how to add parameters in a javascript object (DataTables)?

Question

I want to build a DataTable with the following parameters.

var table3 = $('#msg').dataTable({
    "scrollY":          calcDataTableHeight(),
    "scrollCollapse":   true,
    "paging":           false,
    "bInfo":            false,
    "order":            [[0, "desc"]],
    "dom": "Tfrtip",
    "ajax": {
        "url": "includes/DataTables-1.10.4/extensions/Editor-1.3.3/php/table.msg.php",
        "data": function (d){
            d.cat = cat;
        },
        "type": "POST"
    }
});

Some Parameters depend on Variables. So if needed I want to add these to the object.

if (buttons == true) {
add this to table 3
        "tableTools": {
        "sRowSelect": "os",
        "aButtons": [
            { "sExtends": "editor_create", "editor": editor },
            { "sExtends": "editor_edit",   "editor": editor },
            { "sExtends": "editor_remove", "editor": editor }
        ]
    }

How can I do this? I tried a lot, but nothing works.

Answer 1

Build your options as an object and then pass it to DataTables after you're done.

For example:

 var options = {
    "scrollY":          calcDataTableHeight(),
    "scrollCollapse":   true,
    "paging":           false,
    "bInfo":            false,
    "order":            [[0, "desc"]],
    "dom": "Tfrtip",
    "ajax": {
        "url": "includes/DataTables-1.10.4/extensions/Editor-1.3.3/php/table.msg.php",
        "data": function (d){
            d.cat = cat;
        },
        "type": "POST"
    }
};

if (buttons == true) {
   options['tableTools'] = {
      "sRowSelect": "os",
      "aButtons": [
         { "sExtends": "editor_create", "editor": editor },
         { "sExtends": "editor_edit",   "editor": editor }
      ]
   };

   if (showRemoveBtn) {
      options['tableTools']['aButtons'].push(
         { "sExtends": "editor_remove", "editor": editor }
      );
   }
}

var table3 = $('#msg').dataTable(options);

It could also be done with $.extend, if you want.