How do I run a jQuery if statement on a function paremeter?

I'm trying to avoid excessive code by simplifying my Slick Slider script. I'm trying to run a function that sets a boolean parameter but I'm obviously missing something here. Can anyone help me pinpoint what I'm doing wrong?

Thanks!

$( window ).load(function() {
 var galleryStyle = true;
 var $gallerySlider = $("div.content-gallery-wrapper .content-gallery"),function(){
   if ( $gallerySlider.hasClass("casestudy") ) {
    var galleryStyle = false;
   } else {}
 };

 $gallerySlider.each(function(){
   $(this).slick({
      centerMode: true,
      centerPadding: '0',
      slidesToShow: 1,
      slidesToScroll: 1,
      // dots: true,
      prevArrow: '.arrow.left',
      nextArrow: '.arrow.right',
      fade: galleryStyle
    });
 });

 $('.loading').removeClass('loading');
});