[jQuery] We have filter, why not unfilter?

[jQuery] We have filter, why not unfilter?

For example, you may want to get the number of items in a list and
hide them all (except the first one). Normally, you would do:
itemcount = $("ul#mylist li").size();
$("ul#mylist li").hide().filter(":eq(0)").show();
The 'unfilter way':
itemcount = $("ul#mylist li").hide().filter(":eq(0)").show().unfilter().size();
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