Replace object in Array

Question

I try to replace a object in a NSMutableArray. To figure out, what the index number is, I use following code:

 NSUInteger index = [self.nameArray indexOfObject:[NSString stringWithFormat:@"James"]];

Now I try to replace it:

self.nameArray = [[NSMutableArray alloc] replaceObjectAtIndex:index withObject:@"Johanna"];

But even I want to start the app, I will become an error: Assigning to 'NSMutableArray *' from incompatible type 'void'

user3182143 · Accepted Answer · 2015-06-06 09:32:27Z

2

Below code is helpful for you.

[self.nameArray replaceObjectAtIndex:index withObject:@"Johanna"];

answered Jun 6, 2015 at 9:32

user3182143

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Comments

rob mayoff · Accepted Answer · 2015-06-06 09:17:00Z

1

I think this is what you want to do:

[self.nameArray replaceObjectAtIndex:index withObject:@"Johanna"];

answered Jun 6, 2015 at 9:17

rob mayoff

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1 Comment

Victor Jalencas Over a year ago

The answer is correct but you don't explain why his approach was wrong. I thing it would be more educational if you explained what he was doing incorrectly.

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