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A Cautionary Tale for Defensive Programmers

Track: Coding and Development | Skill level: Intermediate
Xano

As software developers, we know our software will fail; someone will use it in a way we did not anticipate, we will forget to properly check input, a process will time out, and we will make typos.

For these reasons, and many more, people spend time and efforts on reproducing problems, and finding and fixing root causes. If this hasn’t caused too much of a delay, there may even be time to make sure these problems never show up again.

It is inevitable. Or is it?

This talk will take you through the concept of defensive programming, with its many helpful tools like exceptions, assertions, typing, and validation. It will elaborate on several programming techniques you can leverage to tell calling code about your problems, and to handle the problems of the code you call yourself. All this will be done in multiple programming languages.

Defensive programming will help you write simpler and more maintainable software, that fails fast, early, and often. When problems do occur, they are reported in greater detail, making them easier to understand, and faster to fix. This limits the time spent fixing bugs, and lowers the chances of ‘random’ or obscure problems, making estimates more reliable.

Keynote Speakers

Matt Glaman

Matt Glaman

(Saturday keynote)

Matt Glaman is a developer at Commerce Guys. He is an open source developer who has been working with Drupal since 2013. He is author of the Drupal 8 Development Cookbook, maintainer of ContribKanban.com, and lover of Irish Whiskey.

Twitter: @nmdmatt

Jeffrey A 'JAM' McGuire

Jeffrey A. "jam" McGuire

(Sunday keynote)

Jeffrey A. "jam" McGuire—Evangelist, Developer Relations at Acquia—is a memorable and charismatic communicator with a strong following at the intersection of open source software, business, and culture. He is a frequent keynote speaker at events around the world. He writes and talks about technology, community, and more on weekly podcasts and as a blogger on dev.acquia.com. This all helps satisfy his inner diva, which he also feeds with performances as a storyteller and musician.

Twitter: @horncologne

Danese Cooper

Danese Cooper

(Sunday closing keynote)

Danese Cooper currently serves as chairperson of the Node.js Foundation. She also works in an open source role at PayPal. Previously she was Director of the Open Source Hardware Association and CTO of the Wikimedia Foundation. She had brief stint at the Bill & Melinda Gates Foundation as a consulting open source strategist. She has been involved with open source since 1999.

Twitter: @divadanese

CxO Day Speakers

Sarah Wood OBE

Unruly Co-Founder (CEO)

Sarah Wood

David Axmark

Co-founder of MySQL

David Axmark

Ben Finn OBE

Co-Founder of Sibelius and CEO at Stealth Poker

Ben Finn

Barney Brown

Head of Digital at Cambridge University

Barney Brown

Professor Andre Spicer

Professor of Organisational Behaviour at Cass Business School City, University London

Andre Spicer

Paul Reeves

Reevo UN Limited

Paul Reeves

Sponsors

Diamond

CxO Day

Drupal apprentices

The best people to train new developers are developers

The Drupal Apprenticeship Scheme will be running a London intake in March. If you are interested in hiring an apprentice or know someone who would benefit from the scheme please get in touch via the link below.

  • Created and run by experienced developers
  • Teaches core skills and best practice
  • Extensive support for businesses and teams

We are also really keen to hear from people who might be interested in mentoring, training and helping us to develop and review training materials to make sure they stay absolutely current and relevant.

Find out more

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