May 2001
Intermediate to advanced
720 pages
23h 24m
English
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Name
Object.__proto__ Property — a reference to the object’s constructor’s prototype property
Availability
Flash 5
Synopsis
someObject.__ proto__
Access
Read/write (Overwriting an object’s __ proto__ property is not recommended as it alters the
natural structure of class inheritance.)
Description
The __ proto__ property stores a reference to the
automatically-assigned prototype property of
someObject’s constructor function,
which is used to transfer properties down through a class hierarchy.
An object’s __ proto__ property is mostly
used internally by the interpreter to look up inherited properties
for an object, but we can also use it to determine the class of an
object, as shown in Example 12.6 and Example 12.9. Note that __ proto__
begins and ends with two underscore characters.
See Also
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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.