Skip to content

Instantly share code, notes, and snippets.

View mjgil's full-sized avatar

Malcom Gilbert mjgil

30 followers · 0 following
View GitHub Profile
@entaroadun
entaroadun / visualization_in_js.md
Created December 23, 2011 21:35
Visualization using Javascript on Github

Data visualization in one of three most important steps in data mining (https://github.com/entaroadun/hnpickup#readme). Often times, it's impossible to understand data without proper visualization. I went looking for great tools to do that.

Two website list recent JS visualization frameworks:

Most of them are available on Github. My three favorite:

@hellerbarde
hellerbarde / latency.markdown
Created May 31, 2012 13:16 — forked from jboner/latency.txt
Latency numbers every programmer should know

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

@michaelcox
michaelcox / SpecRunner.js
Last active January 11, 2024 06:05
Browser Unit Testing with Backbone Mocha Chai and RequireJS
require.config({
baseUrl: '/backbone-tests/',
paths: {
'jquery' : '/app/libs/jquery',
'underscore' : '/app/libs/underscore',
'backbone' : '/app/libs/backbone',
'mocha' : 'libs/mocha',
'chai' : 'libs/chai',
'chai-jquery' : 'libs/chai-jquery',
'models' : '/app/models'
@rgrove
rgrove / getAbsoluteBoundingRect.js
Created April 25, 2013 21:20
Simple JS function that returns a bounding rect for an element with absolute coordinates corrected for scroll positions.
/**
Returns a bounding rect for _el_ with absolute coordinates corrected for
scroll positions.
The native `getBoundingClientRect()` returns coordinates for an element's
visual position relative to the top left of the viewport, so if the element
is part of a scrollable region that has been scrolled, its coordinates will
be different than if the region hadn't been scrolled.
This method corrects for scroll offsets all the way up the node tree, so the
@willurd
willurd / web-servers.md
Last active July 12, 2024 11:21
Big list of http static server one-liners

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000
@rakhmad
rakhmad / backend-architecures.md
Created June 23, 2013 15:32 — forked from ragingwind/Backend Architectures Keywords and References.md

Backend Architectures

ARCHITECTURES

Twitter

ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats

@raelgc
raelgc / Email Server (Linux, Unix, Mac).md
Last active July 4, 2024 19:43
Setup a Local Only SMTP Email Server (Linux, Unix, Mac)

Setup a Local Only SMTP Email Server (Linux, Unix, Mac)

1 - Point localhost.com to your machine

Most of programs will not accept an email using just @localhost as domain. So, edit /etc/hosts file to make the domain localhost.com point to your machine, including this content to the file:

127.0.0.1 localhost.com

2 - Install Postfix

@rossant
rossant / raytracing.py
Last active June 25, 2024 20:58
Very simple ray tracing engine in (almost) pure Python. Depends on NumPy and Matplotlib. Diffuse and specular lighting, simple shadows, reflections, no refraction. Purely sequential algorithm, slow execution.
"""
MIT License
Copyright (c) 2017 Cyrille Rossant
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
@jedi4ever
jedi4ever / nodejs-cluster-zero-downtime.md
Last active June 29, 2024 16:00
nodejs clustering, zero downtime deployment solutions

Clustering: The basics

The trick? pass the file descriptor from a parent process and have the server.listen reuse that descriptor. So multiprocess in their own memory space (but with ENV shared usually)

It does not balance, it leaves it to the kernel.

In the last nodejs > 0.8 there is a cluster module (functional although marked experimental)

@mef
mef / pre-render.js
Last active May 20, 2022 16:56
proof-of-concept pre-rendering d3.js svgs on the server using node.js and jsdom module.
// pre-render d3 charts at server side
var d3 = require('d3')
, jsdom = require('jsdom')
, fs = require('fs')
, htmlStub = '<html><head></head><body><div id="dataviz-container"></div><script src="js/d3.v3.min.js"></script></body></html>'
jsdom.env({
features : { QuerySelector : true }
, html : htmlStub
, done : function(errors, window) {