Append an object in an array

Question

I want to append an object in an array.

For example,

 NSMutableArray *array = [[NSMutableArray alloc]init];
    for (int i=0; i<5; i++)
    {
        [array addObject:@[@"Any"]];
    }

It gives an output like this:

array: (
        (
        Any
    ),
        (
        Any
    ),
        (
        Any
    ),
        (
        Any
    ),
        (
        Any
    )
)

Now I want to append object at index 3 of an array so that it could appear like below:

array: (
            (
            Any
        ),
            (
            Any
        ),
            (
            Any
        ),
            (
            Any, Where, How, When
        ),
            (
            Any
        )
    )

It is index 2, not index 3.

nicael
– nicael

2014-04-25 14:08:43 +00:00
Commented Apr 25, 2014 at 14:08 — nicael
– nicael, Commented Apr 25, 2014 at 14:08

Apurv · Accepted Answer · 2014-04-25 14:05:16Z

1

Use function insertObjectAtIndex to achieve it.

[array insertObject:anObject atIndex:2];

answered Apr 25, 2014 at 14:05

Apurv

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1 Comment

Mughees Musaddiq Over a year ago

This gives an output like this: array: ((Any),(Any),(Any),(Any),Where, How, When,(Any)). However, I want Where, How, When, inside the braces with Any like: (Any, Where, How, When )

nicael · Accepted Answer · 2014-04-25 14:29:47Z

1

If I understand you...

[array replaceObjectAtIndex:2 withObject:@[[[array objectAtIndex:2] firstObject],@"Where",@"How",@"When"]];

edited Apr 25, 2014 at 14:29

answered Apr 25, 2014 at 14:06

nicael

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2 Comments

Desdenova Over a year ago

Are you sure that you typed correctly? This does exactly what you asked for.

nicael Over a year ago

@Desdenova Not exactly, to be honest ))) but I edited

Lebyrt · Accepted Answer · 2014-04-25 14:16:56Z

0

Try this:

NSMutableArray *array = [NSMutableArray new];
for (int i=0; i<5; i++)
{
    [array addObject:[NSMutableArray arrayWithObject:@"Any"]];
}
NSLog(@"%@", array);

NSMutableArray *subArray = [array objectAtIndex:3];
[subArray addObjectsFromArray:@[@"Where", @"How", @"When"]];
NSLog(@"%@", array);

Note, @[] creates an instance of NSArray class which cannot be modified later. You can modify only instances of NSMutableArray class.

answered Apr 25, 2014 at 14:16

Lebyrt

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