I was wondering how do I get sort through an do something different based on every "tenth" item in an array. I don't know much but I think it would kind of go like this...
for (NSDictionary *object in array) {
if (0==(object % 10)) {
//DO SOMETHING
}
}
But this is obviously pseudo code that doesn't work. Can any one help me out with this?
Try this.
for (NSInteger i = 0 ; i < array.count ; i++)
{
if(i%10 == 0)
{
// Do Something
}
}
or
for (NSDictionary *object in array)
{
NSInteger index = [array indexOfObject:object];
if(index%10 == 0)
{
// Do Something
}
}
Added
Assume that the array is NSArray
.
NSArray *array;
NSMutableArray *tempArray = [NSMutableArray array];
for (NSInteger i = 0 ; i < array.count ; i++)
{
if(i%10 == 0)
{
[tempArray addObject:/*some object*/];
}
[tempArray addObject:[array objectAtIndex:i]];
}
array = [NSArray arrayWithArray:tempArray];
if array was like below and add A
at every 10th.
|0|1|2|3|4|5|6|7|8|9|10|11|12|13|14|15|16|17|18|19|20|....
// 9 is the first 10th
// 19 is the second 10th
will be
|0|1|2|3|4|5|6|7|8|a|9|10|11|12|13|14|15|16|17||18|a|19....
Added
as rmaddy commented, to insert object, don't need to iterate all objects.
for (NSInteger i = 0 ; i < array.count ; i+=10)
You can use this. However you can just insert objects at index.
NSMutableArray *array; // this is the original array;
NSArray *objects; // this is the objects to insert array;
for(NSInteger i = 0 ; i < objects.count ; i++)
{
[array insertObject:objects[i] atIndex:9+(i*11)];
}