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iOS Object-Oriented Objective-C Memory, Arrays and Loops, Oh My! Alloc and Init

Posted by wwyattw
wwyattw
10,389 Points

Create an NSMutableDictionary called 'carDict'. Allocate memory and initialize 'carDict' with the following key/value pa

Create an NSMutableDictionary called 'carDict'. Allocate memory and initialize 'carDict' with the following key/value pairs: "Make":"Honda", "Model":"Accord". Do this all in one line of code.

I am confused with this one.

NSMutableDictionary * carDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Make", @"Honda",@"Model",@"Acoord", nil];

it runs fine with Xcode.

variable_assignment.mm 
NSMutableDictionary * carDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Make", @"Honda",@"Model",@"Acoord",nil];

2 Answers

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

So close. You just have the keys and values reversed:

NSMutableDictionary * carDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"Honda", @"Make",@"Accord",@"Model",nil];
wwyattw
wwyattw
10,389 Points

Oops, thank you so much

David Adams
PLUS
David Adams
Courses Plus Student 555 Points
David Adams
David Adams
Courses Plus Student 555 Points

Can also use NSMutableDictionary *carDict2 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"Honda", @"Make", @"Accord", @"Model", nil];