Elton's Blog

typedef struct _NSRange
{
  NSUInteger location;
  NSUInteger length;
} NSRange;

#if __LP64__ || TARGET_OS_EMBEDDED || TARGET_OS_IPHONE || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64
typedef unsigned long NSUInteger;
#else
typedef unsigned int NSUInteger;
#endif

NSString *homebrew = @"Imperial India Pale Ale (IPA)";
 
// Starting at position 25, get 3 characters
NSRange range = NSMakeRange (25, 3);
 
// This would also work:
// NSRange range = {25, 3};
 
NSLog (@"Beer shortname: %@", [homebrew substringWithRange:range]);

NSString *homebrew = @"Imperial India Pale Ale (IPA)";
NSRange range = [homebrew rangeOfString:@"IPA"];
 
// Did we find the string "IPA" ?
if (range.length > 0)
  NSLog(@"Range is: %@", NSStringFromRange(range));

NSString *homebrew = @"Imperial India Pale Ale (IPA)";
 
// Search for the "ia" starting at the end of string
NSRange range = [homebrew rangeOfString:@"ia" options:NSBackwardsSearch];
 
// What did we find
if (range.length > 0)
  NSLog(@"Range is: %@", NSStringFromRange(range));

@property (retain) NSArray *colors;
self.colors = [NSArray arrayWithObjects:@"Gray", @"Silver", @"Black"];

self.colors = nil;

[self.colors release];

NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"];
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
[request start];
NSError *error = [request error];
if (!error) {
    NSString *response = [request responseString];
}

[request addRequestHeader:@"name" value:@"Jory lee"];

[request setPostValue:@"Ben" forKey:@"first_name"];
[request setPostValue:@"Copsey" forKey:@"last_name"];
[request setFile:@"/Users/ben/Desktop/ben.jpg" forKey:@"photo"];

[request setUsername:@"username"];
[request setPassword:@"password"];

- (IBAction)grabURLInBackground:(id)sender
{
NSURL *url = [NSURL URLWithString:@"http://allseeing-i.com"];
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
[request setDelegate:self];
[request startAsynchronous];
}
 
- (void)requestFinished:(ASIHTTPRequest *)request
{
// Use when fetching text data
NSString *responseString = [request responseString];
 
// Use when fetching binary data
NSData *responseData = [request responseData];
}
 
- (void)requestFailed:(ASIHTTPRequest *)request
{
NSError *error = [request error];
}

- (IBAction)grabURLInTheBackground:(id)sender
{
if (![self queue]) {
[self setQueue:[[[NSOperationQueue alloc] init] autorelease]];
}
 
NSURL *url = [NSURL URLWithString:@"http://allseeing-i.com"];
ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url];
[request setDelegate:self];
[request setDidFinishSelector:@selector(requestDone:)];
[request setDidFailSelector:@selector(requestWentWrong:)];
[[self queue] addOperation:request]; //queue is an NSOperationQueue
}
 
- (void)requestDone:(ASIHTTPRequest *)request
{
NSString *response = [request responseString];
}
 
- (void)requestWentWrong:(ASIHTTPRequest *)request
{
NSError *error = [request error];
}

AVAudioPlayer  *player;
NSString       *path;
 
// 设置音乐文件路径
path = [[NSBundle mainBundle] pathForResource:@"sound-file" ofType:@"mp3"];
 
// 判断是否可以访问这个文件
if ([[NSFileManager defaultManager] fileExistsAtPath:path]) 
{    
  // 设置 player
  player = [[AVAudioPlayer alloc] initWithContentsOfURL:
     [NSURL fileURLWithPath:path] error:&error];
 
  // 调节音量 (范围从0到1)
  player.volume = 0.4f;
 
  // 准备buffer，减少播放延时的时间      
  [player prepareToPlay];
 
  // 设置播放次数，0为播放一次，负数为循环播放
  [player setNumberOfLoops:0];
 
  [player play];    
 
}    
 
...
 
// 清理工作
if (player != nil)
{
  if (player.isPlaying == YES)
    [player stop];
  [player release];
}

$ sudo gem install -r passenger
$ sudo passenger-install-apache2-module

$ cd /etc/apache2

LoadModule passenger_module /Library/Ruby/Gems/1.8/gems/passenger-2.2.4/ext/apache2/mod_passenger.so
PassengerRoot /Library/Ruby/Gems/1.8/gems/passenger-2.2.4
PassengerRuby /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby

$ sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config

struct stat {
        mode_t     st_mode;       //文件对应的模式，文件，目录等
        ino_t      st_ino;       //inode节点号
        dev_t      st_dev;        //设备号码
        dev_t      st_rdev;       //特殊设备号码
        nlink_t    st_nlink;      //文件的连接数
        uid_t      st_uid;        //文件所有者
        gid_t      st_gid;        //文件所有者对应的组
        off_t      st_size;       //普通文件，对应的文件字节数
        time_t     st_atime;      //文件最后被访问的时间
        time_t     st_mtime;      //文件内容最后被修改的时间
        time_t     st_ctime;      //文件状态改变时间
        blksize_t st_blksize;    //文件内容对应的块大小
        blkcnt_t   st_blocks;     //伟建内容对应的块数量
      };