Patterns of Software Change Michael Feathers Groupon Wednesday, - PowerPoint PPT Presentation

Patterns of Software Change Michael Feathers Groupon Wednesday, June 20, 2012

Architecture |ˈärkiˌtek ch ər| noun , the part of a system that you can not replace without having a different system Wednesday, June 20, 2012

Unintentional Coupling is Inevitable Wednesday, June 20, 2012

Unintentional Coupling is Inevitable Wednesday, June 20, 2012

Class: - Handles Tax Calculation - Handles Charges & Discounts Wednesday, June 20, 2012

Class: - Handles Tax Calculation - Handles Charges & Discounts Someone decides taxes can be modeled as a charge Wednesday, June 20, 2012

Validation in the Model or the Controller? Wednesday, June 20, 2012

Organic Patterns Designer Christopher Poehlmann Wednesday, June 20, 2012

Piecemeal Growth Is the Hallmark of Organic Systems Wednesday, June 20, 2012

Piecemeal Growth Biases Toward Existing Structure Wednesday, June 20, 2012

Architecture |ˈärkiˌtek ch ər| noun , the part of a system that you can not replace without having a different system Wednesday, June 20, 2012

The Antidote to Stagnation is Continual Renewal Wednesday, June 20, 2012

..and appreciation for things we can’t change Wednesday, June 20, 2012

Self-Induced Disruption Wednesday, June 20, 2012

Card Checking a Design Wednesday, June 20, 2012

Card Checking a Design “What is we did this now?” Wednesday, June 20, 2012

Wednesday, June 20, 2012

Over-Engineering |ˈōvər ˌenjəˈni(ə)ri ng| noun , weighting a possible future too highly in design Wednesday, June 20, 2012

The Coupling Sweet Spot Wednesday, June 20, 2012

The Coupling Sweet Spot Single Responsibility Might Be The Closest Thing We Have, But It Is Not Perfect Wednesday, June 20, 2012

Accidental De-coupling Wednesday, June 20, 2012

Accidental De-coupling The Fitnesse Story Wednesday, June 20, 2012

When to Jump Course Wednesday, June 20, 2012

Activity Flurries Wednesday, June 20, 2012

Turbulence Complexity Commits Wednesday, June 20, 2012

Wednesday, June 20, 2012

Wednesday, June 20, 2012

The Trending View Wednesday, June 20, 2012

Methods Ascending Wednesday, June 20, 2012

Trending Methods Wednesday, June 20, 2012

Static Views Wednesday, June 20, 2012

Classes By Closure Date [["DummiesController", 2008-04-21 13:03:08 -0700], ["Core::ActiveRecord::AttributeDefaults::ClassMethods", 2008-04-22 16:02:54 -0700], ["Legacy::Database", 2008-04-24 15:37:51 -0700], ["Core::ActiveRecord::AttributeDelegation::ClassMethods", 2008-04-24 20:46:58 -0700], ["Core::ActiveRecord::SkipValidationForHasOnes", 2008-04-29 21:54:32 -0700]] Wednesday, June 20, 2012

Classes By Closure Date Wednesday, June 20, 2012

Temporal Correlation of Class Changes [[["App", "Inventory"], 277], [["Inventory", "Object"], 216], [["Admin", "Inventory"], 195], [["Inventory", "User"], 188], [["Inventory", "Users"], 171], [["Inventory", "Deals"], 167], [["App", "Object"], 159], [["App", "InventoryController"], 152], [["Inventory", "Order"], 149], [["User", "Users"], 149], [["App", "User"], 143], [["Inventory", "InventoryController"], 143], [["Api", "Inventory"], 141], [["Admin", "App"], 136], [["Campaign", "Orders"], 134]] Wednesday, June 20, 2012

Temporal Correlation of Class Changes Wednesday, June 20, 2012

Objective vs. Subjective Wednesday, June 20, 2012

Card Checking Can Reduce Metrics Bias Wednesday, June 20, 2012

Self-Induced Disruption (2) Wednesday, June 20, 2012

Apoptosis Wednesday, June 20, 2012

Leveraging Conway Wednesday, June 20, 2012

Understanding the Limits of Growth Wednesday, June 20, 2012