martinklepsch

Derivatives

A note on terminology: There are a lot of things with similar meanings/use-cases around: subscriptions, reactions, derived atoms, view models. I'll introduce another to make things even worse: derivative. A derivative implements IWatchable and it's value is the result of applying a function to the value of other things (sources) implementing IWatchable. Whenever any of the sources change the value if the derivative is updated.

Why this library

Let's assume you're hooked about the idea of storing all your application state in a single atom (db). (Why this is a great idea is covered elsewhere.)

Most of your components don't need the entirety of this state and instead receive a small selection of it that is enough to allow the components to do their job. Now that data is not always a subtree (i.e. (get-in db ...)) but might be a combination of various parts of your state. To transform the data in a way that it becomes useful for components you can use a function: `(f @

addyosmani

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

john2x

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

sebmarkbage

New React Element Factories and JSX

In React 0.12, we're making a core change to how React.createClass(...) and JSX works.

If you're using JSX in the typical way for all (and only) React components, then this transition will be seamless. Otherwise there are some minor breaking changes described below.

The Problem

abo-abo

select repository_name, count(repository_name) as pushes, repository_description, repository_url
from [githubarchive:github.timeline]
where type="PushEvent"
  and repository_language="Emacs Lisp"
  and parse_utc_usec(created_at) >= parse_utc_usec('2014-01-01 00:00:00')
group by repository_name, repository_description, repository_url
order by pushes desc
limit 100

petemcw

# Install `dnsmasq` and configure for *.test domains

$ brew install dnsmasq
$ vim /usr/local/etc/dnsmasq.conf

# Reload configuration and clear cache

$ sudo launchctl unload /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
$ sudo launchctl load /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
$ dscacheutil -flushcache

emacs.memory.leak.aka.distnoted.patch.diff

From 8ab91751069e391a95151c6716a546b1732ade92 Mon Sep 17 00:00:00 2001
From: JP <twitter:canoeberry>
Date: Sun, 19 Jan 2014 11:58:54 +0000
Subject: [PATCH] partial memleak fix

This patch was created by JP (twitter: @canoeberry) based on a memleak fix by Dirk (emacs committer) below:
https://github.com/mirrors/emacs/commit/57ae6509a3b6a274f89b9caea0284c6156470625

This memory leak is fixed in the trunk as of now and will be in the next official release: 24.4.

atenni

Problem: When linking to the raw version of a gist, the link changes with each revision.

Solution:

To return the first file from a gist: https://gist.github.com/[gist_user]/[gist_id]/raw/

• Example: https://gist.github.com/atenni/5604522/raw/
• Works even when you change the filename.

To get a file from multi–file gist: https://gist.github.com/[gist_user]/[gist_id]/raw/[file_name]

Idorobots

(require 'xml)

(defun assoc-or-error (what where &optional err-string)
  (or (assoc what where)
      (error (or err-string "Suddenly errors! Thousands of them!"))))

(defun google-reader-to-newsticker (filename)
  "Parses google-reader subscription XML and returns newsticker compatible feed alist."
  (with-temp-buffer
    (insert-file-contents filename)

robinsmidsrod

ddns-update-style none;
deny bootp; #default
authoritative;

include "/etc/dhcp/ipxe-option-space.conf";

# GREEN (private network)
subnet 10.1.1.0 netmask 255.255.255.0 {
    range 10.1.1.100 10.1.1.199;
    option subnet-mask 255.255.255.0;