Building Better Developers

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A SYMFONY LIVE PRODUCTION A SYMFONY LIVE PRODUCTION BUILDING BETTER BUILDING BETTER DEVELOPERS DEVELOPERS ROWAN MEREWOOD PRESENTS ROWAN MEREWOOD PRESENTS

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BIG PHILOSOPHICAL QUESTIONS BIG PHILOSOPHICAL QUESTIONS

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BIG PHILOSOPHICAL QUESTIONS BIG PHILOSOPHICAL QUESTIONS “ “Who am I and why am I here?” Who am I and why am I here?” Software Engineer and Team Lead Software Engineer and Team Lead at at Inviqa Inviqa, Sheffield , Sheffield

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BIG PHILOSOPHICAL QUESTIONS BIG PHILOSOPHICAL QUESTIONS “ “Who am I and why am I here?” Who am I and why am I here?” Twitter: Twitter: @rowan_m @rowan_m Blog: Blog: http://merewood.org http://merewood.org GitHub: GitHub: https://github.com/rowan-m https://github.com/rowan-m Joind.in: Joind.in: http://joind.in/user/view/118 http://joind.in/user/view/118 IMDb: IMDb: http://www.imdb.com/name/nm1412348 http://www.imdb.com/name/nm1412348 Google+: Google+: https://plus.google.com/u/1/111813845727005160164 https://plus.google.com/u/1/111813845727005160164

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SELF IMPROVEMENT SELF IMPROVEMENT

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SELF IMPROVEMENT SELF IMPROVEMENT “ “I am a massive tool.” I am a massive tool.” Let's get that one out of the way right at the start Let's get that one out of the way right at the start

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OUR SAD AVERAGE DEV OUR SAD AVERAGE DEV

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OUR SAD AVERAGE DEV OUR SAD AVERAGE DEV “ “Perfection is achieved, not when Perfection is achieved, not when there is nothing more to add, but there is nothing more to add, but when there is nothing left to take when there is nothing left to take away.” away.” Antoine de Saint-Exupéry Antoine de Saint-Exupéry

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NO CAPES NO CAPES

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NO CAPES NO CAPES S S

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NO CAPES NO CAPES You're never going to be the best at everything You're never going to be the best at everything You don't need to burn out trying You don't need to burn out trying Other people will have to save you Other people will have to save you S S

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YOUR EDITOR IS PART OF YOU YOUR EDITOR IS PART OF YOU

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YOUR EDITOR IS PART OF YOU YOUR EDITOR IS PART OF YOU Tools are there to achieve goals Tools are there to achieve goals You are a professional, You are a professional, your tools are complicated your tools are complicated

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HOLE HAWG HOLE HAWG

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HOLE HAWG HOLE HAWG “ “I never blamed the Hole Hawg; I blamed myself. The Hole I never blamed the Hole Hawg; I blamed myself. The Hole Hawg is dangerous because it does exactly what you tell it to. Hawg is dangerous because it does exactly what you tell it to. Now I view them all with such contempt that I do not even Now I view them all with such contempt that I do not even consider them to be real drills--merely scaled-up toys consider them to be real drills--merely scaled-up toys designed to exploit the self-delusional tendencies of designed to exploit the self-delusional tendencies of soft-handed homeowners who want to believe that they have soft-handed homeowners who want to believe that they have purchased an actual tool” purchased an actual tool” Neal Stephenson Neal Stephenson http://www.team.net/mjb/hawg.html http://www.team.net/mjb/hawg.html

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VIM VIM

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VIM VIM

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VIM VIM

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VIM VIM

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VIM VIM

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VIM VIM

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DELIBERATE PRACTICE DELIBERATE PRACTICE

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DELIBERATE PRACTICE DELIBERATE PRACTICE

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DELIBERATE PRACTICE DELIBERATE PRACTICE Kata ( Kata ( 型型 or or 形形 literally: "form") literally: "form") Deliberate, controlled, repeated Deliberate, controlled, repeated

