akio0911

#import <Foundation/Foundation.h>

int main() {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    NSMutableArray *myMutableArray = [NSMutableArray array];
    [myMutableArray insertObject:[NSString stringWithString:@"1"]
                         atIndex:[myMutableArray count]];
    [myMutableArray insertObject:[NSString stringWithString:@"2"]
                         atIndex:[myMutableArray count]];

akio0911

#import <Foundation/Foundation.h>

int main() {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    NSMutableArray *myMutableArray = [NSMutableArray array];
    [myMutableArray insertObject:[NSString stringWithString:@"1"]
                         atIndex:[myMutableArray count]];
    [myMutableArray insertObject:[NSString stringWithString:@"2"]
                         atIndex:[myMutableArray count]];

akio0911

#import <Foundation/Foundation.h>

int main() {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    NSMutableArray *myMutableArray = [NSMutableArray array];
    [myMutableArray insertObject:[NSString stringWithString:@"1"]
                         atIndex:[myMutableArray count]];
    [myMutableArray insertObject:[NSString stringWithString:@"2"]
                         atIndex:[myMutableArray count]];

akio0911

#import <Foundation/Foundation.h>

int main() {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    NSMutableArray *myMutableArray = [NSMutableArray array];
    [myMutableArray insertObject:[NSString stringWithString:@"1"]
                         atIndex:[myMutableArray count]];
    [myMutableArray insertObject:[NSString stringWithString:@"2"]
                         atIndex:[myMutableArray count]];

akio0911

#import <Foundation/Foundation.h>

int main() {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    NSMutableArray *array = [NSMutableArray array];
    NSLog(@"%@", array);
    [array addObject:[NSString stringWithString:@"blackColor"]];
    NSLog(@"%@", array);
    [array insertObject:[NSString stringWithString:@"redColor"] atIndex:0];

akio0911

#import <Foundation/Foundation.h>

int main() {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    NSMutableArray *anArray = [NSMutableArray array];
    [anArray addObject:[NSString stringWithString:@"red"]];
    id anObject = [anArray objectAtIndex:0];
    [anArray removeObjectAtIndex:0];
    [anObject someMessage]; // crash !!!

akio0911

#import <Foundation/Foundation.h>

int main() {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    NSMutableArray *anArray = [NSMutableArray array];
    [anArray addObject:[NSString stringWithString:@"red"]];
    id anObject = [[anArray objectAtIndex:0] retain];
    [anArray removeObjectAtIndex:0];
    NSLog(@"%@", anObject);

akio0911

#import <Foundation/Foundation.h>

int main() {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    NSArray *keys = [NSArray arrayWithObjects:@"key1", @"key2", @"key3", nil];
    NSArray *objects = [NSArray arrayWithObjects:@"value1", @"value2", @"value3", nil];
    NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:objects forKeys:keys];
    for(id key in dictionary){
        NSLog(@"key: %@, value: %@", key, [dictionary objectForKey:key]);

akio0911

#import <Foundation/Foundation.h>

int main() {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    NSArray *keys = [NSArray arrayWithObjects:@"key1", @"key2", @"key3", nil];
    NSArray *objects = [NSArray arrayWithObjects:@"value1", @"value2", @"value3", nil];
    NSMutableDictionary *dictionary = [NSMutableDictionary dictionaryWithObjects:objects forKeys:keys];
    for(id key in dictionary){
        NSLog(@"key: %@, value: %@", key, [dictionary objectForKey:key]);

akio0911

#import <Foundation/Foundation.h>

int main() {
    NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];

    NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
                                       [NSNumber numberWithInt:63], @"Mathematics",
                                       [NSNumber numberWithInt:72], @"English",
                                       [NSNumber numberWithInt:55], @"History",
                                       [NSNumber numberWithInt:49], @"Geography",