SharePoint jQuery generic call to get rest data

Lately I've been working with SharePoint a lot and creating functions to read data from lists and manipulate / display it to the user.  Below are two generic JS / jQuery functions that I created to do this.

I've explained the parameters so hopefully you will find it useful.

// inListSiteURL is the base URL of the SharePoint site... such as https://somespsite.somedomain.com or https://somespsite.somedoamin.com/someSubSite
// inListTitle is the title of the SharePoint list
// inHaveResultsFunction is the function to call when data is found
// inNoResultsFunciton is the function to call when no data is found
// inFilter is the filter to use... maybe something like "?$select=Title,URL&$top=100&$filter=Editor/Id%20eq%20123&$orderby=Title asc"... you can leave this blank if you want
// inFinalFunction is the function to call after all results
function spGetListData(inListSiteURL, inListTitle, inHaveResultsFunction, inNoResultsFunction, inFilter, inFinalFunction)
{
    try {
        var callURL = inListSiteURL + "/_api/web/lists/GetByTitle('" + inListTitle + "')/items" + inFilter;
        spGetRestDataCall(callURL, inHaveResultsFunction, inNoResultsFunction, null, inFinalFunction);
    } catch(err) {
        
    }
} // function spGetListData


// this function is a 'generic' ajax call used by the other functions to simplify the code
// inURL is the URL to the SharePoint list to retrieve data from
// inSuccessFunction is the function to call when data is returned
// inNoResultFunction is the function to call when no data is returned
// inErrorFunction is the function to call when an error is encountered
// inFinalFunction is the function to call when after all the data is processed
function spGetRestDataCall(inURL, inSuccessFunction, inNoResultFunction, inErrorFunction, inFinalFunction)
{
    var spRestContentType = "application/json;odata=verbose"; // you should not have to change this
    $.ajax({
        url: inURL,
        method: "GET",
        processData: false,  
        contentType: spRestContentType,
        headers: { "Accept": spRestContentType },
        success: function (data) {
            try {
                if (data.d.results.length == 0) {
                    if (inNoResultFunction !== null) {
                        inNoResultFunction();
                    }
                } else {
                    $.each(data.d.results, function(index, item){
                        inSuccessFunction(index,item);
                    });
                    if (inFinalFunction !== null) {
                        inFinalFunction();
                    }
                }
            } catch(err) {
                inSuccessFunction(data.d);
            }
        },
        error: function (data) {
            //console.log(JSON.stringify(data));
            if (inErrorFunction !== null) {
                inErrorFunction(data);
            }
        }
    });
} // function spGetRestDataCall