How do I implement feature flags in Go?

Feature flags, also known as feature toggles, are a powerful technique to control the visibility of features in your application without deploying new code. This can be very useful for testing, gradual rollouts, and managing features in different environments.

Implementing Feature Flags in Go

In Go, you can implement feature flags using a simple data structure that allows you to enable or disable features based on configurations. Below is a basic example of how you can set up feature flags:

package main import ( "fmt" ) // FeatureFlag struct represents a feature flag type FeatureFlag struct { Enabled bool } // AppConfig holds the application configuration with feature flags type AppConfig struct { Features map[string]FeatureFlag } // Main function to demonstrate feature flags func main() { // Define your feature flags config := AppConfig{ Features: map[string]FeatureFlag{ "NewUI": {Enabled: true}, "BetaFeature": {Enabled: false}, }, } // Check if a feature is enabled before executing its logic if config.Features["NewUI"].Enabled { fmt.Println("New UI is enabled") } else { fmt.Println("Using old UI") } if config.Features["BetaFeature"].Enabled { fmt.Println("Beta feature is enabled") } else { fmt.Println("Beta feature is disabled") } }

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