cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   dnsolo
   Member

   Hi all,

   I'm trying to search for a given integer inside an NSMutableArray (that contains random integers).

   Can someone help?

   Thanks

   Posted 2 years ago #
2. 

   iphonemobdev
   Member

   Hi,

   You can add object into NSMutableArray like [array addObject:[NSNumber numberWithInt:<#(int)value#>]];

   put random function on (int)value.

   Hope it helps.

   Posted 2 years ago #
3. 

   pabloruiz55
   Member

   @iphonemobdev:i think he is asking how to search for a value inside an array, not how to insert one...

   I don't know if there is a direct way, but i think you can do that like you would with a normal array.

   in c:
   

   int positioninarray =-1;
   for(i=0;i<sizeofthearray;i++)
   {
      if(array[i] == searchedvalue)
      {
        positioninarray = i;
      }
   }
   if(positioninarray == -1)
      //Didn't find the position of the searched value
   else
   {
     //do whatever you want with that...
   }

   Posted 2 years ago #
4. 

   dnsolo
   Member

   Thanks, I'll try that.

   Posted 2 years ago #
5. 

   Codemattic
   Moderator

   @dnsolo, also:

   indexOfObject:
   Returns the lowest index whose corresponding array value is equal to a given object.

   - (NSUInteger)indexOfObject:(id)anObject

   Return Value
   The lowest index whose corresponding array value is equal to anObject. If none of the objects in the receiver is equal to anObject, returns NSNotFound.

   Discussion
   Objects are considered equal if isEqual: returns YES.

   Posted 2 years ago #
6. 

   dnsolo
   Member

   Thanks Codemattic, that's exactly what I need.

   Posted 2 years ago #
7. 

   jd
   Member

   Does that work on int's though?

   If not, add break; after positioninarray = i; in pablo's code. You don't need to keep searching once you find it.

   Posted 2 years ago #
8. 

   Codemattic
   Moderator

   @jd, it should work for comparing NSNumbers bc:

   "Objects are considered equal if isEqual: returns YES."

   Posted 2 years ago #
9. 

   zszen
   Member

   try this:

   +(int)findArrayValue:(NSArray*)array number:(int)num{
   for(i=0;i<[array count];i++){
   if([[array objectAtIndex:i]intValue] == num){
   return i
   }
   }
   return -1;
   }

   +(int)findArrayValue:(NSArray*)array string:(NSString*)str{
   for(i=0;i<[array count];i++){
   if([[array objectAtIndex:i]stringValue] == str){
   return i
   }
   }
   return -1;
   }

   Posted 5 months ago #

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