Re: Finding object array index when iterating through array
Re: Finding object array index when iterating through array
- Subject: Re: Finding object array index when iterating through array
- From: Greg Parker <email@hidden>
- Date: Wed, 07 Mar 2012 18:39:20 -0800
On Mar 6, 2012, at 6:19 PM, Marco Tabini <email@hidden> wrote:
>> I have an array and I am iterating through it using this technique:
>>
>>> for (id object in array) {
>>> // do something with object
>>> }
>>
>> Is there way to obtain the object's current array index position or do I have to add a counter?
>
> [array indexOfObject:object] should do the trick, though, if you need to do it at every iteration, keeping a counter may be better.
Note that -indexOfObject: returns an object from the array that is -isEqual: to the parameter. This might not be the same object that you are looking at.
-indexOfObjectIdenticalTo: would solve the -isEqual: problem, but would still return the wrong index if the same object were in the array twice.
You should add a counter to your for..in loop, or use a traditional counted for loop and -objectAtIndex:.
--
Greg Parker email@hidden Runtime Wrangler
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