Question

I am trying to create a String from Array.But, there is condition to how it should be generated, as explained below.

NSArray *array=[NSArray arrayWithObjects:@"Hello",@"World",nil];
[array componentsJoinedByString:@","];

This will output: Hello,World.

But, if first Item is Empty,then is there way to receive the only second one.

1. Hello , @”” => Hello
2. @”” , World => World
3. Hello , World => Hello,World

Answer 1

Another way to do this is to grab a mutable copy of the array and just remove non valid objects. Something like this perhaps:

NSMutableArray *array = [[NSArray arrayWithObjects:@"",@"World",nil] mutableCopy];
[array removeObject:@""]; // Remove empty strings
[array removeObject:[NSNull null]]; // Or nulls maybe

NSLog(@"%@", [array componentsJoinedByString:@","]);