peterc

• You MUST NOT try and generate a Rails app from scratch on your own by generating each file. For a NEW app you MUST use rails new first to generate all of the boilerplate files necessary.
• Create an app in the current directory with rails new .
• Use Tailwind CSS for styling. Use --css tailwind as an option on the rails new call to do this automatically.
• Use Ruby 3.2+ and Rails 8.0+ practices.
• Use the default Minitest approach for testing, do not use RSpec.
• Default to using SQLite in development. rails new will do this automatically but take care if you write any custom SQL that it is SQLite compatible.
• An app can be built with a devcontainer such as rails new myapp --devcontainer but only do this if requested directly.
• Rails apps have a lot of directories to consider, such as app, config, db, etc.
• Adhere to MVC conventions: singular model names (e.g., Product) map to plural tables (products); controllers are plural.
• Guard against incapable browsers accessing controllers with `allo

richhickey

;;=============== play with flow ==============
(require '[clojure.core.async :as async]
         '[clojure.core.async.flow :as flow]
         '[clojure.pprint :as pp]
         '[clojure.datafy :as d]
         '[clojure.walk :as w])

(set! *warn-on-reflection* true)

(defn monitoring [{:keys [report-chan error-chan]}]

borkdude

#!/usr/bin/env bash
set -eo pipefail

CERT_FILE="./certs/dev/dev-ca/rootCA.pem"
CERT_NAME="Nextjournal Development Root CA"

echo "Installing development Root CA into system store..."

if uname -a | grep -q Darwin; then
  sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain $CERT_FILE

macagua

mkdir -p ~/.conda/pkgs && printf 'pkgs_dirs:\n   - ~/.conda/pkgs\n' >> ~/.condarc

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

jaymcgavren

# Instead of loading all of Rails, load the
# particular Rails dependencies we need
require 'sqlite3'
require 'active_record'

# Set up a database that resides in RAM
ActiveRecord::Base.establish_connection(
  adapter: 'sqlite3',
  database: ':memory:'
)

craigvantonder

#!/bin/bash

# NB: First install nscd with sudo apt-get install nscd

# run this command to flush dns cache:
sudo /etc/init.d/dns-clean restart
# or use:
sudo /etc/init.d/networking force-reload
# Flush nscd dns cache:
sudo /etc/init.d/nscd restart

patrickmmartin

Ubuntu 16 default python is almost python 3

Loads of solutions exist, but for changing the system default, alias is not the way to go.

$ update-alternatives --list python update-alternatives: error: no alternatives for python

internaut

"""
Shows how to do a cross join (i.e. cartesian product) between two pandas DataFrames using an example on
calculating the distances between origin and destination cities.

Tested with pandas 0.17.1 and 0.18 on Python 3.4 and Python 3.5

Best run this with Spyder (see https://github.com/spyder-ide/spyder)
Author: Markus Konrad <post@mkonrad.net>

April 2016

littlemove

;; Code folding
(add-hook 'ruby-mode-hook
          (lambda () (hs-minor-mode)))

(eval-after-load "hideshow"
  '(add-to-list 'hs-special-modes-alist
                `(ruby-mode
                  ,(rx (or "def" "class" "module" "do" "{" "[")) ; Block start
                  ,(rx (or "}" "]" "end"))                       ; Block end
                  ,(rx (or "#" "=begin"))                        ; Comment start