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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

uris77

(defun helm-headlines (headline buffer-name good-regex exception-regex)
  "Display headlines for the current file.

   Displays lines where good-regex matches, except for those
   which also match exception-regex."
  ;; Fixes bug where the current buffer sometimes isn't used
  (setq helm-current-buffer (current-buffer))
  
  ;; https://groups.google.com/forum/#!topic/emacs-helm/YwqsyRRHjY4
  (jit-lock-fontify-now)

uris77

(ns foo.auth.google
  (:require [clojure.string :as str]
            [clojure.java.io :as io]
            [clojure.data.json :as json]
            [clojure.logging :refer :all]
            [friend-oauth2.util :refer [format-config-uri]]
            [friend-oauth2.workflow :as oauth2])
  (:import [java.security.cert CertificateFactory]
           [org.apache.commons.codec.binary Base64]))