DOM Traversal Methods

Instead of a two-dimensional result array, the map forms a flattened one:
Before: 0,1,52,97
After: -45,0,-44,1,7,2,52,3
$.merge()
Merge the contents of two arrays together into the first array.
$.merge(array1, array2)
Parameters
• array1: The first array to merge
•
array2: The second array to merge
Return Value
An array consisting of elements from both supplied arrays.
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Chapter 8
Description
The $.merge() operation forms an array that contains all elements from the two
arrays, with duplicates removed. The order of items in the first array is preserved,
with items from the second array appended:
var array1 = [0, 1, 52];
var array2 = [52, 97];
$(this).log('Array 1: ' + array1);
$(this).log('Array 2: ' + array2);
array = $.merge(array1, array2);
$(this).log('After: ' + array);
The resulting array contains all four distinct items:
Array 1: 0,1,52
Array 2: 52,97
After: 0,1,52,97
The $.merge() function is destructive. It alters the first parameter to add the items
from the second. If you need the original first array, make a copy of it before calling
$.merge(). Fortunately, $.merge() itself can be used for this duplication:
var newArray = $.merge([], oldArray);
This shortcut creates a new, empty array and merges the contents of oldArray into
it, effectively cloning the array.