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@wmertens
wmertens / q-promise-cache.coffee
Created June 21, 2013 10:30
Using cached promises for better resource use
# We have a function that loads some resource. It might get called multiple times by our application, for example a web server.
# We use a stored promise to serve as both a cache and a hook for multiple callers to get the same result
# JavaScript version at the bottom
Q = require 'q'
loadPromise = null
doLoad = ->
if not loadPromise
# get a fresh result
loadPromise = Q.delay(1000).then -> Date.now()
# after 1 second clear cache
@barneycarroll
barneycarroll / Location.es6.min.js
Last active August 24, 2018 09:36
An ultra-small URI parsing function that accepts a URI-like string & returns an object with all the string properties of the native Location object for that string. Works using native property detection, without received wisdom (ie dictionaries, inference, etc).
export default x=>document.createElement('a').href=x
@quiver
quiver / README.md
Last active September 19, 2024 12:21
Who says PostgreSQL can't Pub/Sub like Redis?

Pub/Sub pattern with PostgreSQL's LISTEN/NOTIFY command

This is a simple chat-like program using pub-sub pattern, backed by PostgreSQL's LISTEN/NOTIFY command.

Publish

publish message to foo channel from user nickname.

$ python pub.py foo nickname
PUBLISH to channel #foo
@tracend
tracend / aws_ec2_root.md
Created November 5, 2012 12:02
AWS EC2: Steps to enable root access with your local key - Inspired by: https://forums.aws.amazon.com/thread.jspa?threadID=86876

Note: replace {{server}} with your domain or ip

  • Login as the ec2-user
ssh -i key.pem ec2-user@{{server}}
  • Switch to administrator
sudo -i
@tiagoa
tiagoa / Backbone.websocket.js
Created October 13, 2012 23:34
Overwrite Backbone.sync method to persist model via WebSocket
// Inspired by https://github.com/logicalparadox/backbone.iobind/blob/master/lib/sync.js
// Overwrite Backbone.sync method
Backbone.sync = function(method, model, options){
// create a connection to the server
var ws = new WebSocket('ws://127.0.0.1:1234');
// send the command in url only if the connection is opened
// command attribute is used in server-side.
ws.onopen = function(){
@aspyct
aspyct / signal.c
Last active February 19, 2024 11:24
Unix signal handling example in C, SIGINT, SIGALRM, SIGHUP...
/**
* More info?
* [email protected]
* http://aspyct.org
*
* Hope it helps :)
*/
#include <stdio.h>
#include <stdlib.h>
@davidwkeith
davidwkeith / index.html
Last active November 7, 2024 19:03
NOTE: This was a great hack in days gone by, but now both Apple and Google have improved their support for custom protocol handlers. Licensed under the WFTPL http://www.wtfpl.net/txt/copying/
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>App Redirection</title>
</head>
<body>
<!--
NOTE: This was a great hack in days gone by, but now both Apple and Google have improved their support for custom
protocol handlers.
@sakamies
sakamies / dabblet.css
Created March 28, 2012 10:37
Pixel Perfect CSS Rotation
/* Pixel Perfect CSS Rotation */
body {
text-align: center;
}
.clock {
display: inline-block;
background: black;
border-radius: 100%;
width: 101px;
height: 101px;
@TooTallNate
TooTallNate / repl-client.js
Created March 26, 2012 20:09
Running a "full-featured" REPL using a net.Server and net.Socket
var net = require('net')
var sock = net.connect(1337)
process.stdin.pipe(sock)
sock.pipe(process.stdout)
sock.on('connect', function () {
process.stdin.resume();
process.stdin.setRawMode(true)
@robnyman
robnyman / image-data-url-localStorage.js
Created February 21, 2012 08:29
Turn image into Data URL and save in localStorage
// Get a reference to the image element
var elephant = document.getElementById("elephant");
// Take action when the image has loaded
elephant.addEventListener("load", function () {
var imgCanvas = document.createElement("canvas"),
imgContext = imgCanvas.getContext("2d");
// Make sure canvas is as big as the picture
imgCanvas.width = elephant.width;