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fix(go func factory): fix func factory example

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previous code did not run because outside main() code was done
This commit is contained in:
Vincent Voyer 2014-07-02 14:37:15 +02:00
parent f90cdc44bb
commit 74c0a49e6d
1 changed files with 14 additions and 4 deletions
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18
go.html.markdown
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@ -192,16 +192,26 @@ func learnFlowControl() {
goto love goto love
love: love:
learnFunctionFactory() // func returning func is fun(3)(3)
learnDefer() // A quick detour to an important keyword. learnDefer() // A quick detour to an important keyword.
learnInterfaces() // Good stuff coming up! 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 // Decorators are common in other languages. Same can be done in Go
// with function literals that accept arguments. // with function literals that accept arguments.
func learnFunctionFactory(mystring string) func(before, after string) string { func sentenceFactory(mystring string) func(before, after string) string {
return func(before, after string) string { return func(before, after string) string {
return fmt.Sprintf("%s %s %s", before, mystring, after) // new string return fmt.Sprintf("%s %s %s", before, mystring, after) // new string
} }
} }
// Next two are equivalent, with second being more practical // Next two are equivalent, with second being more practical