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@blenderous
blenderous / prettify-base64.js
Last active October 19, 2022 08:09
Convert PNG image to data URI using Node.js
var fs = require('fs');
//
// reference for accessing file system using node.js
// http://www.sitepoint.com/accessing-the-file-system-in-node-js/
fs.readFile('image.png', 'binary', function(error, data) {
var buf = new Buffer(data, 'binary');
var string = buf.toString('base64');
var limit = parseInt(string.length/50);
console.log('Data url of the image.png in not more than 50 characters per line:');
console.log('');
@tobiashm
tobiashm / jquery-ajax-promise.js
Last active October 23, 2018 12:03
Wrap jQuery AJAX in ES6 Promise
function AjaxError(jqXHR, textStatus, errorThrown) {
this.name = "AjaxError";
this.message = textStatus;
this.jqXHR = jqXHR;
this.errorThrown = errorThrown;
}
AjaxError.prototype = new Error();
AjaxError.prototype.constructor = AjaxError;
(function($) {
@earlonrails
earlonrails / merged_branches.sh
Last active November 22, 2021 21:11
delete merged branches in git, if you want to.
merged_branches(){
local current_branch=$(git rev-parse --abbrev-ref HEAD)
for branch in $(git branch --merged | cut -c3-)
do
echo "Branch $branch is already merged into $current_branch."
echo "Would you like to delete it? [Y]es/[N]o "
read REPLY
if [[ $REPLY =~ ^[Yy] ]]; then
git branch -d $branch
fi
@clayton
clayton / ffmpeg-install.sh
Created August 9, 2013 18:55
Install FFMPEG on OS X with HomeBrew to convert Mp4 to WebM
# Installation
brew install ffmpeg --with-vpx --with-vorbis --with-libvorbis --with-vpx --with-vorbis --with-theora --with-libogg --with-libvorbis --with-gpl --with-version3 --with-nonfree --with-postproc --with-libaacplus --with-libass --with-libcelt --with-libfaac --with-libfdk-aac --with-libfreetype --with-libmp3lame --with-libopencore-amrnb --with-libopencore-amrwb --with-libopenjpeg --with-openssl --with-libopus --with-libschroedinger --with-libspeex --with-libtheora --with-libvo-aacenc --with-libvorbis --with-libvpx --with-libx264 --with-libxvid
# Easy Peasy
ffmpeg -i video.mp4 video.webm
@moklett
moklett / openconnect.md
Created July 24, 2012 15:21
OpenConnect VPN on Mac OS X

Unfortunately, the Cisco AnyConnect client for Mac conflicts with Pow. And by "conflicts", I mean it causes a grey-screen-of-death kernel panic anytime you connect to the VPN and Pow is installed.

As an alternative, there is OpenConnect, a command-line client for Cisco's AnyConnect SSL VPN.

Here's how to get it set up on Mac OS X:

  1. OpenConnect can be installed via homebrew:

     brew update
    

brew install openconnect

@crtr0
crtr0 / client.js
Created June 8, 2012 17:02
A simple example of setting-up dynamic "rooms" for socket.io clients to join
// set-up a connection between the client and the server
var socket = io.connect();
// let's assume that the client page, once rendered, knows what room it wants to join
var room = "abc123";
socket.on('connect', function() {
// Connected, let's sign-up for to receive messages for this room
socket.emit('room', room);
});
@jboner
jboner / latency.txt
Last active June 8, 2024 07:35
Latency Numbers Every Programmer Should Know
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
@penguinboy
penguinboy / Object Flatten
Created January 2, 2011 01:55
Flatten javascript objects into a single-depth object
var flattenObject = function(ob) {
var toReturn = {};
for (var i in ob) {
if (!ob.hasOwnProperty(i)) continue;
if ((typeof ob[i]) == 'object') {
var flatObject = flattenObject(ob[i]);
for (var x in flatObject) {
if (!flatObject.hasOwnProperty(x)) continue;
@lucky
lucky / .vimrc
Created December 14, 2010 21:18
Make vim indent 2 spaces for ruby and scala files only
" Make vim indent 2 spaces for ruby and scala files only
filetype plugin indent on
set sw=4
set ts=4
:autocmd Filetype ruby set softtabstop=2
:autocmd Filetype ruby set sw=2
:autocmd Filetype ruby set ts=2
:autocmd Filetype scala set softtabstop=2
:autocmd Filetype scala set sw=2