AS3: Join array and save to textfile is creating blank entries

Question

I'm having a hard time trying to get my array to save correctly into a textfile. The text file is formatted in a one-entry-per-line fashion thus I use this:

var newFavString:String = arFavourites.join("\r\n");

    favStream.open(favFile, FileMode.WRITE);
    favStream.writeUTFBytes(newFavString);
    favStream.close();

But somewhere, somehow it's adding blank lines which may be caused by spaces within some of the array entries but that shouldn't affect the joining process I don't think.

I used this to clean up the arrays just in case and it still shows some undefined objects in the trace:

for (i=0; i<arFavourites.length-1; i++) {
        if (arFavourites[i] == undefined) {
        arFavourites.splice(i,1);
        }
        trace(arFavourites[i]);
    }

And this is how I am importing the data into the array:

var favFile:File = File.userDirectory;
favFile = favFile.resolvePath("favourites.txt");
var favStream:FileStream = new FileStream();

var arFavourites = new Array();
var FavCount:int = 0;

favStream.open(favFile, FileMode.READ);
var fileContents:String = favStream.readUTFBytes(favStream.bytesAvailable);


    arFavourites = fileContents.split("\r\n");

    for (i=0; i<arFavourites.length-1; i++) {
        if (arFavourites[i] == undefined) {
        arFavourites.splice(i,1);
        }
    }

favStream.close();

When I remove something, I search for it in the arrays and splice it out. Maybe the error is there.

var k:int;
    var i:int;
    trace("Selected Index: " + dg.selectedIndex);
    if (dg.length == 0) {
        return;
    }
    for (k=0; k<dg.length; k++) {
        if (dg.isItemSelected(dg.getItemAt(k))) {
            for (i=0; i<arFavourites.length; i++) {
                if (arFavourites[i] == dg.getItemAt(k)[1]) {
                    arFavourites.splice(i,1);
                    }
                if (arFavourites[i] == dg.getItemAt(k)[2]) {
                    arFavourites.splice(i,1);
                    }
                if (arFavourites[i] == dg.getItemAt(k)[3]) {
                    arFavourites.splice(i,1);
                    }
                if (arFavourites[i] == dg.getItemAt(k)[4]) {
                    arFavourites.splice(i,1);
                    }
                if (arFavourites[i] == dg.getItemAt(k)[5]) {
                    arFavourites.splice(i,1);
                    }
            }
            dg.removeItemAt(k);
            dg.scrollToIndex(k);
            dg.clearSelection();
            break;
        }
    }
    for (i=0; i<arFavourites.length-1; i++) {
        if (arFavourites[i] == undefined) {
        arFavourites.splice(i,1);
        }
    }
    var newFavString:String = arFavourites.join("\r\n");
    trace(newFavString);

    favStream.open(favFile, FileMode.WRITE);
    favStream.writeUTFBytes(newFavString);
    favStream.close();

When something is added or removed from the array, the text file is updated. I'm sure its something really simple and I would greatly appreciate a speedy response =) Thanks

Answer 1

Ok so I finally figured out a working solution. By getting the selectedIndex I could figure out which array element matched the dataGrid line and then splice it out.

Selected Index:

arFavourites.splice(dg.selectedIndex*5,5);

Remove row from DataGrid:

for (k=0; k<dg.length; k++) {
        trace(dg.length);
        if (dg.isItemSelected(dg.getItemAt(k))) {
            dg.removeItemAt(k);
            dg.scrollToIndex(k);
            dg.clearSelection();
        }}

ReWrite text file:

var newFavString:String = arFavourites.join("\r\n");
    trace(newFavString);
    favStream.open(favFile, FileMode.WRITE);
    favStream.writeUTFBytes(newFavString);
    favStream.close();