jedireza

Let’s Encrypt + Heroku

Step 1: Setup certificate

$ sudo letsencrypt certonly --manual -d <domain>

You'll need to deploy a verification file to your current website.

julienma

Sinatra & Web Development Cheat Sheet

This is a cheat sheet I developed for students while teaching an Intro to Web Development course through Lighthouse Labs. If you're interested in learning to code, you should definitely check them out.

Table of Contents

1. HTML
   • Basic page structure
   • Formatting tags

• Content tags

d2s

Fix Ubuntu package cache

Had problem with Ubuntu package cache.

➜  sources.list.d sudo apt-get update                   
Hit:1 http://fi.archive.ubuntu.com/ubuntu xenial InRelease
Hit:2 http://fi.archive.ubuntu.com/ubuntu xenial-updates InRelease                                                                   
Hit:3 http://fi.archive.ubuntu.com/ubuntu xenial-backports InRelease                                                                 
Hit:4 http://security.ubuntu.com/ubuntu xenial-security InRelease

lukencode

(function () {

    var scriptName = "embed.js"; //name of this script, used to get reference to own tag
    var jQuery; //noconflict reference to jquery
    var jqueryPath = "http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"; 
    var jqueryVersion = "1.8.3";
    var scriptTag; //reference to the html script tag

    /******** Get reference to self (scriptTag) *********/
    var allScripts = document.getElementsByTagName('script');

dhh

class Ticket < ActiveRecord::Base
  belongs_to :grouper
  belongs_to :user

  validate :user_cant_be_blacklisted, on: :confirmation
  validate :user_cant_double_book, on: :confirmation

  validate :grouper_cant_be_full, on: :confirmation
  validate :grouper_cant_have_occurred, on: :confirmation

dhh

ruby '2.7.1'

gem 'rails', github: 'rails/rails'
gem 'tzinfo-data', '>= 1.2016.7'  # Don't rely on OSX/Linux timezone data

# Action Text
gem 'actiontext', github: 'basecamp/actiontext', ref: 'okra'
gem 'okra', github: 'basecamp/okra'

# Drivers

zakariaf

Rails 7 new features. Before and After

• Add ComparisonValidator
• PostgreSQL generated columns
• PostgreSQL custom enum types
• Add tracking of belongs_to association
• association_previously_changed? method
• Add invert_where method
• Add associated method
• Add missing method
• Active Record Encryption

julienma

-- Script for DEVONthink 3
-- Run OCRmyPDF on PDFs without OCR
-- Requires https://github.com/jbarlow83/OCRmyPDF to be installed e.g. with brew

on performSmartRule(theRecords)
	tell application id "DNtp"
		set strExportPath to "PATH=/opt/homebrew/bin:$PATH "
		set intRecordsCount to count of theRecords
		show progress indicator "Adding OCR to PDF..." steps intRecordsCount
		repeat with theRecord in theRecords

systemed

(Dijkstra and plain A* are generally not included here as there are thousands of 
implementations, though I've made an exception for rare Ruby and Crystal versions,
and for Thor, Mapzen's enhanced A*. )

A*                                      Ruby    https://github.com/georgian-se/shortest-path
A*                                      Crystal https://github.com/petoem/a-star.cr
A* (bidirectional with shortcuts)       C++     https://github.com/valhalla/valhalla
NBA*                                    JS      https://github.com/anvaka/ngraph.path
NBA*                                    Java    https://github.com/coderodde/GraphSearchPal
NBA*                                    Java    https://github.com/coderodde/FunkyPathfinding

jfarmer

true and false vs. "truthy" and "falsey" (or "falsy") in Ruby, Python, and JavaScript

Many programming languages, including Ruby, have native boolean (true and false) data types. In Ruby they're called true and false. In Python, for example, they're written as True and False. But oftentimes we want to use a non-boolean value (integers, strings, arrays, etc.) in a boolean context (if statement, &&, ||, etc.).

This outlines how this works in Ruby, with some basic examples from Python and JavaScript, too. The idea is much more general than any of these specific languages, though. It's really a question of how the people designing a programming language wants booleans and conditionals to work.

If you want to use or share this material, please see the license file, below.

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