September 2018
Beginner
186 pages
4h 30m
English
Content preview from Bash Quick Start Guide
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Combining parameter expansion forms
You cannot combine the preceding parameter expansion forms into one expansion; "${myvar:-foo#.ext}" does not do what you might hope. You could use a temporary variable instead, to run them one at a time:
#!/bin/bash
temp="${myvar:-foo}"
printf '%s\n' "${temp#.ext}"
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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.
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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.