jquery - Hiding all li items except one -

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this question has answer here:

how hide li items except one?? hide element s of li excepting particular li item

will work??

        $(".divmenu").find('li').css("display", "none");         $(".divmenu").find('li nth-child(4)').css("color", "red");

or this??

       $(".divmenu").find('li:not(nth-child(4))').css("display", "none");

this 1 seems simple not working ..might wrong syntax?? please provide simple , efficient techniques

$(".divmenu").not(":nth-child(4)").css("display", "none");

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