Functional config in go

Quick demo of how to initialize your data structure with optional configuration parameters … with sane defaults if left unspecified.

This functional config technique …

• lets you write APIs that can evolve without pain
• provides meaningful configuration parameters
• makes it easy to set default settings
• makes it possible to set complex conditional values

See the posts by Rob Pike (“Self-referential functions and the design of options”) and Dave Cheney (“Functional options for friendly APIs”) for more details on this technique.