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- NSMutableArray* names = [NSMutableArray arrayWithObjects:@"Andy", @"Bart", @"Bob", nil];
- NSPredicate* predicate = [NSPredicate predicateWithFormat:@"SELF beginswith[c] 'b'"];
- NSArray* namesStartingWithB = [names filteredArrayUsingPredicate: predicate];
- [picker reloadAllComponents];
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