borkdude

(require '[clojure.core.match :refer [match]]
         '[clojure.string :as str]
         '[hiccup2.core :refer [html]]
         '[org.httpkit.server :as server])

(defn router [req]
  (let [paths (vec (rest (str/split (:uri req) #"/")))]
    (match [(:request-method req) paths]
           [:get ["users" id]] {:body (str (html [:div id]))}
           :else {:body (str (html [:html "Welcome!"]))})))

john2x

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

Kartones

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

vsizov

# Source: http://timcardenas.com/automatically-reload-gems-in-rails-327-on-eve

# Inside config/environments/development.rb
 
 
# Do the following after every request to the server in development mode
ActionDispatch::Callbacks.to_cleanup do
 
  # If the gem's top level module is currently loaded, unload it
  if Object.const_defined?(:MyCoolGem)