qnoid

@interface Item : NSObject 
{
	@private
		UIImage *image;
		NSString *value;
		NSString *when;
}

@property(nonatomic, retain) UIImage *image;
@property(nonatomic, retain) NSString *value;

qnoid

	 9 
	 6  7  
	 3  4  5
	[0, 1, 2] //buckets
	 ^  ^  ^
	 0  1  2  //bucket index
	|---3---| //hashtable length

qnoid

/*
 *  This file is under the license Attribution-ShareAlike 3.0 Unported 
 *  (CC BY-SA 3.0) http://creativecommons.org/licenses/by-sa/3.0/
 *
 *  You are free:
 *      to Share - to copy, distribute and transmit the work
 *      to Remix - to adapt the work
 *
 *  Under the following conditions:
 *

qnoid

# show the log between two revisions | sort unique to remove all but one blank and '---' lines | awk to NOT match any lines starting with rXXXXX denoting revision information

#$1, $2 range revision arguments

#!/usr/bin/env bash
 
svn log -r $1:$2 | sort -u | awk '!/(^r[0-9]*)/'

qnoid

There has been a crash.

While preparing for an iOS release, observed a crash on an iPad (iOS 4.3.3, WiFi). The crash was fairly consistent to be considered random but once in a while, it would work as expected. On the other hand, an iPad 3 (iOS 5.1, WiFi/3G) wouldn't exhibit the same behaviour.

The crash was triggered at the completion block of an [AFHTTPRequestOperation][1] while parsing a (JSON) response with an empty body to a NSDictionary using [JSONKit][2].

This was an unexpected behaviour since an empty body response was not defined in the request/response contract.

FACTS

1. iPad 4.3.3 WiFi

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Dead end

[Having reached a dead end][7], decided to take a look at the client side in an effort to understand more about the request/response cycle.

First thing was to enable logging for the headers and body of both the [request][1] and the [response][2].

> GET /foo HTTP/1.1  
> "Accept-Encoding" = gzip;  
> "Accept-Language" = [languages];  
> Range = "foo=0-10";  

> "User-Agent" = "[App Bundle Id]/ (unknown, iPhone OS 4.3.3, iPad, Scale/1.000000)";

qnoid

User identity

Disclaimer: I am no security expert.

Use case

Provide a way for a user to identify himself before remotely accessing a multi-user software that requires to associate the user with her data.

Introduction

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Mockups on user identity

[A video of an iOS implementation is available][8].

User identity

[The idea of a user identity][7] is a simple one with a goal to eliminate the requirement of a user entering a password. Any other requirement, including storing, transmitting and hashing should stay the same.

Introduction

As soon as a software is installed that supports user identities, a user is presented with a screen to identify.

qnoid

Last Thursday it was the 3rd annual startups Christmas party at TechCube. Just one day prior, a cofounder from a Scottish startup had walked away after being offered to sign an investment deal.

Negotiations had been going on for months. No one can last that long, unless has substantial savings, takes a loan, his partner/family supports him or has a part time job to cover his living expenses.

It wasn't an easy decision. When you sacrifise that much for that long, it's hard letting go. You have doubts. Doubts about the choice you are about to make. You feel its weight on your shoulders; growing heavy. Accumulated by the moral obligation to your cofounders and people that have invested time in you.

The deal would keep the startup on life support and earn a title. Something to put on a résumé. A badge of honour. Not what you had in mind when you embarked on this endeavour. Signing it would mean lying to yourself, your cofounders, your investors. Far from what you had asked for in the first place.

qnoid

#pod clean
pod() { 
if [ $1 == "clean" ]
then 
xcworkspace=$(find . -maxdepth 1 -name *.xcworkspace)
if [ -z $xcworkspace ]
then
  echo "Already clean"
else
  echo "Will remove Podfile.lock, Pods/ and $xcworkspace"