flyingmachine

(defdb db 
  (if (System/getenv "DATABASE_URL")
    (let [db-uri (java.net.URI. (System/getenv "DATABASE_URL"))
          user-and-password (clojure.string/split (.getUserInfo db-uri) #":")]
      {:classname "org.postgresql.Driver"
       :subprotocol "postgresql"
       :user (get user-and-password 0)
       :password (get user-and-password 1) ; may be nil
       :subname (if (= -1 (.getPort db-uri))
                  (format "//%s%s" (.getHost db-uri) (.getPath db-uri))

hiredman

(defn handle-file-select [evt]
  (.stopPropagation evt)
  (.preventDefault evt)
  (let [files (.-files (.-dataTransfer evt))]
    (dotimes [i (.-length files)]
      (let [rdr (js/FileReader.)
            the-file (aget files i)]
        (set! (.-onload rdr)
              (fn [e]
                (let [file-content (.-result (.-target e))

ftrain

;; This is at: https://gist.github.com/8655399

;; So we want a rhyming dictionary in Clojure. Jack Rusher put up
;; this code here:
;; 
;; https://gist.github.com/jackrusher/8640437
;;
;; I'm going to study this code and learn as I go.
;;
;; First I put it in a namespace.

jsomers

How to make the Webster's 1913 your default Kindle dictionary

1. Download a Kindle-compatible version of the dictionary here. Unzip the .rar archive.

2. Get the "Send to Kindle" program on your computer. Here's the link for the Mac.

3. Right-click your recently downloaded (unzipped) dictionary file, and click the "Send to Kindle" menu item. It will arrive on your Kindle shortly.

4. Once the dictionary has arrived, go to your settings -- on my newish paperwhite, it's at Home > Settings > Device Options > Language and Dictionaries > Dictionaries > English. Choose the Webster's 1913.

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

aphyr

Thank you for extending an invitation to speak at HighLoad++. I
sincerely appreciate your consideration.

I am an outspoken advocate for LGBTQ equality; this position is deeply
woven into my work. Clojure From The Ground Up is adamantly
LGBT-inclusive. Jepsen is named after a gay pop anthem and includes
dozens of references to same-sex relationships and trans identities. My
talk slides are populated with bearded nuns, genderqueer punks, and
trans hackers. My twitter feed is about as gay as it is possible to get.

reborg

Rich Already Answered That!

A list of commonly asked questions, design decisions, reasons why Clojure is the way it is as they were answered directly by Rich (even when from many years ago, those answers are pretty much valid today!). Feel free to point friends and colleagues here next time they ask (again). Answers are pasted verbatim (I've made small adjustments for readibility, but never changed a sentence) from mailing lists, articles, chats.

How to use:

• The link in the table of content jumps at the copy of the answer on this page.
• The link on the answer itself points back at the original post.

Table of Content

bhb

Friendly

A beginner-friendly REPL that combines

• rebel-readline
• Expound
• Speculative

Usage

jackrusher

;; make sure you've set your default project with:
;; gcloud config set project <project-name>

(require 'tramp)
(add-to-list 'tramp-methods
  '("gcssh"
    (tramp-login-program        "gcloud compute ssh")
    (tramp-login-args           (("%h")))
    (tramp-async-args           (("-q")))
    (tramp-remote-shell         "/bin/sh")