September 2015
Intermediate to advanced
92 pages
1h 30m
English
Content preview from JavaScript Quick Syntax ReferenceBecome 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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CHAPTER 4
Arrays
An array is a data structure used for storing a collection of values. JavaScript arrays can be grouped into three kinds: numeric, associative, and multidimensional. The distinction between these arrays is only conceptual, as JavaScript considers them all to be array objects.
Numeric Arrays
Numeric arrays store each element in the array with a numeric index. An empty array can be created using the array constructor in the following way.
var a = new Array(); // empty array
To add elements to the array you can reference them one at a time by placing the element’s index inside square brackets. Assigning a value to an element automatically ...
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