Category Archives: software-engineering

A two-dimensional dictionary

Posted on 2013-03-15 by Graham

What? A thing I made has just been open-sourced by my employers at Agant: the AGTTwoDimensionalDictionary works a bit like a normal dictionary, except that the keys are CGPoints meaning we can find all the objects within a given rectangle. … Continue reading →

Posted in code-level, iPad, iPhone, Mac, OOP, performance, software-engineering | Comments Off

The Liskov Citation Principle

Posted on 2013-03-08 by Graham

In her keynote speech at QCon London 2013 on The Power of Abstraction, Barbara Liskov referred to several papers contemporary with her work on abstract data types. I’ve collected these references and found links to free copies of the articles … Continue reading →

Posted in code-level, documentation, OOP, software-engineering, Talk | 2 Comments

When all you have is a NailFactory…

Posted on 2013-03-07 by Graham

…every problem looks like it can be solved by configuring a different nail. We have an obsession with tools in the software industry. We’ve built tools for building software, tools for testing software, tools for recording how the software is … Continue reading →

Posted in advancement of the self, software-engineering | Comments Off

An observation designed to aid the reading of books on software

Posted on 2013-02-04 by Graham

Wherever a book on writing software describes the 1968 NATO conference in Garmisch on Software Engineering, consider whether the clarity of the argument can be improved by adding the following parenthetical clause: […], a straw man version of an otherwise … Continue reading →

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Retiring the “Apple developers are insular” meme

Posted on 2013-01-13 by Graham

There’s an old trope used in discussions of Mac and iOS developers, that says they’re too inward-looking. They only think about software in ways that have been “blessed” by Apple, their platform vendor. I’m pretty sure that I’ve used this … Continue reading →

Posted in advancement of the self, code-level, Responsibility, software-engineering | Comments Off

Server-side Objective-C

Posted on 2012-12-12 by Graham

Recently, Kevin Lawler posted an “Informal Technical Note” saying that Apple could clean up on licence sales if only they’d support web backend development. There are only two problems with this argument: it’s flawed, and the precondition probably won’t be … Continue reading →

Posted in code-level, OOP, server, software-engineering, WebObjects | Comments Off

Can code be “readable”?

Posted on 2012-12-08 by Graham

Did Isaac Asimov write good stories? Different people will answer that question in different ways. People who don’t read English and don’t have access to a translation will probably be unable to answer. People who don’t like science fiction on … Continue reading →

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I published a new book!

Posted on 2012-12-04 by Graham

Executive summary: it’s called APPropriate Behaviour, head over to the LeanPub site to check it out. For quite a while, I’ve noticed that posts here are moving away from nuts and bolts code towards questions about evaluating my own performance, … Continue reading →

Posted in advancement of the self, books, Business, code-level, Responsibility, software-engineering | Comments Off

Surprising ARC performance characteristics

Posted on 2012-11-28 by Graham

The project I’m working on at the moment has quite tight performance constraints. It needs to start up quickly, do its work at a particular rate and, being an iOS app, there’s a hard limit on how much RAM can … Continue reading →

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