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DELIBERATE PRACTICE DELIBERATE PRACTICE Kata ( Kata ( 型型 or or 形形 literally: "form") literally: "form") Deliberate, controlled, repeated Deliberate, controlled, repeated Code Kata – Code Kata – Dave Thomas Dave Thomas http://codekata.pragprog.com/2007/01/code_kata_backg.html http://codekata.pragprog.com/2007/01/code_kata_backg.html TDD Kata – TDD Kata – Roy Osherove Roy Osherove http://osherove.com/tdd-kata-1/ http://osherove.com/tdd-kata-1/

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Create a simple String calculator with a method: Create a simple String calculator with a method: int Add(string numbers) int Add(string numbers) 1. 1. The method can take 0, 1 or 2 numbers, and will return their The method can take 0, 1 or 2 numbers, and will return their sum (for an empty string it will return sum (for an empty string it will return 0 0) for example “” or “ ) for example “” or “1 1” or ” or “ “1,2 1,2” ” 2. 2. Start with the simplest test case of an empty string and move to Start with the simplest test case of an empty string and move to 1 and two numbers 1 and two numbers 3. 3. Remember to solve things as simply as possible so that you Remember to solve things as simply as possible so that you force yourself to write tests you did not think about force yourself to write tests you did not think about 4. 4. Remember to refactor after each passing test Remember to refactor after each passing test TDD KATA TDD KATA

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TDD KATA TDD KATA

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TDD KATA TDD KATA

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TDD KATA TDD KATA

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MASTER YOUR CRAFT MASTER YOUR CRAFT

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MASTER YOUR CRAFT MASTER YOUR CRAFT

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MASTER YOUR CRAFT MASTER YOUR CRAFT Dreyfus model of skill acquisition Dreyfus model of skill acquisition Novice Novice ⬎ ⬎ Beginner Beginner ⬎ ⬎ Competent Competent ⬎ ⬎ Proficient Proficient ⬎ ⬎ Expert Expert

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MASTER YOUR CRAFT MASTER YOUR CRAFT 1. 1.Innocent Innocent 2. 2.Exposed Exposed 3. 3.Apprentice Apprentice 4. 4.Practitioner Practitioner 5. 5.Journeyman Journeyman 6. 6.Master Master 7. 7.Researcher Researcher The Seven Stages The Seven Stages Of Expertise In Of Expertise In Software Engineering Software Engineering http://www.wayland-informatics.com/The%20Seven%20Stages%20of%20Expertise%20in%20Software.htm http://www.wayland-informatics.com/The%20Seven%20Stages%20of%20Expertise%20in%20Software.htm

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MASTER YOUR CRAFT MASTER YOUR CRAFT http://www.wayland-informatics.com/The%20Seven%20Stages%20of%20Expertise%20in%20Software.htm http://www.wayland-informatics.com/The%20Seven%20Stages%20of%20Expertise%20in%20Software.htm Productivity Productivity Stage Stage 1 1 6 6 5 5 4 4 3 3 2 2 7 7

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MEASURE WHAT MATTERS MEASURE WHAT MATTERS

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MEASURE WHAT MATTERS MEASURE WHAT MATTERS X X

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MEASURE WHAT MATTERS MEASURE WHAT MATTERS Measure systems Measure systems Don't measure people Don't measure people (they'll just mess it up) (they'll just mess it up) X X

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MEASURE WHAT MATTERS MEASURE WHAT MATTERS Measure systems Measure systems Don't measure people Don't measure people (they'll just mess it up) (they'll just mess it up) A metric helps you achieve a goal, A metric helps you achieve a goal, don't chase the metric if you achieve the goal. don't chase the metric if you achieve the goal. X X

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“ “T T” ” SHAPED PEOPLE SHAPED PEOPLE

