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

noprompt

(ns foo.core
  (:refer-clojure :exclude [slurp]))

(defmacro slurp [file]
  (clojure.core/slurp file))

;; In CLJS

(ns bar.core
  (:require [foo.core :include-macros true :refer [slurp]]))

DeLaGuardo

import time
from functools import wraps


def retry(ExceptionToCheck, tries=4, delay=3, backoff=2, logger=None):
    def deco_retry(f):

        @wraps(f)
        def f_retry(*args, **kwargs):
            mtries, mdelay = tries, delay

joelittlejohn

#!/bin/bash
for f in $(egrep -o -R "defn?-? [^ ]*" * --include '*.clj' | cut -d \  -f 2 | sort | uniq); do
    echo $f $(grep -R --include '*.clj' -- "$f" * | wc -l);
done | grep " 1$"

sandfox

#Compiling Nginx with RTMP module

1. Install the following packages sudo apt-get install python-software-properties dpkg-dev git
2. Add Nginx repo sudo add-apt-repository ppa:nginx/stable
3. Update package list sudo apt-get update
4. Get nginx source (put this in it's own dir like /build sudo apt-get source nginx-full

vorburger

	/**
	 * Returns a free port number on localhost.
	 * 
	 * Heavily inspired from org.eclipse.jdt.launching.SocketUtil (to avoid a dependency to JDT just because of this).
	 * Slightly improved with close() missing in JDT. And throws exception instead of returning -1.
	 * 
	 * @return a free port number on localhost
	 * @throws IllegalStateException if unable to find a free port
	 */
	private static int findFreePort() {