columns.js

require(['gitbook', 'jquery'], (gitbook, $) => {
    if (location.pathname == "/") {
        // get the number of rows we'll need
        var panels = $('div.search-noresults').find('div.panel.panel-default');

        var splat_panels = [];
        for (;panels.length>0;) {
            splat_panels.push(panels.splice(0, 2));
        }

        // add the required number of rows
        for (var i = 0; i < splat_panels.length; i++) {
            var cols = [];
            if (splat_panels[i].length == 2) {
                cols = [
                    $('<div class="col-md-6"></div>').append(
                        splat_panels[i][0]
                    ),
                    $('<div class="col-md-6"></div>').append(
                        splat_panels[i][1]
                    )
                ];
            } else {
                cols = [
                    $('<div class="col-md-12"></div>').append(
                        splat_panels[i][0]
                    )
                ]
            }

            $('div.search-noresults').prepend(
                $('<div class="row"></div>').append(
                    cols
                )
            );
        }
    }
});