August 2019
Beginner to intermediate
798 pages
17h 2m
English
Content preview from Mastering Go - Second Edition
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The flag package
Flags are specially-formatted strings that are passed into a program to control its behavior. Dealing with flags on your own might become very difficult if you want to support multiple flags. Thus, if you are developing UNIX system command-line utilities, you will find the flag package very interesting and useful.
The flag package makes no assumptions about the order of command-line arguments and options, and it prints helpful messages in case there was an error in the way the command-line utility was executed.
The biggest advantage of the flag package is that it is part of the standard Go library, which means that it has been extensively tested and debugged.
I will present two Go programs that use the flag package: a ...
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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.