August 2014
Intermediate to advanced
120 pages
2h 45m
English
Content preview from Mastering Clojure Macros
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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.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.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.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.
Code-Walking Macros
Let’s say you’re a former Ruby developer, and you really miss the feature of Ruby that allows any method, class, or module definition to act as an implicit begin (Ruby’s version of try). In other words, you’d like to be able to write this code in Clojure:
| language_features/implicit_try_1.clj | |
| | (defn delete-file [path] |
| | (clojure.java.io/delete-file path) |
| | (catch java.io.IOException e false)) |
This code doesn’t work in Clojure, of course—you’ll get a compiler exception if you try to type that in at your REPL. You’d need to wrap a try expression around everything following the argument list to get it to work as you want. Take a moment and think about what it would take to have this code work. One option would be to file an ...
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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.
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.