June 2000
Beginner
704 pages
14h 55m
English
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Writing Shell Functions
Shell functions are one of the more advanced features of the bash shell programming language. In most programming languages, programmers accumulate snippets of code that are useful in more than one program. To make the reuse of code easier between programs, these snippets of code are grouped into functions. They are essentially subprograms that your shell programs can call. BASIC calls these subroutines; Pascal and Modula-2 call them procedures; and C, C++, and bash call them functions.
Functions usually take an argument or more to pass to them the data they are supposed to work on. The idea is that the code in a function should be packaged in such a way as to make it useful in more than one circumstance. To allow more ...
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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.