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fix(go func factory): fix func factory example #662

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Jul 2, 2014
Merged

fix(go func factory): fix func factory example #662

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18 changes: 14 additions & 4 deletions go.html.markdown
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Original file line number Diff line number Diff line change
Expand Up @@ -192,16 +192,26 @@ func learnFlowControl() {
goto love
love:

learnFunctionFactory() // func returning func is fun(3)(3)
learnDefer() // A quick detour to an important keyword.
learnInterfaces() // Good stuff coming up!
}

func learnFunctionFactory() {
// Next two are equivalent, with second being more practical
fmt.Println(sentenceFactory("summer")("A beautiful", "day!"))

d := sentenceFactory("summer")
fmt.Println(d("A beautiful", "day!"))
fmt.Println(d("A lazy", "afternoon!"))
}

// Decorators are common in other languages. Same can be done in Go
// with function literals that accept arguments.
func learnFunctionFactory(mystring string) func(before, after string) string {
return func(before, after string) string {
return fmt.Sprintf("%s %s %s", before, mystring, after) // new string
}
func sentenceFactory(mystring string) func(before, after string) string {
return func(before, after string) string {
return fmt.Sprintf("%s %s %s", before, mystring, after) // new string
}
}

// Next two are equivalent, with second being more practical
Expand Down