February 2018
Intermediate to advanced
340 pages
9h 43m
English
Content preview from Go Standard Library Cookbook
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Getting and setting environment variables with default values
The previous recipe, Creating a program interface with the flag package, describes how to use flags as program parameters.
The other typical way of parameterization, especially for larger applications, is the configuration with the use of environment variables. Environment variables as a configuration option significantly simplify the deployment of the applications. These are also very common in cloud infrastructure.
Usually, the configuration of a database connection for a local and for an automated build environment is different.
If the configuration is defined by the environment variables, it is not necessary to change the application config files or even the application code. ...
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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.