Tutorials For a Beginner

Hello everyone. Where might a good place for me to find video tutorials while Apple's developer site is down for maintenance?

 

 

Thanks,

Lactem

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Custom storage strategies in Obj -C for beginner.

Hi, I'm just starting out with obj-c and I've got an idea for a project that requires a fairly odd storage structure and I'd like advice on how to implement it.  The real question Is this an object I should be creating with malloc/free and pointers or is it doable with object oriented storage facilities like NSArray and Hashtables?  Also, ideas about how to actually do it are welcome.

 

I guess this would be the model for the program.  Here's what it needs to do:

 

• Store many 2D segment objects (X1,Y1,X2,Y2)
• Each segment has one associated integer property.  (think brightness?)
• No two segments can have the same 4 coordinates.
• have a method to quickly look up all the segments that have the same X1,Y1.
• have a method to quickly look up all the segments that have the same X1.
• have a method to quickly look up all the segments that have the same X2,Y2.
• have a method to return all  segments.
• In practice there can be hundreds or possibly a thousand segments.
• The size of the space/canvas or whatever needs to be resizable. (Meaning a 1D array representing a n-D array might be inefficient)
• Maximally the dimensions of the canvas will be 128x512.  This would be a very extreme case.

 

I've done this in the past and I've used a 2D array representing the X1,Y1 space and then filled cell in that 2D array with a hashtable full of X2,Y2,Value objects. This has been passable but leaves much to be desired.  Also, There's no 2D array in obj-c.

 

Thanks for your time,

-Matt

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