Question

Basically I need a function which counts the amount of different values in an array and one other function to give me the actual count of each different value in my array.

I have an Array which contains a changing amount of values:

Array = (This, This, This, This, Is, Is, Is, Is, Is, It, It, It, It)

I want to make a list view, each section should contain the different categories like:

This
- Element 1
- Element 2
- ...
Is
- Element 1
- ...
It
- Element 1
- ...

So I need the number 3 for my number of sections and the number of child-elements for each section.

How can I achieve that? Is there a better way than a for-statement with counting indexes for each section?

Thank you!

Answer 1

Add each array element to an NSCountedSet. Then the count of the set is the number of distinct objects you added, and you can use countForObject: to ask the set how many there are of each distinct object.