Question

I’m making a code which shows the names of people on a list.

The list is different for each date, so my problem is when there is only like 1 or no people signed and I make an array with index beyond the limit of people, it crashed. I know that this happens because the array is empty, but how do I make the code ignore empty arrays?

I have tried to make an “if” that count the number of arrays and then decide to post the array or just post no name. But it doesn’t work like this, I still get the out of bounds exception.

How should I manage empty arrays?

My code:

NSString *html = [request2 responseString];
NSMutableArray *arr2 = [html componentsSeparatedByString:@"vagter"];
NSString *html1 = [arr2 objectAtIndex:1];

//name1
NSMutableArray *arr3 = [html1 componentsSeparatedByString:@"<td><font color=#ffffff>"];
NSString *html2 = [arr3 objectAtIndex:1];
NSMutableArray *arr4 = [html2 componentsSeparatedByString:@"</font></td>"];
NSString *html3 = [arr4 objectAtIndex:0];

_name.text = html3;

//name 2
NSMutableArray *arr5 = [html1 componentsSeparatedByString:@"<td><font color=#ffffff>"];

if ([arr5 count] > 4) {
    NSString *html4 = [arr5 objectAtIndex:5];
    NSMutableArray *arr6 = [html4 componentsSeparatedByString:@"</font></td>"];
    NSString *html5 = [arr6 objectAtIndex:0];

    _name.text = html5;
}
else
{
    _name1.text = @"No name";
}

Answer 1

It should be:

if ([arr5 count] > 5) {

    NSString *html4 = [arr5 objectAtIndex:5];
    ...

Indeed, index 5 will correspond to the sixth array item, so you have to have at least 6 objects in it.

Use the same pattern, if you want to check for the array bounds, in all cases.