Altura dinámica de Divs

$(window).on('load',function(){
    var childHeight = [];
    if($(window).width() > 640) {
        $('.news-gallery').find('article').each(function() {
            childHeight.push($(this).outerHeight());
            console.log(childHeight);
            newChildHeight = Math.max.apply(Math, childHeight);
            $('article').css('height', parseInt(newChildHeight)+'px');
        });
    }
    else{
        $('.news-gallery').attr('style', ' '); }
});