Customize jquery datatables with coffeescript. csv export filename with date.

computers.coffee

ready = ->
  table = $('#computers').dataTable({
        "dom": "<'row'<'col-md-6'l><'col-md-6'Bf>><'row'<'col-md-6'><'col-md-6'>><'row'<'col-md-12't>><'row'<'col-md-12'ip>>",
        "buttons": [
            extend: 'csv',
            text: '<strong>CSV</strong> file download',
            filename: getfilename,
            exportOptions: {
              columns: [ 0, 1, 2, 3, 4, 6, 7, 8, 9, 10, 11 ]
            }
        ],
        "lengthMenu": [[10, 25, 50, 100, -1],[10, 25, 50, 100, "All"]]
       });
$(document).on('turbolinks:load', ready);

getfilename = ->
  date = new Date
  localdate = new Date(date - (date.getTimezoneOffset() * 60 * 1000))
  'computers' + localdate.toISOString().replace /\..+$|[^\d]/g, ''