Bug Tracker

#11541 closed bug (invalid)

Opened April 01, 2012 06:18AM UTC

Closed April 01, 2012 01:04PM UTC

.unique() method, Can not remove duplicates in Google Chrome

Reported by: deg84 Owned by:
Priority: low Milestone: None
Component: misc Version: 1.7.2
Keywords: Cc:
Blocked by: Blocking:
Description

Confirm the phenomenon in Gogole Chrome 18.0.1025.142 beta

Example 1:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<body>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">
var a = [1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2];
$.unique(a);
console.log(a);
</script>
</body>
</html>

Result:

[1,2,1]

But I hope Result:

[1,2]

or

[2,1]

Example2:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<body>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">
var a = ['2012-02-01','2012-02-01','2012-02-01','2012-02-01','2012-02-01','2012-02-01','2012-02-01','2012-02-01','2012-02-01','2012-02-01','2012-02-01','2012-02-01','2012-02-02','2012-02-02','2012-02-02','2012-02-02','2012-02-02','2012-02-02','2012-02-02','2012-02-02','2012-02-02',];
$.unique(a);
console.log(a);
</script>
</body>
</html>

Result:

["2012-02-01", "2012-02-02", "2012-02-01"]

But I hope Result:

["2012-02-01", "2012-02-01"]

or

["2012-02-02", "2012-02-01"]
Attachments (0)
Change History (1)

Changed April 01, 2012 01:04PM UTC by sindresorhus comment:1

component: unfiled → misc
priority: undecided → low
resolution: → invalid
status: new → closed

From the docs:

The $.unique() function searches through an array of objects, sorting the array, and removing any duplicate nodes. This function only works on plain JavaScript arrays of DOM elements, and is chiefly used internally by jQuery.

The method only accepts an array of DOM elements, not strings or numbers.