javascript - How to hide element using "this"? -

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pardon stupidity can please explain me how can hide element using this keyword? example working:

jquery(document).ready(function($){     if($('.someclass').length==1){         $('.someclass').hide();     }   });

but no go me:

jquery(document).ready(function($){     if($('.someclass').length==1){         $(this).hide();     }   });

thank you!

do need use this (in case, see other answers) or seek avoid selector duplication? this?

jquery(document).ready(function($){   var elem = $('.someclass');   if(elem.length == 1){     elem.hide();   }   });

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