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Avoiding global state
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| package main | |
| import "fmt" | |
| var Enabled bool | |
| func LogEvent(msg string) { | |
| if Enabled { | |
| fmt.Println(msg) | |
| } | |
| } | |
| func doThing() { | |
| LogEvent("doing a thing") | |
| } | |
| func main() { | |
| Enabled = true | |
| doThing() | |
| } |
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| package main | |
| import "fmt" | |
| type Logger struct { | |
| Enabled bool | |
| } | |
| func (l *Logger) LogEvent(msg string) { | |
| if l.Enabled { | |
| fmt.Println(msg) | |
| } | |
| } | |
| func doThing(l *Logger) { | |
| l.LogEvent("doing a thing") | |
| } | |
| func main() { | |
| l := Logger{Enabled: true} | |
| doThing(l) | |
| } |
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