Chuck J Hardy ChuckJHardy

Setting up and installing rbenv, ruby-build, rubies, rbenv-gemset, and bundler

This guide enables you to install (ruby-build) and use (rbenv) multiple versions of ruby, isolate project gems (gemsets and/or bundler), and automatically use appropriate combinations of rubies and gems.

TL;DR Demo

# Ensure system is in ship-shape.

aptitude install git zsh libssl-dev zlib1g-dev libreadline-dev libyaml-dev

vimcov

Vimcov runs a Ruby script and opens Vim marking the lines that were actually run.

This could be useful when debugging long methods with lots of branching -- instead of abusing puts, you can just use Vimcov and you're good to go.

It runs only in Ruby 1.9.x.

Future versions will include more tight integration with test runs or Rails or whatever.

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Put test1.js and test2.js into a tests/ directory, then run the suite:

$ casperjs test tests/ --pre=pre.js --includes=inc.js --post=post.js
Test file: /Users/nperriault/tmp/pre-inc/pre.js                                 
Hey, I'm executed before the suite.
Test file: /Users/nperriault/tmp/pre-inc/tests/test1.js                         
# this is test 1
Hi, I've been included.
PASS Subject is strictly true

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

clickWhileSelector()

var casper = require('casper').create();

casper.clickWhileSelector = function(selector) {
    return this.then(function() {
        if (this.exists(selector)) {
            this.echo('found link: ' + this.getElementInfo(selector).tag);
            this.click(selector);

Deploy Rails app to digitalocean with nginx, unicorn, capistrano & postgres

Create droplet of your liking (ubuntu 12.10 x32)

ssh to root in terminal with your server ip

ssh [email protected]

Add ssh fingerprint and enter password provided in email

	# Mac OS X Lion introduced a new, iOS-like context menu when you press and hold a key
	# that enables you to choose a character from a menu of options. If you are on Lion
	# try it by pressing and holding down 'e' in any app that uses the default NSTextField
	# for input.
	#
	# It's a nice feature and continues the blending of Mac OS X and iOS features. However,
	# it's a nightmare to deal with in Sublime Text if you're running Vintage (Vim) mode,
	# as it means you cannot press and hold h/j/k/l to move through your file. You have
	# to repeatedly press the keys to navigate.

	<% flash.each do \|type, message\| %>
	<div class="alert <%= bootstrap_class_for(type) %> fade in">
	<button class="close" data-dismiss="alert">×</button>
	<%= message %>
	</div>
	<% end %>

	package com.onavo.android.common.ui;

	import android.view.View;
	import android.view.ViewGroup;

	import java.util.LinkedList;
	import java.util.List;

	/**
	* Based on http://stackoverflow.com/a/8831593/37020 by by Shlomi Schwartz