James (MrGeckosMedia.com), joined by, Eduardo (MegaEduX.com), and Karl, teaches how loops, arguments, and goto works in Cocoa.

15:35

Example code from episode.

Loops Example

#import

int main (int argc, const char * argv[]) {

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

int i=0;

while (i!=2) {

NSLog(@"%d", i);

i++;

}

i=0;

do {

NSLog(@"%d", i);

i++;

} while (i!=3);

NSArray *anArray = [NSArray arrayWithObjects:@"Apples", @"Oranges", @"Grapes", @"Bananas", nil];

for (int d=0; d<[anArray count]; d++) {

NSLog(@"%@", [anArray objectAtIndex:d]);

}

NSString *theObject;

for (theObject in anArray) {

NSLog(@"For In: %@", theObject);

}

NSEnumerator *theEnumerator = [anArray objectEnumerator];

while (theObject = [theEnumerator nextObject]) {

NSLog(@"Enumerator: %@", theObject);

}

[pool drain];

return 0;

}

Goto Example

#import

void testGoto() {

NSString *theString = [NSString new];

if (1==12) {

goto Error;

}

goto Cleanup;

Error:

NSLog(@"An error occurred");

goto Cleanup;

Cleanup:

NSLog(@"Releasing the string");

[theString release];

}

int main (int argc, const char * argv[]) {

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

testGoto();

[pool drain];

return 0;

}

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