December 2014
Beginner
336 pages
7h 41m
English
book
Learn Ruby the Hard Way: A Simple and Idiomatic Introduction to the Imaginative World of Computational Thinking with Code, Third Edition
by Zed A. Shaw
Content preview from Learn Ruby the Hard Way: A Simple and Idiomatic Introduction to the Imaginative World of Computational Thinking with Code, Third EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Exercise 34. Accessing Elements of Arrays
Arrays are pretty useful, but unless you can get at the things in them, they aren’t all that useful. You can already go through the elements of an array in order, but what if you want the fifth element? You need to know how to access the elements of an array. Here’s how you would access the first element of an array:
animals = ['bear', 'tiger', 'penguin', 'zebra'] bear = animals[0]
You take an array of animals, and then you get the first (1st) one using 0?! How does that work? Because of the way math works, Ruby starts its arrays at 0 rather than 1. It seems weird, but there are many advantages to this, even though it is mostly arbitrary.
The best way to explain why is by ...
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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.
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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.