I agreed. It was definitely one of the lectures that could be better invested doing something else like napping.
I am watching the courses even though I am in way over my head. I need to learn C first (don't know anything) ( see this thread https://forums.macrumors.com/threads/680658/ ), but I figure like learning a foreign language it doesn't hurt to watch even though I really have no idea wth they are talking about--it might sink in by osmosis.
I know C++ (I got a C in the class cause I was lazy and didn't do the homework most of the time, just took it last semester. Easy transition from Java, just had to learn keywords), Java (I got a 100 in the class but I took it my junior year in high school), HTML and taught myself some PHP. Anyone know that it'll be easy or hard for me?#import "PolygonShape.h"
@implementation PolygonShape
@synthesize numberOfSides, minimumNumberOfSides, maximumNumberOfSides, name;
- (void) setNumberOfSides:(int) numSides {
if (numSides > maximumNumberOfSides) {
NSLog(@"Invalid number of sides: %d is greater than the maximum of %d allowed",numSides, maximumNumberOfSides);
return;
}
if (numSides < minimumNumberOfSides) {
NSLog(@"Invalid number of sides: %d is less than the minimmum of %d allowed",numSides, minimumNumberOfSides);
return;
}
numberOfSides = numSides;
}
- (void) setMinimumNumberOfSides:(int) newMin {
if (newMin < 2) {
NSLog(@"Invalid number of minimum sides, %d is less than 2", newMin);
return;
}
minimumNumberOfSides = newMin;
}
- (void) setMaximumNumberOfSides:(int) newMax {
if (newMax > 12) {
NSLog(@"Invalid number of maximum sides, %d is more than 2", newMax);
return;
}
maximumNumberOfSides = newMax;
}
- (id) initWithNumberOfSides: (int) numSides minimumNumberOfSides:(int) minSides maximumNumberOfSides:(int) maxSides {
[self setMinimumNumberOfSides:minSides];
[self setMaximumNumberOfSides:maxSides];
[self setNumberOfSides:numSides];
NSLog([self description]);
return self;
};
- (id) init {
return self = [[PolygonShape alloc] initWithNumberOfSides:5 minimumNumberOfSides:3 maximumNumberOfSides:10];
};
- (NSString *) description {
float degAngle = (float) (180 * (float) (numberOfSides-2) / numberOfSides);
float radAngle = (float) degAngle/180 * M_PI;
NSArray *polyName = [NSArray arrayWithObjects: @"triangle", @"square", @"pentagon", @"hexagon", @"heptagon",
@"octagon" , @"enneagon", @"decagon", @"hendecagon", @"dodecagon", nil];
return [NSString stringWithFormat:@"Hello, I am a %d-sided polygon (aka a %@) with angles of %0.0f degrees (%f radians).",
numberOfSides, [polyName objectAtIndex: (numberOfSides-3)], degAngle, radAngle];
}
- (void) dealloc {
[super dealloc];
NSLog(@"A poly just died");
};
@end#import "Controller.h"
#import "PolygonShape.h"
@implementation Controller
- (void) updateInterface {
numberOfSidesLabel.text = [NSString stringWithFormat:@"%d",polygon.numberOfSides];
}
- (IBAction)decrease:(id)sender {
NSLog(@"decreasing");
--polygon.numberOfSides;
if (polygon.numberOfSides == polygon.minimumNumberOfSides) decreaseButton.enabled = NO;
increaseButton.enabled = YES;
[self updateInterface];
}
- (IBAction)increase:(id)sender {
NSLog(@"increasing");
++polygon.numberOfSides;
if (polygon.numberOfSides == polygon.maximumNumberOfSides) increaseButton.enabled = NO;
decreaseButton.enabled = YES;
[self updateInterface];
}
- (void) awakeFromNib {
polygon = [[PolygonShape alloc] initWithNumberOfSides:5 minimumNumberOfSides:3 maximumNumberOfSides:12];
NSLog(@"My polygon: %@", polygon);
[self updateInterface];
}
@end [polygon setNumberOfSides:polygon.numberOfSides[+-]1]@property (readonly) float angleInDegrees;
@property (readonly) float angleInRadians;Hi Steve,
1: Good one, dunno why I actually follow that through, mind must have been wandering off
2: The return statements in the ifs is a Perl habit I happen to have
Thanks for commenting, will update my class
if(condition == true)
DoSomething;if(condition == true)
{
DoSomething;
}void PrintIntrospectionInfo() {
NSMutableArray *myObjects;
myObjects = [[NSMutableArray alloc] init];
NSString *myString = @"bob";
NSMutableString *myMutableString = @"floyd";
NSURL *myURLs = [NSURL URLWithString:@"http://google.com.au"];
NSDictionary *myDictionary = [NSDictionary dictionaryWithObjectsAndKeys:@"happy", @"smile", @"sad", @"frown"];
NSString *myProcessName = [[NSProcessInfo processInfo] processName];
[myObjects addObject:myString]; //there has got to be a better way to do this
[myObjects addObject:myMutableString];
[myObjects addObject:myURLs];
[myObjects addObject:myDictionary];
[myObjects addObject:myProcessName];
for (id obj in myObjects) {
NSLog(@"Class Name: %@", [obj className]);
}
}void PrintPathInfo() {
NSString *path = @"~";
NSArray *array = [path pathComponents];
NSLog(@"%@",
[array componentsJoinedByString:@"/"]);
}- (NSString *)stringByExpandingTildeInPathNSString *path = @"~";
path = [path stringByExpandingTildeInPath];