小编ohh*_*hho的帖子

我想使用PDO,但我不确定我的主机是否已正确设置.

我如何在PHP中测试它是否已设置并适用于MySQL？

A(当新创建单元格时):

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

        CGRect frame = CGRectMake(0, 0, 160, 50);
        UILabel *label = [[UILabel alloc] initWithFrame:frame];
        label.textAlignment = UITextAlignmentRight;
        label.text = @"9:00am";
        [cell.contentView addSubview:label];
        [label release];
    }

    return cell;
}

或B(每次发现细胞时):

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) { …

给定PHP字符串数组,例如:

['peter', 'paul', 'mary']

如何生成此数组元素的所有可能排列？即:

peter-paul-mary
peter-mary-paul
paul-peter-mary
paul-mary-peter
mary-peter-paul
mary-paul-peter

例:

result = ActiveRecord::Base.connection.execute("select 'ABC'")

我怎样才能从中获得'ABC'价值result？尝试result.first没有成功.谢谢

ps宝石:

activerecord(2.3.9)
mysql(2.8.1)

当我尝试POST时RestKit,Rails控制台中有一个警告:

Started POST "/friends" for 127.0.0.1 at 2012-04-16 09:58:10 +0800
Processing by FriendsController#create as */*
Parameters: {"friend"=>{"myself_id"=>"m001", "friend_id"=>"f001"}}
WARNING: Can't verify CSRF token authenticity
(0.1ms)  BEGIN
SQL (1.7ms)  INSERT INTO `friends` (`friend_id`, `myself_id`) VALUES ('f001', 'm001')
(1.1ms)  COMMIT
Redirected to http://127.0.0.1:3000/friends/8
Completed 302 Found in 6ms (ActiveRecord: 3.0ms)

这是客户端代码:

NSMutableDictionary *attributes = [[NSMutableDictionary alloc] init];
[attributes setObject: @"f001" forKey: @"friend_id"];
[attributes setObject: @"m001" forKey: @"myself_id"];
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObject:attributes forKey:@"friend"];
[[RKClient sharedClient] post:@"/friends" params:params delegate:self];

我该如何摆脱警告？

我正在考虑node.js为即将开展的项目使用工具,用于学习和性能目的.例如,Rails中的一些模型:

class User
  has_many :topics
  has_many :friends
  has_many :friend_users, :through => :friends
  has_many :friend_topics, :through => :friend_users, :source => :topics      
end

class Friend
  belongs_to :user
  belongs_to :friend_user, :class_name => "User", 
      :foreign_key => :phone_no, :primary_key  => :phone_no
end

class Topic
  belongs_to :user
end

允许优雅的查询代码,如:

latest_10_topics_from_friends = current_user.friend_topics.limit(10)

并生成优化的SQL.node.js生态系统中有类似的东西吗？

Xcode没有给出我的(想到的)拼写错误:

 NSString *theme = [[NSUserDefaults standardUserDefaults] objectForKey:@"theme"];
 NSLog(@"Theme: %@", theme ?: @"Default");

事实证明:

 NSLog(@"Theme: %@", theme ?: @"Default");

与以下相同:

 NSLog(@"Theme: %@", theme ? theme : @"Default");

以上缩短语法只适用于gcc吗？或者它是Objective-C的一部分？

在iPhone配置门户上,它显示我的iPhone团队配置文件无效.有一个"由Xcode管理"文本."续订"按钮被禁用.

我该如何解决这个问题？谢谢

假设iOS 3.2或更高版本.使用最初隐藏的控件进行移动的命令的正确顺序是什么.当电影正在播放时,用户可以选择在屏幕上标记并显示控件.

谢谢!

我的(控件未隐藏)代码:

- (void)playMovie
{
    NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"Test" ofType:@"m4v"]];  
    MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];  

    // Register to receive a notification when the movie has finished playing.  
    [[NSNotificationCenter defaultCenter] addObserver:self  
                                             selector:@selector(movieDone:)  
                                                 name:MPMoviePlayerPlaybackDidFinishNotification  
                                               object:moviePlayer];  

    [[NSNotificationCenter defaultCenter] addObserver:self  
                                             selector:@selector(movieState:)  
                                                 name:MPMoviePlayerNowPlayingMovieDidChangeNotification  
                                               object:moviePlayer];  

    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(movieReady:) 
                                                 name:MPMoviePlayerLoadStateDidChangeNotification 
                                               object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willEnterFullScreen:) name:MPMoviePlayerWillEnterFullscreenNotification object:moviePlayer];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willExitFullScreen:) name:MPMoviePlayerWillExitFullscreenNotification object:moviePlayer];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didFinishPlayback:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];


    if ([moviePlayer respondsToSelector:@selector(setFullscreen:animated:)]) {  
        moviePlayer.controlStyle = MPMovieControlStyleDefault; // MPMovieControlStyleNone MPMovieControlStyleEmbedded MPMovieControlStyleFullscreen …

可能重复:
用于电话号码验证的全面正则表达式

如何在objective-c中验证电话号码(NSString*)？规则:

• 最少7位数
• 最多10位数
• 第一个数字必须是2,3,5,6,8或9

谢谢