Question

I have an existing array to which i want to add an other array in the front of the existing array.

Add to the end is no problem with

[existingArray addObjectsFromArray:newArray];

But how to add it to the front?

Answer 1

You can do this without a temporary array, and without assuming that newArray is an NSMutableArray, and without making an NSIndexSet:

[existingArray replaceObjectsInRange:NSMakeRange(0,0)
                withObjectsFromArray:newArray];