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“ “T T” ” SHAPED PEOPLE SHAPED PEOPLE

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“ “T T” ” SHAPED PEOPLE SHAPED PEOPLE Valve Software – Employee Handbook Valve Software – Employee Handbook http://www.valvesoftware.com/jobs/ http://www.valvesoftware.com/jobs/

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“ “T T” ” SHAPED PEOPLE SHAPED PEOPLE

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NOT THE SHARPEST TOOL NOT THE SHARPEST TOOL

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NOT THE SHARPEST TOOL NOT THE SHARPEST TOOL If you're the smartest person in the room, If you're the smartest person in the room, you're probably not learning anything you're probably not learning anything

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THE SHARPEST TOOL THE SHARPEST TOOL

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THE SHARPEST TOOL THE SHARPEST TOOL John Carmack – id Software John Carmack – id Software

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THE SHARPEST TOOL THE SHARPEST TOOL John Carmack – id Software John Carmack – id Software float float Q_rsqrt Q_rsqrt( ( float float number number ) ) { { long long i i; ; float float x2, y x2, y; ; const float const float threehalfs threehalfs = = 1.5F 1.5F; ; x2 x2 = = number number * * 0.5F 0.5F; ; y y = = number number; ; i i = = * * ( ( long long * * ) ) &y &y; ; // evil floating point bit level hacking // evil floating point bit level hacking i i = = 0x5f3759df 0x5f3759df - ( - ( i i >> >> 1 1 ); ); // what the fuck? // what the fuck? y y = = * * ( ( float float * * ) ) & &i i; ; y y = = y y * * ( ( threehalfs threehalfs - ( - ( x2 x2 * * y y * * y y ) ); ) ); // 1st iteration // 1st iteration // y = y * ( threehalfs - ( x2 * y * y ) ); // 2nd iteration, this can be removed // y = y * ( threehalfs - ( x2 * y * y ) ); // 2nd iteration, this can be removed return return y y; ; } }

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NOT THE SHARPEST TOOL NOT THE SHARPEST TOOL

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NOT THE SHARPEST TOOL NOT THE SHARPEST TOOL

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NOT THE SHARPEST TOOL NOT THE SHARPEST TOOL “ “It took working with John Carmack and other It took working with John Carmack and other high productivity programmers and admitting high productivity programmers and admitting that they were way more productive than me that they were way more productive than me before I really understood how much more before I really understood how much more productive I could be.” productive I could be.” Brian Hook Brian Hook http://bookofhook.blogspot.co.uk/2013/03/smart-guy-productivity-pitfalls.html http://bookofhook.blogspot.co.uk/2013/03/smart-guy-productivity-pitfalls.html

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ADJUST YOUR ATTITUDE ADJUST YOUR ATTITUDE

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ADJUST YOUR ATTITUDE ADJUST YOUR ATTITUDE

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ADJUST YOUR ATTITUDE ADJUST YOUR ATTITUDE “ “The Dude abides.” The Dude abides.”

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ADJUST YOUR ATTITUDE ADJUST YOUR ATTITUDE “ “The Dude abides.” The Dude abides.” Being passionate and authoritative Being passionate and authoritative is not the same as being an angry asshole is not the same as being an angry asshole

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A DIFFERENT ATTITUDE A DIFFERENT ATTITUDE

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A DIFFERENT ATTITUDE A DIFFERENT ATTITUDE “ “Mauro, SHUT THE FUCK UP!” Mauro, SHUT THE FUCK UP!”

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A DIFFERENT ATTITUDE A DIFFERENT ATTITUDE “ “Mauro, SHUT THE FUCK UP!” Mauro, SHUT THE FUCK UP!” “ “To make matters worse, commit f0ed2ce840b3 is clearly total and utter To make matters worse, commit f0ed2ce840b3 is clearly total and utter CRAP even if it didn't break applications.” CRAP even if it didn't break applications.” “ “Shut up, Mauro. And I don't _ever_ want to hear that kind of obvious Shut up, Mauro. And I don't _ever_ want to hear that kind of obvious garbage and idiocy” garbage and idiocy” “ “And you've shown yourself to not be competent in this issue, so I'll And you've shown yourself to not be competent in this issue, so I'll apply it directly and immediately myself.” apply it directly and immediately myself.”

