April 2020
Intermediate to advanced
506 pages
20h 7m
Polish
Content preview from Go
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352 Rozdział 12.
Odraczanie instrukcji
20.25
witaj
10.5
bad-data.txt
Nie można
przekształcić
na typ float64!
$ go run sum.go bad-data.txt
Otwieranie pliku data.txt
2018/04/07 21:18:09 strconv.ParseFloat:
parsing “witaj”: invalid syntax
exit status 1
System Edycja Widok Okno Pomoc
Błędy powodują, że plik nie zostanie zamknięty
Jeśli jednak przekażesz do programu sum.go nieprawidłowo sformatowany
plik, wystąpią problemy. Na przykład plik z wierszem, którego nie można
przetworzyć na wartość typu
float64
, powoduje błąd.
Błędne dane same w sobie nie są niczym złym. W każdym programie czasem zdarzają
się nieprawidłowe dane. Jednak funkcja
GetFloats
po zakończeniu ...
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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.