codepreneur

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

So you're curious in learning this new thing called (Functional) Reactive Programming (FRP).

Learning it is hard, even harder by the lack of good material. When I started, I tried looking for tutorials. I found only a handful of practical guides, but they just scratched the surface and never tackled the challenge of building the whole architecture around it. Library documentations often don't help when you're trying to understand some function. I mean, honestly, look at this:

Rx.Observable.prototype.flatMapLatest(selector, [thisArg])

Projects each element of an observable sequence into a new sequence of observable sequences by incorporating the element's index and then transforms an observable sequence of observable sequences into an observable sequence producing values only from the most recent observable sequence.

codepreneur

Making Chiptune Music using Sonic Pi v2.0

Warning: this might not work on a RaspberryPi yet

I was curious about making retro gaming sounds using Sonic Pi. A couple of months and a lot of Googling later, here's the original Mario Bros theme as it was heard on the NES console.

I'm (just about) old enough to remember rushing home from school to play this game at Philip Boucher's house, sitting cross-legged in front of the TV till my feet got pins and needles. Working out how to recreate it for Sonic Pi was a lot of fun!

Getting the sounds of the NES chip

codepreneur

App.Chart = Ember.View.extend({
  tagName: 'svg',
  reScale: function() {
    d3.selectAll( this.svg[0][0].childNodes ).remove();
    Ember.run.scheduleOnce( 'afterRender', this, 'build' );
  },
  didInsertElement: function() {
    var that = this;
    $( window ).on( 'resize', function() {
      Ember.run.debounce( that, that.reScale, 1000 );

codepreneur

echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~/local
mkdir ~/node-latest-install
cd ~/node-latest-install
curl http://nodejs.org/dist/node-latest.tar.gz | tar xz --strip-components=1
./configure --prefix=~/local
make install # ok, fine, this step probably takes more than 30 seconds...
curl https://www.npmjs.org/install.sh | sh

codepreneur

(function () {
  var makeCallback = function(eventType, observer) {
    if (eventType === 'value') {
      return function(snap) {
        observer.onNext(snap);
      };
    } else {
      return function(snap, prevName) {
        // Wrap into an object, since we can only pass one argument through.
        observer.onNext({snapshot: snap, prevName: prevName});

codepreneur

// iMacros Bootstrap - Write your macros with JavaScript.
// Be careful, you need to rename and set the extension of your macro to ".js".


// 1. Variables Initialization.


var variable1, variable2, variable3;

macro = "";

codepreneur

// iMacro CheatSheet - Command Reference
// http://wiki.imacros.net/Command_Reference


// iMacros supports 3 types of variables:
// * The macro variables !VAR0 thru !VAR9. They can be used with the SET and ADD command inside a macro.
// * Built-in variables. They contain certain values set by iMacros.
// * User-defined variables. They are defined in-macro using the SET command.
 
 

codepreneur

Tinder API documentation

http://rsty.org/

I've sniffed most of the Tinder API to see how it works. You can use this to create bots (etc) very trivially. Some example python bot code is here -> https://gist.github.com/rtt/5a2e0cfa638c938cca59 (horribly quick and dirty, you've been warned!)

Note: this was written in April/May 2014 and the API may have changed since

API Details

codepreneur

// PhantomJS Cheatsheet

$ brew update && brew install phantomjs  // install PhantomJS with brew

phantom.exit();

var page = require('webpage').create();

page.open('http://example.com', function() {});
page.evaluate(function() { return document.title; });

codepreneur

// TL;DR - Lambda means "function used as data".
// Anonymous function means "function without a name".

// This is one of the relatively few cases where the Wikipedia definition of
// a word, while not entirely wrong, is misleading. Lambdas and anonymous
// functions are distinct ideas.

// These ideas are commonly confused because in many programming languages
// all lambdas are anonymous or vise verse.