alvinlai

#!/bin/sh
OSX_VERS=$(sw_vers -productVersion | awk -F "." '{print $2}')

# Get Xcode CLI tools
# https://devimages.apple.com.edgekey.net/downloads/xcode/simulators/index-3905972D-B609-49CE-8D06-51ADC78E07BC.dvtdownloadableindex
TOOLS=clitools.dmg
if [ ! -f "$TOOLS" ]; then
  if [ "$OSX_VERS" -eq 7 ]; then
	  DMGURL=http://devimages.apple.com/downloads/xcode/command_line_tools_for_xcode_os_x_lion_april_2013.dmg
  elif [ "$OSX_VERS" -eq 8 ]; then

alvinlai

Install OS X 10.10 Yosemite in VirtualBox

(based on this pastebin i've found via Google, markdownified and adjusted to work with the official Yosemite release)

Yosemite's first developer preview was released right after Monday's WWDC opening keynote. For the general public, an open beta will be available to download later this summer. However, for those who want a sneak peek at the new hotness, there is a way to safely install it without risking your machine, using the free and powerful VirtualBox application from Oracle.

(LEGAL DISCLAIMER: This guide aims to explain how to create a virtual machine on a regularly purchased Apple computer, running a genuine Mac OS X operating system, for testing purposes only.)

alvinlai

do shell script "xcode-select --install"
do shell script "sleep 1"

tell application "System Events"
	tell process "Install Command Line Developer Tools"
		keystroke return
		click button "Agree" of window "License Agreement"
	end tell
end tell

alvinlai

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

alvinlai

require './hash-table'

describe MyHash do
  rspec_hash = MyHash.new

  describe '#assign_or_find_index' do
    it 'should return a number between 0 and 100' do
      random_string = (0...8).map { (65 + rand(26)).chr }.join
      expect(rspec_hash.assign_or_find_index(random_string)).to be_between(0, 100)
    end

alvinlai

class MyHash
  attr_reader :buckets

  def initialize
    @buckets = []
  end

  def assign_or_find_index(k)
    special_function(k) % 100
  end

alvinlai

//
//  RVNReceiptValidation.m
//
//  Created by Satoshi Numata on 12/06/30.
//  Copyright (c) 2012 Sazameki and Satoshi Numata, Ph.D. All rights reserved.
//
//  This sample shows how to write the Mac App Store receipt validation code.
//  Replace kRVNBundleID and kRVNBundleVersion with your own ones.
//
//  This sample is provided because the coding sample found in "Validating Mac App Store Receipts"

alvinlai

Experimental Generation of Interpersonal Closeness

Instructions to Subjects Included With Task Slips Packet

This is a study of interpersonal closeness, and your task, which we think will be quite enjoyable, is simply to get close to your partner. We believe that the best way for you to get close to your partner is for you to share with them and for them to share with you. Of course, when we advise you about getting close to your partner, we are giving advice regarding your behavior in this demonstration only, we are not advising you about your behavior outside of this demonstration.

In order to help you get close we've arranged for the two of you to engage in a kind of sharing game. You're sharing time will be for about one hour, after which time we ask you to fill out a questionnaire concerning your experience of getting close to your partner.

You have been given three sets of slips. Each slip has a question or a task written on it. As soon as you both finish reading these instructions, you should

alvinlai

#!/bin/bash

# Start/stop an EC2 instance for use as an ssh tunnel
# requires the aws package locally -- sudo apt-get install awscli
#
# usage: ./tunnel.sh start (spin up EC2 and create the tunnel)
#        ./tunnel.sh stop (terminate the EC2 instance to save money)
#        ./tunnel.sh resume (in case your tunnel is interrupted but the EC2 instance is still running)

# CHANGE THE PARAMETERS BELOW

alvinlai

import cv2.cv as cv
import tesseract
gray = cv.LoadImage('captcha.jpeg', cv.CV_LOAD_IMAGE_GRAYSCALE)
cv.Threshold(gray, gray, 231, 255, cv.CV_THRESH_BINARY)
api = tesseract.TessBaseAPI()
api.Init(".","eng",tesseract.OEM_DEFAULT)
api.SetVariable("tessedit_char_whitelist", "0123456789abcdefghijklmnopqrstuvwxyz")
api.SetPageSegMode(tesseract.PSM_SINGLE_WORD)
tesseract.SetCvImage(gray,api)
print api.GetUTF8Text()