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Things Maybe You Don't Know as a Newer Developer Dan Lew (Yes, that’s me)

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Getting a Job

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Recommendations Mentor Meaty Meet-y?

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Learning

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Sources • Google • Documentation • Books & articles • Classes • Talks • Samples • StackOver fl ow • Code exercises • Open source • Other people

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https://www. fl ickr.com/photos/43810158@N07/8426525097

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The XY Problem How do I get the last
 three characters
 of a fi lename? Did you mean, how 
 do you get 
 a fi le extension? https://commons.wikimedia.org/wiki/File:Two_young_people_demonstrating_a_lively_conversation.jpg

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Take your time • Don’t just copy + paste from StackOver fl ow • Understanding > working • Solution might suck • Easier to modify code later • Build your knowledge base

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Development

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Software development is a non-linear process

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Planning Sketch Discuss Prototype https://www. fl ickr.com/photos/54327699@N02/8108596621

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Design • Rarely one correct design • Save time by avoiding perfectionism • Prefer two-way doors https://commons.wikimedia.org/wiki/File:Set_of_Crash_Bar_Doors.jpg

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Divide & Conquer • Multiple small tasks > one big task • Easier to develop • Easier to review code • Easier to change direction • Easier to merge code

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Hiding Work Avoid fi nal hookup https://www. fl ickr.com/photos/43053584@N00/2395215000 Feature fl ags

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Acronyms • DRY - Don’t Repeat Yourself • YAGNI - You Aren’t Gonna Need It • KISS - Keep It Simple, Stupid

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KISS Example • More states -> more complex • Examples… • Enums > strings, numbers • Immutability > mutation • Pure functions > side e ff ects

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Code Review Focus API Bugs Architecture Maintainability Readability Tests Less important More important

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Code Reviews Embrace Questions Discussions Compliments Avoid Code style Syntax Preferences Nitpicks

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Being a good teammate Get stu ff done Don’t be a jerk Help others https://commons.wikimedia.org/wiki/File:Long_spoons_modern.jpg

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Testing https://commons.wikimedia.org/wiki/File:Laboratory_scientist_conducts_an_experiment_with_a_Rotary_evaporator.jpg

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Two Testing Styles https://www. fl ickr.com/photos/mike_grauer/16898327310/ Manual https://commons.wikimedia.org/wiki/File:Multiple_Server_.jpg Automated

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Why automate? Safer Refactoring Fast Repeatable https://www. fl ickr.com/photos/14246866@N05/2207257172

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Test-driven development Verify un fi nished features Better architecture Faster development https://www. fl ickr.com/photos/katiekrueger/2351656805

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Testing Thoughts • Be tactical w/ test coverage • Flakey tests are worthless • Add manual testing tools

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Debugging • Print is okay • Debuggers are better • Debuggers are not (that) scary https://www.wannapik.com/vectors/67772

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Releasing

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Hitting deadlines • All estimates suck, so deadlines are often incorrect • Better answers than “work harder”: • Over-estimate • Cut scope • Let deadlines slip

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Avoid releasing… When fatigued In a rush Before weekends

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Q&A @danlew@androiddev.social