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995 B
title |
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Learn About Ruby Arrays |
Basics:
- Arrays are a list of indexed items stored inside
<a href='http://ruby-doc.org/core-2.2.0/Array.html' target='_blank' rel='nofollow'>]
brackets. - Ruby uses zero-based indexing. This means the first item in the array is stored in index number
0
, then the second is at index number1
, and so on incrementing by values of 1 for each additional item stored in the array. - Arrays can be created using
[]
orArray.new
syntax. - Ruby has many build in methods to perform operations on arrays such as reversing or finding an element stored in the array.
Examples:
arr = [1,2,3]
# is equivalent to:
arr = Array.new(3)
arr[0] = 1
arr[1] = 2
arr[2] = 3
# is also equivalent to:
arr = Array(1..3)
# All three of these examples return:
[1,2,3]