You'll want to use JavaScript's Array splice method:
var tag_story = [1,3,56,6,8,90],
id_tag = 90,
position = tag_story.indexOf(id_tag);
if ( ~position ) tag_story.splice(position, 1);
P.S. For an explanation of that cool ~
tilde shortcut, see this post:
Using a ~ tilde with indexOf to check for the existence of an item in an array.
Note: IE < 9 does not support .indexOf()
on arrays. If you want to make sure your code works in IE, you should use jQuery's $.inArray()
:
var tag_story = [1,3,56,6,8,90],
id_tag = 90,
position = $.inArray(id_tag, tag_story);
if ( ~position ) tag_story.splice(position, 1);
If you want to support IE < 9 but don't already have jQuery on the page, there's no need to use it just for $.inArray
. You can use this polyfill instead.