Duh-mac the new cloud computing service from Apple.

MobileMe sync failed today. I’m sure you’ll want to know why, well the reason was because there was an error. Phew I’m glad we got that one sorted.

Now that Cocoa as garbage collection there if a real advantage to using it to allocate buffer. Where before I would have just made a quick malloc statement to get some dynamic memory:

// buffer/dynamic array that holds with 10 doubles
double *x;
x = (double*) malloc(sizeof(double) * 10);
//... sometime later ...
free(x);


Now I find myself doing,

double *x = [[NSMutableData dataWithCapacity:sizeof(double) * 10] mutableBytes];
NSMutableData *buffer = [NSMutableData dataWithCapacity:sizeof(double) * 10];
double *x = [buffer mutableBytes];


Garbage collected buffers; for the lazy at heart.

Tip of the hat to Infurious Blog for pointing out one possible meaning of this error; a missing @end in an Objective-C class header file.

Another possibility for this (this took me an hour to find!) is that you have a curly bracket somewhere in you header file. For example, from cut and pasting your method definition from the implementation file into your header file.

Print a graph from an X Y1 Y2 formatted data file straight from the command line using:

gracebat -nxy datafile.dat