staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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wojteklu

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

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General rules

1. Follow standard conventions.
2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

Design rules

bpsib

#EXTM3U
#EXTINF:-1,BBC - Radio 1
http://as-hls-ww-live.akamaized.net/pool_904/live/ww/bbc_radio_one/bbc_radio_one.isml/bbc_radio_one-audio%3d96000.norewind.m3u8
#EXTINF:-1,BBC - Radio 1Xtra
http://as-hls-ww-live.akamaized.net/pool_904/live/ww/bbc_1xtra/bbc_1xtra.isml/bbc_1xtra-audio%3d96000.norewind.m3u8
#EXTINF:-1,BBC - Radio 1Dance
http://as-hls-ww-live.akamaized.net/pool_904/live/ww/bbc_radio_one_dance/bbc_radio_one_dance.isml/bbc_radio_one_dance-audio%3d96000.norewind.m3u8
#EXTINF:-1,BBC - Radio 1Relax
http://as-hls-ww-live.akamaized.net/pool_904/live/ww/bbc_radio_one_relax/bbc_radio_one_relax.isml/bbc_radio_one_relax-audio%3d96000.norewind.m3u8
#EXTINF:-1,BBC - Radio 2

gre

/*
 * This work is free. You can redistribute it and/or modify it under the
 * terms of the Do What The Fuck You Want To Public License, Version 2,
 * as published by Sam Hocevar. See the COPYING file for more details.
 */
/*
 * Easing Functions - inspired from http://gizma.com/easing/
 * only considering the t value for the range [0, 1] => [0, 1]
 */
EasingFunctions = {

mnutt

Instrument Anything in Rails 3

With Rails 3.0 released a few weeks ago I've migrated a few apps and I'm constantly finding useful new improvements. One such improvement is the ability to log anything in the same way that Rails internally logs ActiveRecord and ActionView. By default Rails 3 logs look slightly spiffier than those produced by Rails 2.3: (notice the second line has been cleaned up)

Started GET "/" for 127.0.0.1 at Mon Sep 06 01:07:11 -0400 2010
  Processing by HomeController#index as HTML
  User Load (0.2ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 3) LIMIT 1
  CACHE (0.0ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 3) LIMIT 1

Rendered layouts/_nav.html.erb (363.4ms)

mbbx6spp

module Main where

import Test.QuickCheck (quickCheck)
import Your.Module (encrypt, decrypt)

prop_reverseReverse :: [Char] -> Bool
prop_reverseReverse s = (reverse . reverse) s == s

prop_encryptDecrypt :: [Char] -> Bool
prop_encryptDecrypt s = (encrypt . decrypt) s == s

rbnpi

Tuning Sonic Pi for best performance

Several of the programs I write for Sonic Pi push it fairly close to the limit when run on a Raspberry Pi. This note gives some tips on to how to maximise the performance on that platform. Of course, if you run Sonic Pi on Mac OSX,or a Windows PC then the performance is much better on these more powerful platforms and some of the issues may not arise.

Over-clocking your Pi

By increasing the voltage applied to the Pi processor, and running it at a higher clock frequency than normal it is possible to achive significant gains in performance. The down side is that you may reduce the lifetime of your Pi. There are five levels that can be configured: None, Modest, Medium, High and Turbo. I routinely run my Raspberry Pis with Medium Overclocking and have noticed no ill effects on any of them.

If you wish to apply some over-clocking you do so by running the program raspi-config from the command line. Having logged on, from the command line before you start the gra

manoloide

import bpy
import random
import math

# random seed
seed = random.randint(0, 99999);


def main():

topshed

Getting started

Two LEDs on a breadboard

Buttons and Serial Monitor

Analog Inputs

Analog temperature sensor

daid

#include "DMXSerial.h"

/*
Simple example of using the DMSSerial library in combination with EE's hardware configuration to provide 4 relay outputs that can be used to show game states.
This is using the Arduino relay board from: https://www.seeedstudio.com/item_detail.html?p_id=2440
 */

void setup()
{
    DMXSerial.init(DMXReceiver);