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ADJUST YOUR ATTITUDE ADJUST YOUR ATTITUDE

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ADJUST YOUR ATTITUDE ADJUST YOUR ATTITUDE “ “There's a grocery store near my house that There's a grocery store near my house that I don't like. It's small, dark, and dirty, and it I don't like. It's small, dark, and dirty, and it just makes me uncomfortable. So I never go just makes me uncomfortable. So I never go there. It doesn't make me angry, it doesn't there. It doesn't make me angry, it doesn't offend me, it's just not a place I want to be; offend me, it's just not a place I want to be; there are other grocery stores around that I there are other grocery stores around that I like better. It's not worth my energy to try like better. It's not worth my energy to try and change the place.” and change the place.” Elizabeth Naramore Elizabeth Naramore http://naramore.net/blog/uncomfortable http://naramore.net/blog/uncomfortable

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SPEAK OUT AND BE HEARD SPEAK OUT AND BE HEARD

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SPEAK OUT AND BE HEARD SPEAK OUT AND BE HEARD

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SPEAK OUT AND BE HEARD SPEAK OUT AND BE HEARD Being rational and accepting Being rational and accepting does not mean giving up your principles does not mean giving up your principles

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SPEAK OUT AND BE HEARD SPEAK OUT AND BE HEARD Being rational and accepting Being rational and accepting does not mean giving up your principles does not mean giving up your principles Attack ideas, not people Attack ideas, not people

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JOIN THE COMMUNITY JOIN THE COMMUNITY

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JOIN THE COMMUNITY JOIN THE COMMUNITY

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JOIN THE COMMUNITY JOIN THE COMMUNITY Ok, you can be a hero – just not on your own Ok, you can be a hero – just not on your own

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JOIN THE COMMUNITY JOIN THE COMMUNITY Conferences Conferences Blogs Blogs Podcasts Podcasts Mailing lists Mailing lists Bug reports Bug reports User groups User groups Mentoring Mentoring Patches Patches Pull requests Pull requests Adding tests Adding tests Money Money Pizza and beer Pizza and beer Equipment Equipment Build RCs Build RCs Invest in employees Invest in employees Test-fests Test-fests Sponsor stuff Sponsor stuff Buy subscriptions Buy subscriptions Ok, you can be a hero – just not on your own Ok, you can be a hero – just not on your own

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ENJOY WHAT YOU DO ENJOY WHAT YOU DO

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ENJOY WHAT YOU DO ENJOY WHAT YOU DO

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ENJOY WHAT YOU DO ENJOY WHAT YOU DO “ “Let's put a smile on that face.” Let's put a smile on that face.”

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ENJOY WHAT YOU DO ENJOY WHAT YOU DO “ “Let's put a smile on that face.” Let's put a smile on that face.” This is a career, a profession, a life-style choice, This is a career, a profession, a life-style choice, not just a 9 'til 5 job not just a 9 'til 5 job

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Could this Dev... Could this Dev... Be you? Be you? WE'RE HIRING WE'RE HIRING

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HTTP://JOIND.IN/9333 HTTP://JOIND.IN/9333 Thank you ! Thank you ! GO AND BE AWESOME GO AND BE AWESOME MANNEQUIN FROM MANNEQUIN FROM DIRECTMANNEQUINS.CO.UK DIRECTMANNEQUINS.CO.UK - NO MANNEQUINS WERE HARMED IN THE MAKING OF THIS PRESENTATION. - NO MANNEQUINS WERE HARMED IN THE MAKING OF THIS PRESENTATION.