JavaScript Array method: sort()
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The sort() method (when applied to a JavaScript
array) sorts
elements of the array.
By default, it sorts
values as alphabetical strings in ascending order. This does not work well for
numbers
It
has the following syntax with the following parameters. It returns a new
array containing the selected elements.
array.sort(comparefunction)
|
Parameter
|
Required / Optional
|
Description
|
|
comparefunction
|
Optional
|
A function that defines
an alternative sort order, e.g. function(a,b){return
a - b} to sort in ascending numerical order or function(a,b){return b - a} to sort in descending
numerical order
|
EXAMPLE:
HTML USED IN THIS EXAMPLE:
<!DOCTYPE html>
<html> <!-- Copyright (c) Nematrian Limited 2018 -->
<head>
<style>
table,th,tr,td {border: 1px solid black; border-collapse: collapse;}
</style>
</head>
<body>
<table>
<tr>
<th>Example</th>
<th>Resulting value of <code>x</code></th>
</tr>
<tr>
<td><code id="Example"></code></td>
<td><code id="Result"></code></td>
</tr>
</table>
<script>
var h = ["a", "c", "b"];
document.getElementById("Example").innerHTML =
'var h = ["a", "c", "b"];<br>' +
'var x = h.sort();';
document.getElementById("Result").innerHTML = h.sort();
</script>
</body>
</html>
|
FUNCTION THAT MAY ASSIST IN TESTING WHETHER FEATURE IS SUPPORTED:
function isSupportedJavaScriptMethodArraySort() {
var h = [1, 2, 3]; return !!h.sort;
} |
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