zhengjia

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

cdmwebs

Friendly URLs

By default, Rails applications build URLs based on the primary key -- the id column from the database. Imagine we have a Person model and associated controller. We have a person record for Bob Martin that has id number 6. The URL for his show page would be:

/people/6

But, for aesthetic or SEO purposes, we want Bob's name in the URL. The last segment, the 6 here, is called the "slug". Let's look at a few ways to implement better slugs.

grosser

Using rails_admin without devise

Add RailsAdmin to your Gemfile

do NOT add devise

gem "rails_admin", :git => "git://github.com/sferik/rails_admin.git"

Bundle

pachacamac

require 'rest_client'
require 'json'
a = `sox -d --norm -t .flac - silence -l 1 0 1% 1 6.0 1% rate 16k`
#a = `arecord -q -d 3 -c 1 -f S16_LE -r 22050 -t wav | flac - -f --totally-silent -o-`
r = RestClient.post 'https://www.google.com/speech-api/v1/recognize?lang=en-US', a,
                    :content_type => 'audio/x-flac; rate=16000'
if j = JSON.parse(r)
  (p j; `espeak 'you said: #{j['hypotheses'].first['utterance']}'`)
end

flavio

#!/usr/bin/env ruby

require 'rubygems'
require 'bundler'
require 'fileutils'
require 'net/http'
require 'net/https'
require 'uri'

TMP_DIR = "/tmp/gems"

ProfAvery

#!/usr/bin/env ruby

require 'test/unit'

class TestSums < Test::Unit::TestCase

  def setup
    @a = [2, 5, 18, 27]
    @sum = 0
  end

pbroschwitz

/**
* supplant() does variable substitution on the string. It scans through the string looking for 
* expressions enclosed in { } braces. If an expression is found, use it as a key on the object, 
* and if the key has a string value or number value, it is substituted for the bracket expression 
* and it repeats.
*
* Written by Douglas Crockford
* http://www.crockford.com/
*/
String.prototype.supplant = function (o) {

dergachev

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:

nathancolgate

# config/initializers/mime_types.rb
Mime::Type.register "application/vnd.ms-excel", :xls

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000