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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have this piece of code below. How do I initialize each element = false? boolean[] seats = new boolean[10] I saw a similar question. But, the second line didnt make sense to me (Can you explain the 2nd line?). Boolean[] array = new Boolean[size]; Arrays.fill(array, Boolean.FALSE); 回答1: The default value for the elements in a boolean[] is false. You don't need to do anything. The reason it's necessary for Boolean[] is because the default value is null . To initialize to true, use the overload of Arrays.fill that accepts a boolean[] .

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a piece of code and I'm trying to find out why one variation works and the other doesn't. return View::make('gameworlds.mygame', compact('fixtures'), compact('teams'))->with('selections', $selections); This allows me to generate a view of arrays for fixtures, teams and selections as expected. However, return View::make('gameworlds.mygame', compact('fixtures'), compact('teams'), compact('selections')); does not allow the view to be generated properly. I can still echo out the arrays and I get the expected results but the view does not

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Suppose I have model User which have many to many relation to itself named as friends . so $user->friends (or $model->friends in view) gives me an array of User objects. I wanted to display the friends as gridview. But CGridView data as dataProvider object. Googling for it found the way to convert array of model objects to dataProvider object as given below. $this->widget('zii.widgets.grid.CGridView', array( 'id' => 'gridUser', 'dataProvider' => new CArrayDataProvider($model->friends, array()), )); Now using this I get an error Property

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: There is two ways to figure out if an array is an array or an object. Using typeof item === "object"; will return true for an object and an array since arrays are relatively new to javascript and arrays are prototypes of objects(may have worded this wrong, feel free to correct me). So the two ways I know of to determine if an Array is an Array are: Solution 1: Array.isArray(item); Solution 2: item instanceof Array; My questions are: What is the difference between these two solutions? Which of these two is the preferred solution? Which has a

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I wanna create basic matlab program that normalizes given array of integer in the given range. Inputs are an array [ a1 , a2 , a3 , a4 , a5 , a6 , a7... ], and the range [ x , y ] Output is normalized array. But in everywhere, i see the normalization in the range of [0,1] or [-1,1]. Can't find variable range normalization. I will be grateful if you write the matlab code or the formula for variable range. Thank you for ideas. 回答1: If you want to normalize to [x, y] , first normalize to [0, 1] via: range = max(a) - min(a); a = (a - min(a)) /

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm looking into making charts with D3, and stumbled upon the d3.bisector . However, I don't understand what it is or does from the documentation. Almost all examples that I find in the web use a Date array, similar to the example in the official documentation: var data = [ {date: new Date(2011, 1, 1), value: 0.5}, {date: new Date(2011, 2, 1), value: 0.6}, {date: new Date(2011, 3, 1), value: 0.7}, {date: new Date(2011, 4, 1), value: 0.8} ]; var bisect = d3.bisector(function(d) { return d.date; }).right; So what does the bisector do, besides

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have 2 Entities - User and Group. They have a many-to-many relationship and Group is used to store a users' roles. I'm trying to make a User edit form by adding a collection, I want to be able to add a new role by selecting it from a dropdown (limited to what's already in the DB) UserType.php: class UserType extends AbstractType { public function buildForm(FormBuilderInterface $builder, array $options) { $builder ->add('username') ->add('email') ->add('forename') ->add('surname') ->add('isActive') ->add('joinDate', 'date', array('input' =>

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: When I inserted some documents into a collection (without an ObjectID) mongoDB adds its own ObjectIDs. I want to query a document by its unique ObjectID. $db->collection_name->find(array('_id'=>'4e49fd8269fd873c0a000000'))); It does not work either with prefix of MongoID or ObjectID in front of '4e49fd8269fd873c0a000000'. What is the proper way to query by ObjectID with mongoDB in PHP? 回答1: Pretty sure you have to use a MongoId object, eg $item = $collection->findOne(array( '_id' => new MongoId('4e49fd8269fd873c0a000000'))); The notes on the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Ok, I just started with Lumen and I'm trying to use the Auth, but a call to either Auth::check or any other function of Auth.. leads to the below Error Fatal error: Class 'Memcached' not found in vendor\illuminate\cache\MemcachedConnector.php on line 52 . I don't want to use Memcached never used it before. I disabled it in the .env file and set the CACHE_DRIVER and SESSION_DRIVER to array, but still shows the same error. I decided not to use Auth again and to manually handle my authetication with sessions/tokens, but enabling the MiddleWare

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: In my application , I have ApiController with actionUsers , So in YII the path becomes api/users . Now in order to get certain users info , I use the following path api/users/id/10 where 10 is the userID and id part of the path is basically a GET parameter ( api/users?id=10 ). Is there any way to do the same thing without id part of the path, i.e. I want my path to look like api/users/10 ? Thank you! 回答1: You're going to need to put in rule patterns in the urlManager component: Yii Framework Documentation: url Your config should look