andykirk

/**
 * truncate_html()
 *
 * Truncates a HTML string to a given length of _visisble_ (content) characters.
 * E.g. 
 * "This is some <b>bold</b> text" has a visible/content length of 22 characters, 
 * though the total string length is 29 characters.
 * This function allows you to limit the visible/content length whilst preserving any HTML formatting.
 *
 * @param string $html

shurup14

{
	"text/vnd.wap.wmlscript": "Wireless Markup Language Script (WMLScript)",
	"application/cu-seeme": "CU-SeeMe",
	"application/vnd.mobius.plc": "Mobius Management Systems - Policy Definition Language File",
	"application/vnd.dna": "New Moon Liftoff/DNA",
	"application/mathml+xml": "Mathematical Markup Language",
	"image/x-cmx": "Corel Metafile Exchange (CMX)",
	"application/vnd.oasis.opendocument.text": "OpenDocument Text",
	"application/vnd.ezpix-album": "EZPix Secure Photo Album",
	"application/xslt+xml": "XML Transformations",

davidjrice

# config/initializers/redcarpet.rb
module ActionView
  module Template::Handlers
    class Markdown
      class_attribute :default_format
      self.default_format = Mime::HTML

      def call(template)
        markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML, :autolink => true, :space_after_headers => true)
        markdown.render(template.source).html_safe.inspect

botimer

# This is a reasonably well-behaved helper for command-line scripts needing to ask a simple yes/no question.
# It optionally accepts a prompt and a default answer that will be returned on enter keypress.
# It keeps asking and echoes the answer on the same line until it gets y/n/Y/N or enter.
# I tried to get Highline to behave like this directly, but even though it's sophisticated, I didn't like the result.
# This isn't especially elegant, but it is straightforward and gets the job done.

require 'highline/import'
def yesno(prompt = 'Continue?', default = true)
  a = ''
  s = default ? '[Y/n]' : '[y/N]'

vajradog

##Set auto expiration for rails models.

This is a simple view logic that moves objects based on a predetermined date.

Let's say we have a bunch of events(or posts) on our index page and we want to sort out which of these are still active and which are not (based on the time).

We want the active ones to be clickable and prominent, we want the non-active ones to be greyed-out or even hidden. So how do we do this?

Rails provide a simple yet powerful method: future?()

equivalent

#!/usr/bin/env ruby
require "openssl"
require 'digest/sha2'
require 'base64'

# We use the AES 256 bit cipher-block chaining symetric encryption
alg = "AES-256-CBC"

# We want a 256 bit key symetric key based on some passphrase
digest = Digest::SHA256.new

frane

# Traversing arrays and objects in CoffeeScript

# The array and object we use for testing
arr = [1, 2, 3, 4, 5]
obj = {a: 1, b: 2, c: 3, d: 4, e: 5}


# 'in' has a different meaning in CoffeeScript than in JavaScript
# CS: element in array -> JS: array.indexOf(element) >= 0
console.log '5 in arr: ' + (5 in arr)

jcasimir

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.

leonklingele

IP="127.0.0.1"
PORT="8877"
SHARED_SECRET="shared secret"

OPENSSL="/usr/local/opt/libressl/bin/openssl"
OPENSSL_CMD="$OPENSSL enc -a -A -aes-256-gcm"

while IFS= read -r MSG; do
	echo "$MSG" | $OPENSSL_CMD -e -k "$SHARED_SECRET"
	echo

db0sch

If your master.key has been compromised, you might want to regenerate it.

No key regeneration feature at the moment. We have to do it manually.

1. Copy content of original credentials rails credentials:show somewhere temporarily.
2. Remove config/master.key and config/credentials.yml.enc
3. Run EDITOR=vim rails credentials:edit in the terminal: This command will create a new master.key and credentials.yml.enc if they do not exist.
4. Paste the original credentials you copied (step 1) in the new credentials file (and save + quit vim)
5. Add and Commit the file config/credentials.yml.enc