June 2014
Intermediate to advanced
536 pages
15h 18m
English
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Chapter 5. The default object (self), scope, and visibility
This chapter covers
- The role of the current or default object, self
- Scoping rules for local, global, and class variables
- Constant lookup and visibility
- Method-access rules
In describing and discussing computer programs, we often use spatial and, sometimes, human metaphors. We talk about being “in” a class definition or returning “from” a method call. We address objects in the second person, as in obj.respond_to?("x") (that is, “Hey obj, do you respond to 'x'?”). As a program runs, the question of which objects are being addressed, and where in the imaginary space of the program they stand, constantly shifts.
And the shifts aren’t just metaphorical. The meanings of identifiers shift ...
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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.