bkimble

#!/usr/bin/env ruby

# List all keys stored in memcache. 
# Credit to Graham King at http://www.darkcoding.net/software/memcached-list-all-keys/ for the original article on how to get the data from memcache in the first place.

require 'net/telnet'

headings = %w(id expires bytes cache_key)
rows = []

JoshuaEstes

Moved to https://github.com/JoshuaEstes/CheatSheets

gaearon

function mapValues(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    result[key] = fn(obj[key], key);
    return result;
  }, {});
}

function pick(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    if (fn(obj[key])) {

burke

ruby-1.9.3-p327 cumulative performance patch for rbenv

This installs a patched ruby 1.9.3-p327 with various performance improvements and a backported COW-friendly GC, all courtesy of funny-falcon.

Requirements

• rbenv
• ruby-build

You will also need a C Compiler. If you're on Linux, you probably already have one or know how to install one. On OS X, you should install XCode, and brew install autoconf using homebrew.

debasishg

General Background and Overview

1. Probabilistic Data Structures for Web Analytics and Data Mining : A great overview of the space of probabilistic data structures and how they are used in approximation algorithm implementation.
2. Models and Issues in Data Stream Systems
3. Philippe Flajolet’s contribution to streaming algorithms : A presentation by Jérémie Lumbroso that visits some of the hostorical perspectives and how it all began with Flajolet
4. Approximate Frequency Counts over Data Streams by Gurmeet Singh Manku & Rajeev Motwani : One of the early papers on the subject.
5. [Methods for Finding Frequent Items in Data Streams](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.187.9800&rep=rep1&t

pbostrom

Loading third-party npm modules in ClojureScript

This example shows how to load the re-resizable npm module which provides a resizable React component. Requires the lein-npm plugin.

1. Add the npm module to the :npm :dependencies section of project.clj:

 :npm {:package {:scripts {:build "webpack -p"}}
       :dependencies [[react "16.4.0"]
                      [react-dom "16.4.0"]
                      ["@cljs-oss/module-deps" "1.1.1"]

dpk

def djb2 str
  hash = 5381
  str.each_byte do |b|
    hash = (((hash << 5) + hash) + b) % (2 ** 32)
  end
  hash
end

def djb2a str

gorenje

source :rubygems

gem 'sinatra'
gem 'json'
gem 'omniauth'
gem 'omniauth-oauth2'
gem 'omniauth-github'
gem 'omniauth-facebook'
gem 'omniauth-twitter'
# gem 'omniauth-att', :path => File.expand_path("./../../omniauth-att", __FILE__)

nblumoe

fireplace

• cpr => (require ... :reload)
• cpR => (require ... :reload-all)

Evaluation

• :Eval (clojure code) => runs (clojure code) in repl
• cpp => evaluate inn-most expessions under cursor
• cp<movement> => evaluate text described by <movement>
• cqp => opens quasi-repl
• cqc => quasi-repl command line window

pepijndevos

(ns persistent-heap)

(defn swap [heap idx idy]
  (assoc heap idx (get heap idy) idy (get heap idx)))

(defn children [idx]
  (let [idx (inc (* idx 2))
        idy (inc idx)]
    [idx idy]))