jonleighton

// Converts an ArrayBuffer directly to base64, without any intermediate 'convert to string then
// use window.btoa' step. According to my tests, this appears to be a faster approach:
// http://jsperf.com/encoding-xhr-image-data/5

/*
MIT LICENSE

Copyright 2011 Jon Leighton

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 furnished to do so, subject to the following conditions:

ericchaves

var reg = /^[a-z]$/;

console.log('case 01: typeof /^[a-z]$/ returns %s', typeof reg);
console.log('case 02: /^[a-z]$/ instanceof RegExp returns %s', reg instanceof RegExp);
console.log('case 03: /^[a-z]$/.constructor.name === "RegExp" returns %s', reg.constructor.name === 'RegExp'); 

var util = require('util'),
    vm = require('vm'),
    sandbox = { u: reg };

mshafrir

{
    "AL": "Alabama",
    "AK": "Alaska",
    "AS": "American Samoa",
    "AZ": "Arizona",
    "AR": "Arkansas",
    "CA": "California",
    "CO": "Colorado",
    "CT": "Connecticut",
    "DE": "Delaware",

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

iwanbk

for line in yourString:gmatch("([^\n]*)\n?") do
  -- do something
end

todgru

Setup redis-cli on AWS EC2

SSH into your EC2 instance. Run the following:

$ sudo yum install gcc This may return an "already installed" message. That's OK.

$ wget http://download.redis.io/redis-stable.tar.gz && tar xvzf redis-stable.tar.gz && cd redis-stable && make

See: http://docs.aws.amazon.com/AmazonElastiCache/latest/UserGuide/GettingStarted.ConnectToCacheNode.Redis.html

glen-cheney

Encoding Video

Installing

Install FFmpeg with homebrew. You'll need to install it with a couple flags for webm and the AAC audio codec.

brew install ffmpeg --with-libvpx --with-libvorbis --with-fdk-aac --with-opus

henriquemenezes

-- Get Max ID from table
SELECT MAX(id) FROM table;

-- Get Next ID from table
SELECT nextval('table_id_seq');

-- Set Next ID Value to MAX ID
SELECT setval('table_id_seq', (SELECT MAX(id) FROM table));

zenorocha

1. Get your IP Address

echo `ifconfig $(netstat -nr | grep -e default -e "^0\.0\.0\.0" | head -1 | awk '{print $NF}') | grep -e "inet " | sed -e 's/.*inet //' -e 's/ .*//' -e 's/.*\://'`

2. Modify your hosts file

thebugcatcher

# Given an input, this program returns a list of all primes numbers less than the input. 

defmodule NPrimes do
  def get_primes(n) when n < 2, do: []
  def get_primes(n), do: Enum.filter(2..n, &is_prime?(&1))

  defp is_prime?(n) when n in [2, 3], do: true
  defp is_prime?(x) do
    start_lim = div(x, 2)
    Enum.reduce(2..start_lim, {true, start_lim}, fn(fac, {is_prime, upper_limit}) ->