October 2015
Beginner to intermediate
246 pages
4h 55m
English
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An introduction to global.R
global.R is a script that is executed before the application launch. For this reason, it can include the same pieces of code to execute the reactive independent processes as previously explained, but it also has an additional capability: the objects generated in global.R can be used both in server.R and UI.R.
Back to our example, imagine that the dataset that is being used changes after a certain time, and rows with certain species are added and removed. In this case, it would be more appropriate that the options in the species selector defined in UI.R are not hard coded but are defined dynamically based upon the Species variable in the dataset, as shown in Example 4 – using global.R.
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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.