I'd like to see if I can somehow make this loop more effective (smaller?). I'm using MultiDatesPicker to make a reservation plugin. And I've set everything right, and everything works, but I'd like to see if my jquery code can be optimized somehow.HTML looks like this (minus the actual calendar):<div class=reservation_field_left>    <label>Reservation Date:</label>    <input type=hidden id=disabled_dates value=27.11.2015, 28.11.2015>    <input type=text name=reservation_date id=reservation_dates_input value=14.11.2015, 15.11.2015, 25.11.2015>    <div id=reservation class=hasDatepicker></div></div>I have inputs where I have dates that have been reserved #disabled_dates, and in my #reservation_date is the date of the current reservation. Now this input, if you're creating a new reservation, is empty, which means if I don't make the check if it's empty, I'll get an error in my date picker plugin (if the option for it is included). There are double quotes in the #disabled_dates because that's how I get my output from php but the code below deals with that, so that's not an issue at all.I'm just wondering if this big if - else if - else chunk can be reduced somehow.jQuery(document).ready(function($) {    use strict;    var disabled_dates = $('#disabled_dates').val(),        reservation_dates_input = $('#reservation_dates_input').val(),        disabled_dates_array,        reserved_dates_array,        options;    if (disabled_dates.length) {        var clean_disabled_dates = disabled_dates.replace(/\/g, '');            disabled_dates_array = clean_disabled_dates.split(, );    }    if (reservation_dates_input.length) {        var clean_reserved_dates = reservation_dates_input.replace(/\/g, '');            reserved_dates_array = clean_reserved_dates.split(, );    }    if (disabled_dates.length>2 && reservation_dates_input.length>2) {        options = {            firstDay: 1,            dateFormat: dd.mm.yy,            altField: '#reservation_dates_input',            addDisabledDates: disabled_dates_array,            addDates: reserved_dates_array        };    } else if(disabled_dates.length>2 && reservation_dates_input.length<=2) {        options = {            firstDay: 1,            dateFormat: dd.mm.yy,            altField: '#reservation_dates_input',            addDisabledDates: disabled_dates_array,        };    } else if(reservation_dates_input.length>2 && disabled_dates.length<=2) {        options = {            firstDay: 1,            dateFormat: dd.mm.yy,            altField: '#reservation_dates_input',            addDates: reserved_dates_array        };    } else {        options = {            firstDay: 1,            dateFormat: dd.mm.yy,            altField: '#reservation_dates_input',        };    }    $('#reservation').multiDatesPicker(options);});I tried putting empty arrays in the disabled_dates_array and reserved_dates_array, but MultiDatesPicker doesn't allow empty arrays, or arrays with no date in it. 
Configuring a date picker with support for disabled dates
javascript;jquery;datetime;form
You don't need to build the options object in one go instead create what all cases need and then optionally add:options = {    firstDay: 1,    dateFormat: dd.mm.yy,    altField: '#reservation_dates_input',};if (disabled_dates.length>2) {    options.addDisabledDates = disabled_dates_array;}if (reservation_dates_input.length>2) {    options.addDates = reserved_dates_array;}you also have some code duplication when creating the arrays, you can put that in a function and call it twice:function createArrayFromInput(dates_input){    if (dates_input.length) {        var clean_dates = dates_input.replace(/\/g, '');        return clean_dates.split(, );    }    return [];}