alienscience

(ns shell
  "Run OS commands"
  (:import [java.io BufferedReader InputStreamReader]))

(defn run
  "Executes the given command"
  [cmd]
  (.. Runtime getRuntime (exec (str cmd))))

(defn pipe-to

viksit

'xxyxxyxyx'.replace(/[xy]/g, function(c) {
    var r = Math.random()*16|0, v = c == 'x' ? r : (r&0x3|0x8);
    return v.toString(16);
});

paulkoerbitz

(ns tutorial.scrape1
  (:require [net.cgrand.enlive-html :as html]))

(def *url* "http://www.belex.rs/trgovanje/prospekt/VZAS/show")
 
(defn get-page 
  "Gets the html page from passed url" 
  [url] 
  (html/html-resource (java.net.URL. url))) 
 

methane

from time import sleep
from tornado.httpserver import HTTPServer
from tornado.ioloop import IOLoop
from tornado.web import Application, asynchronous, RequestHandler
from multiprocessing.pool import ThreadPool

_workers = ThreadPool(10)

def run_background(func, callback, args=(), kwds={}):
    def _callback(result):

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

jgeurts

####################################
# BASIC REQUIREMENTS
# http://graphite.wikidot.com/installation
# http://geek.michaelgrace.org/2011/09/how-to-install-graphite-on-ubuntu/
# Last tested & updated 10/13/2011
####################################

cd
sudo apt-get update
sudo apt-get upgrade

smougenot

  # stacktrace java as one message
  multiline {
    #type => "all" # no type means for all inputs
    pattern => "(^.+Exception: .+)|(^\s+at .+)|(^\s+... \d+ more)|(^\s*Caused by:.+)"
    what => "previous"
  }

brandonb927

#!/bin/sh

###
# SOME COMMANDS WILL NOT WORK ON macOS (Sierra or newer)
# For Sierra or newer, see https://github.com/mathiasbynens/dotfiles/blob/master/.macos
###

# Alot of these configs have been taken from the various places
# on the web, most from here
# https://github.com/mathiasbynens/dotfiles/blob/5b3c8418ed42d93af2e647dc9d122f25cc034871/.osx

samuelclay

(ns radix
  (:require [clojure.string :as string]))
(use 'clojure.java.io)
(use 'clojure.pprint)

(println "Loading names... ")
(time (def names
    (with-open 
      [rdr (reader 
            "/usr/share/dict/ProperNames")]

crowdmatt

Setting up Flume NG, listening to syslog over UDP, with an S3 Sink

My goal was to set up Flume on my web instances, and write all events into s3, so I could easily use other tools like Amazon Elastic Map Reduce, and Amazon Red Shift.

I didn't want to have to deal with log rotation myself, so I setup Flume to read from a syslog UDP source. In this case, Flume NG acts as a syslog server, so as long as Flume is running, my web application can simply write to it in syslog format on the specified port. Most languages have plugins for this.

At the time of this writing, I've been able to get Flume NG up and running on 3 ec2 instances, and all writing to the same bucket.

Install Flume NG on instances