details are subject to change. I may also be wrong. Feedback and additional questions are welcome.

What is Relay?

Relay is a new framework from Facebook that provides data-fetching functionality for React applications. It was announced at React.js Conf (January 2015).

CSS Layout Debugger

A tweet-sized debugger for visualizing your CSS layouts. Outlines every DOM element on your page a random (valid) CSS hex color.

One-line version to paste in your DevTools

Use $$ if your browser aliases it:

~ 108 byte version

	#!/usr/bin/env bash
	#
	# Usage: callPackage [src] [...nix-build args]
	#
	# A version of nix-build that uses nixpkgs.callPackage to fill in the
	# arguments.
	#
	# * [src] can be a path or a URL. Defaults to .
	#
	# Example:

	module Algebra where

	import Prelude
	import Control.Monad.Eff (Eff)
	import Data.Maybe (Maybe(..))


	newtype ConsoleAlg f = ConsoleAlg
	{ printLn :: String -> f Unit
	, readLn :: f String

	{-# LANGUAGE ScopedTypeVariables #-}
	{-# LANGUAGE FlexibleContexts #-}

	module Test where

	import GHC.Generics
	import Data.Proxy

	typeName :: forall a. (Generic a, GTypeName (Rep a)) => Proxy a -> String
	typeName Proxy = gtypename (from (undefined :: a))