Krishna

#!/usr/bin/ruby
# encoding: utf-8
#
# Updated 2017-10-25:
# - Defaults to large size (512)
# - If ImageMagick is installed:
#     - rounds the corners (copped from @bradjasper, https://github.com/bradjasper/Download-iTunes-Icon/blob/master/itunesicon.rb)
#     - replace original with rounded version, converting to png if necessary
# 
# Retrieve an iOS app icon at the highest available resolution

Krishna

In August 2007 a hacker found a way to expose the PHP source code on facebook.com. He retrieved two files and then emailed them to me, and I wrote about the issue:

http://techcrunch.com/2007/08/11/facebook-source-code-leaked/

It became a big deal:

http://www.techmeme.com/070812/p1#a070812p1

The two files are index.php (the homepage) and search.php (the search page)

Krishna

class EmployeesController < ApplicationController
  before_action :authenticate_user!
  before_action :set_employee, only: [:show, :edit, :update, :destroy]

  def index
    @employees = current_user.employees.all  # I guess the problem is that this returns a collection
                                             # of User objects. But the url_helper will expect objects
                                             # of class Employee (which does not exist).
  end

Krishna

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:

Krishna

➜  Sinatra Lab  curl -v http://localhost:4567/cache
* Hostname was NOT found in DNS cache
*   Trying ::1...
* connect to ::1 port 4567 failed: Connection refused
*   Trying 127.0.0.1...
* Connected to localhost (127.0.0.1) port 4567 (#0)
> GET /cache HTTP/1.1
> User-Agent: curl/7.37.1
> Host: localhost:4567
> Accept: */*

Krishna

def open_links_in_safari(project_links)
	project_links_arguments = project_links.join(" ")  # project_links in an array of url strings
	cmd_line = "osascript newsafariwindow.scpt #{project_links_arguments}"
	system(cmd_line)
end

Krishna

(swift) 
(swift) func greet(name :String) -> String
        { return "hello /(name)" }
(swift) 
(swift) greet
// r0 : (String) -> String = (Function)
(swift) 
(swift) var temp = [greet]
// temp : Array<(String) -> String> = [(Function)]

Krishna

I like Learn You a Haskell as a reference and cheat-sheet but I found it a little slow for learning Haskell.

Here's my recommended order for just learning Haskell:

http://www.seas.upenn.edu/~cis194/lectures.html Brent Yorgey's course is the best I've found so far and replaces both Yann Esposito's HF&H and the NICTA course. This course is particularly valuable as it will not only equip you to write Haskell but also help you understand parser combinators.

Real World Haskell is available online. (Thanks bos!)

I recommend RWH as a reference (thick book). The chapters for parsing and monads are great for getting a sense for where monads are useful. Other people have said that they've liked it a lot. Perhaps a good follow-up for practical idioms after you've got the essentials of Haskell down?

Krishna

Generate the list yourself:

$ cd /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/
  Developer/SDKs/iPhoneOS*.sdk/System/Library/Frameworks/UIKit.framework/Headers
$ grep -H UI_APPEARANCE_SELECTOR ./* | sed 's/ __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_5_0) UI_APPEARANCE_SELECTOR;//'

UIActivityIndicatorView

Krishna

//
//  StickyHeaderLayout.h
//  Wombat
//
//  Created by Todd Laney on 1/9/13.
//  Copyright (c) 2013 ToddLa. All rights reserved.
//
//  Modified from http://blog.radi.ws/post/32905838158/sticky-headers-for-uicollectionview-using THANKS!
//