ulve

MIX_ENV=prod mix compile.protocols
MIX_ENV=prod PORT=4001 elixir -pa _build/prod/consolidated -S mix phoenix.server

mdang

Ruby on Rails Cheatsheet

Architecture

Create a new application

Install the Rails gem if you haven't done so before

jnwhiteh

import java.util.Iterator;
import java.util.NoSuchElementException;

// Introduction:
//
// This is an example class meant to illustrate several differen concepts:
//   * The use of type parameters (i.e. Java generics)
//   * Implementing an iterator over some collection, in this case an array
//   * Implementing the Iterable interface, which enables your collection
//     to work with the Java simple for loops, i.e. (for String s : list)

maxivak

skip the authenticity token check for a json request

if you got this error while requesting the application via JSON request:

exception ActionController::InvalidAuthenticityToken

backtrace":"[\"/home/uadmin/.rvm/gems/ruby-2.1.7/gems/actionpack-4.2.4/lib/action_controller/metal/request_forgery_protection.rb:181:in `handle_unverified_request'\", 
\"/home/uadmin/.rvm/gems/ruby-2.1.7/gems/actionpack-4.2.4/lib/action_controller/metal/request_forgery_protection.rb:209:in `handle_unverified_request'\", 
...

jakimowicz

%Q, %q, %W, %w, %x, %r, %s, %i

Perl-inspired notation to quote strings: by using % (percent character) and specifying a delimiting character.

Any single non-alpha-numeric character can be used as the delimiter, %[including these], %?or these?, %~or even these things~.

Strings

% or %Q

rubencaro

Elixir installation guide

Version numbers should be the ones you want. Here I do it with the last ones available at the moment of writing.

The simplest way to install elixir is using your package manager. Sadly, at the time of writing only Fedora shows the intention to keep its packages up to date. There you can simply sudo dnf install erlang elixir and you are good to go.

Anyway, if you intend to work with several versions of erlang or elixir at the same time, or you are tied to a specific version, you will need to compile it yourself. Then asdf is your best friend.

gnufied

(setq enh-ruby-program "/home/gnufied/.rbenv/versions/1.9.3-p448/bin/ruby")
(autoload 'enh-ruby-mode "enh-ruby-mode" "Major mode for ruby files" t)
(add-to-list 'auto-mode-alist '("\\.rb$" . enh-ruby-mode))
(add-to-list 'auto-mode-alist '("\\.rake$" . enh-ruby-mode))
(add-to-list 'auto-mode-alist '("Rakefile$" . enh-ruby-mode))
(add-to-list 'auto-mode-alist '("\\.gemspec$" . enh-ruby-mode))
(add-to-list 'auto-mode-alist '("\\.ru$" . enh-ruby-mode))
(add-to-list 'auto-mode-alist '("Gemfile$" . enh-ruby-mode))

(add-to-list 'interpreter-mode-alist '("ruby" . enh-ruby-mode))

gnufied

(source "melpa" "http://melpa.milkbox.net/packages/")
(source "gnu" "http://elpa.gnu.org/packages/")
(source "marmalade" "http://marmalade-repo.org/packages/")

(depends-on "ac-js2")
(depends-on "adaptive-wrap")
(depends-on "ag")
(depends-on "auto-complete")
(depends-on "calfw")
(depends-on "cask")

schickling

require "active_record"

namespace :db do

  db_config       = YAML::load(File.open('config/database.yml'))
  db_config_admin = db_config.merge({'database' => 'postgres', 'schema_search_path' => 'public'})

  desc "Create the database"
  task :create do
    ActiveRecord::Base.establish_connection(db_config_admin)

dodyg

#Intro

Kotlin is a new programming language for the JVM. It produces Java bytecode, supports Android and generates JavaScript. The latest version of the language is Kotlin M5.3

Kotlin project website is at kotlin.jetbrains.org.

All the codes here can be copied and run on Kotlin online editor.

Let's get started.