Robb broome rubyconf x presentation for publication

Rubyconf X

Thursday, November 18, 2010

Chelimsky::Dry

• every time you reduce duplication you increase coupling by introducing new dependencies

Chelimsky::Dry

• metaprogram only when you really do not know the conditions

Chelimsky::Dry

• metaprogram only when you really do not know the conditions

• DRY. What does it mean?

Chelimsky::Dry

• Does not mean: “don’t type anything twice”

Chelimsky::Dry

• Every piece of knowledge

Chelimsky::Dry

• must have a

Chelimsky::Dry

• must have a

• single,

Chelimsky::Dry

• must have a

• single,

• unambiguous,

Chelimsky::Dry

• must have a

• single,

• unambiguous,

• authoritative representation

Chelimsky::Dry

• must have a

• single,

• unambiguous,

• authoritative representation

• within a system

Chelimsky::Dry

• before filters for orthogonal stuff:

Chelimsky::Dry

• authentication

Chelimsky::Dry

• authentication

• logging

Chelimsky::Dry

• authentication

• logging

• not for finding records

• rails3

• short branches (2days)

• change code or tests, not both

• or, refactor up a level

• deprecation isolation (compat module)

• check out tests on the depot app

• ruby 2.0

• by christmas

• ruby 2.0

• by christmas

• whatever year

• ruby 2.0

• by christmas

• whatever year

• embedded ruby

opengovcodeforamerica

sunlight fdn• making gov data openly and freely available

• building apis with mongo db - eric mill, sunlight foundation / labs

• -> json view chrome extension

• sections argument , range arguments in url determine what’s returned

• different calls each map to dup'd data in the mongo db

• each call maps to a whole data structure in mongo

• crowdsourcing (guardian example). Needs a framework

aaron patterson@tenderlove

• zomg

• rewrote arel

• zomg

• rewrote arel

• superficial vs deep refactoring

• zomg

• rewrote arel

• 6 weeks

• zomg

• rewrote arel

• 6 weeks

• working on integ with mongo

does ruby scale?

• benchmark over time

• inject is way slower than hash & a map

• Hash.[@list.map{|val| ... }]

• class_eval is way faster than define_method because dm uses a proc activation

• attr_reader way faster than a method

jake scruggs

• Metric_fu

• The great thing about standards is that there are so many to choose from

• when to fix, when to refactor (flog>60)

• high churn objects desire better test cov

polite programmer’s guide

• testing private methods?

• monkey-patch. evil or not?

• fail if instance_methods.map.... include?(:mymethod)

• new method v existing

• delegate vertically if you own, horizontally if not

Scott Chacongithub

Scott Chacongithub$ git describe HEAD

v0.2.4-25-g8a3f93b

$ git describe HEAD@{1.month.ago}

v0.2.4-25-g8a3f93b

$ git describe HEAD@{1.month.ago}v0.2.4-6-gf51a8ba

v0.2.4-25-g8a3f93b

git log --oneline --decorate --graph

v0.2.4-25-g8a3f93b

git bundle create repo.bundle master

v0.2.4-25-g8a3f93b

git clone repo.bundle -b master repo

v0.2.4-25-g8a3f93b

git branch --merged

v0.2.4-25-g8a3f93b

git branch --merged

git branch --no-merged

v0.2.4-25-g8a3f93b

git branch --merged

git branch --no-merged

git rerere (Reuse Recorded Resolution)

monkey-patching

freedom-patching

monkey-patching

freedom-patching

ruby is your friend, not your parents

ruby - guidance

java - enforcement

ruby is for consenting adults

DHHBFF

Resources

• Video: http://confreaks.net/events/rubyconf2010

• Matz Keynote: http://www.slideshare.net/yukihiro_matz/rubyconf-2010-keynote-by-matz

• Overall: http://zero2railshero.tumblr.com/post/1592771138/rubyconf-new-orleans-awesome-twosome

Resources

• Chelimsky: http://blog.davidchelimsky.net/wp-content/uploads/2010/11/duplication.pdf

• online sessions: http://rubyconfirmate.heroku.com/conference_sessions

• opengov: http://sunlightlabs.com/

• git-tips.heroku.com

• Scott Chacon: bit.ly/classygit must-see introduction

• Speaker’s Videos: http://confreaks.net/events/rubyconf2010 up in a week or so

• dave thomas: @pragdave keynote: http://www.slideshare.net/prqgdave/rubyconfx-keynote

• james edward gray II @jeg2: http://www.slideshare.net/JamesEdwardGrayII/unblocked

• poisioning rubinius: @brixen http://slidesha.re/cLdpsc

Robb broome rubyconf x presentation for publication

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Transcript of Robb broome rubyconf x presentation for publication

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