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Mastering Chef

You're reading from   Mastering Chef Build, deploy, and manage your IT infrastructure to deliver a successful automated system with Chef in any environment

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Product type Paperback
Published in Jun 2015
Publisher
ISBN-13 9781783981564
Length 374 pages
Edition 1st Edition
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Author (1):
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Mayank Joshi Mayank Joshi
Author Profile Icon Mayank Joshi
Mayank Joshi
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Table of Contents (15) Chapters Close

Preface 1. Introduction to the Chef Ecosystem FREE CHAPTER 2. Knife and Its Associated Plugins 3. Chef and Ruby 4. Controlling Access to Resources 5. Starting the Journey to the World of Recipes 6. Cookbooks and LWRPs 7. Roles and Environments 8. Attributes and Their Uses 9. Ohai and Its Plugin Ecosystem 10. Data Bags and Templates 11. Chef API and Search 12. Extending Chef 13. (Ab)Using Chef Index

Arrays


Arrays and hashes are perhaps the two data structures that will be used the most by developers who are writing the Chef code. Be it fetching attributes or values from data bags, you'll be finding these two data structures almost everywhere.

Arrays are an ordered collection of objects that can be accessed through an integer index. Each element of an array can be referenced through an index. The first element of the array is referenced through index number 0 and so on. Ruby also provides support for negative integers as indexes. -1 refers to the last element of the array, -2 is the second last element, and so on.

Unlike other languages, arrays in Ruby aren't tied to one single data type, and they aren't fixed in size either. Ruby arrays grow automatically while elements are added to it. Ruby arrays can also hold other array objects, thereby allowing us to set up multidimensional arrays.

Creating an array

There are multiple ways to create arrays.

Way 1—using the new method of the Array class...

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