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iOS Object-Oriented Objective-C Memory, Arrays and Loops, Oh My! Review Dictionaries and Arrays

Posted by Carl Smith
Carl Smith
8,185 Points

I am not sure how add an array and pair the keys with the values in an NSMutableDictionary.

I've looked at the apple developer docs and stackoverflow with no luck. I've seen some things that say to use a for in loops and others that are different. I get what I'm supposed to do, I just can't figure out the syntax for it. Any help would be greatly appreciated.

variable_assignment.mm 
NSArray *shoeOrder = @[@"Charles Smith", @(9.5), @"loafer", @"brown"];

NSMutableDictionary *shoeOrderDict = [[NSMutableDictionary alloc]init;

1 Answer

Oliver Duncan
Oliver Duncan
16,642 Points
Oliver Duncan
Oliver Duncan
16,642 Points

I don't think they're necessarily looking for you to do it programatically. This worked for me:

NSArray *shoeOrder = @[@"Charles Smith", @(9.5), @"loafer", @"brown"];
NSMutableDictionary *shoeOrderDict = [[NSMutableDictionary alloc]init];

shoeOrderDict[@"customer"] = [shoeOrder objectAtIndex: 0];
shoeOrderDict[@"size"] = [shoeOrder objectAtIndex: 1];
shoeOrderDict[@"style"] = [shoeOrder objectAtIndex: 2];
shoeOrderDict[@"color"] = [shoeOrder objectAtIndex: 3];

Also you were missing a closing bracket after your init call? Hope this helps.

Carl Smith
Carl Smith
8,185 Points

Thank you, I was overthinking this tooo much.