April 2020
Intermediate to advanced
506 pages
20h 7m
Polish
Content preview from Go
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116 Rozdział 4.
Własne pakiety
Znów powtarzający się kod…
Jeśli znajdziemy błąd w funkcji getFloat,
naprawianie go w dwóch miejscach będzie
kłopotliwe. Jednak funkcja znajduje się
w dwóch różnych programach, dlatego chyba
nic się nie da zrobić…
func getFloat() (float64, error) {
reader := bufio.NewReader(os.Stdin)
input, err := reader.ReadString(‘\n’)
if err != nil {
return 0, err
}
input = strings.TrimSpace(input)
number, err := strconv.ParseFloat(input, 64)
if err != nil {
return 0, err
}
return number, nil
}
A jednak można coś zrobić — przenieść
wspólną funkcję do nowego pakietu!
Go umożliwia definiowanie własnych pakietów. W
rozdziale 1
. zostało ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.