First Class Commands: The 2017 Edition
summary
Argues that turning method invocations into first-class commands lets code serialize, debounce, inspect and persist edits; shows JavaScript buffer examples that return Edit objects, a job queue pattern and use of Ember Concurrency task instances; implements reversible edits for undo/redo histories and demonstrates multi-user convergence via operational transform with GUIDs (Alice, Bob, Carol test) — prototype code and sync tests run and finally converge correctly.
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chapters (8)
- 0:00Start
- 0:09First-Class Commands an unexpectedly fertile design pattern
- 2:46the canonical example: mutable data
- 9:26storing invocations
- 22:20transforming invocations
- 48:36how does differential synchronization differ from the command pattern?
- 50:15distributed version control
- 55:00separation of concerns
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