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Ruby Objects and Classes

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Ruby Classes

1:27 with Jason Seifer

As we’ve been going along learning Ruby, we’ve been working with various types — numbers, strings, arrays, and hashes. Ruby calls these things classes. In this video, we'll learn a bit about what classes are and how to use them.

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    [MUSIC] 0:00
    As we've been going along learning Ruby, we've been working with various types. 0:04
    Numbers, strings, arrays, and hashes. 0:09
    We haven't gotten too far along into what they actually are under the hood though. 0:13
    Although we've been calling these types, Ruby calls these things classes. 0:18
    The types that we've been using so far are all built into Ruby and 0:23
    come along with it when you download or install Ruby as part of Ruby's core API. 0:27
    We're not limited to working only with the built in classes that 0:34
    Ruby provides for us. 0:37
    We can also create our own. 0:39
    Why would we wanna do this? 0:41
    Well, I'm so glad you asked. 0:43
    As we're going along creating a program, 0:45
    it can be cumbersome to remember each small nuanced part of 0:47
    what we're working with and remember those parts in terms that computers understand. 0:50
    We start to abstract that away using representations of 0:56
    things we're used to in the real world. 0:59
    These representations are called classes. 1:03
    You can think of a class as a blueprint. 1:07
    The blueprint tells Ruby how a class should be structured and 1:09
    what it should do. 1:14
    For example, a blueprint of a car would show how a car can be made. 1:15
    What it doesn't do is get into the specific details about an individual car, 1:21
    like the color. 1:26

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