initializer

问题 (I'm sure this question has already been answered, I'm just not sure on the right words to use to ask it. If someone would tell me what the correct terminology is that would be awesome!) I'm implementing a HashSet in C++ for a data structures class, and I have a question about C++ syntax regarding structs. Here is my code: struct HashNode { T value; HashNode* next = nullptr; }; Will this code correctly initialize the next pointer to nullptr when new HashNode is called? If not, what is the

问题 I simply want to create an array of two dimensional arrays to store coordinate points. So I want an array where each index returns a two dimensional array which I would use as x and y . Here's what I've tried: waypoints = new int[4][,] { {{0},{6, 0}}, {{1},{1, 1}}, {{2},{1, 5}}, {{3},{6, 5}} }; I realize this probably looks stupid, but I've tried looking it up on Google, and I have not gotten any good results. It gives an error: "error CS0623: Array initializers can only be used in a variable

问题 I simply want to create an array of two dimensional arrays to store coordinate points. So I want an array where each index returns a two dimensional array which I would use as x and y . Here's what I've tried: waypoints = new int[4][,] { {{0},{6, 0}}, {{1},{1, 1}}, {{2},{1, 5}}, {{3},{6, 5}} }; I realize this probably looks stupid, but I've tried looking it up on Google, and I have not gotten any good results. It gives an error: "error CS0623: Array initializers can only be used in a variable

问题 In Android, if a TextToSpeech instance fails to initialize (the callback invoked indicating the completion of the TextToSpeech engine initialization returns TextToSpeech.ERROR), does that mean that subsequent attempted method calls to that instance will result in null pointer exceptions? Example... We initialize the object: t1 = new TextToSpeech(getApplicationContext(), new TextToSpeech.OnInitListener() { @Override public void onInit(int status) { if (status == TextToSpeech.ERROR) { Log.i(

问题 When using tf.layers.conv2d , setting the initializer is easy, it can be done through its parameter. But what if I use tf.nn.conv2d ? I use this code. Is this equivalent to setting the kernel_initializer parameter in tf.layers.conv2d ? Although the program runs without errors, I don't know how to verify whether it does what it is expected do. with tf.name_scope('conv1_2') as scope: kernel = tf.get_variable(initializer=tf.contrib.layers.xavier_initializer(), shape=[3, 3, 32, 32], name='weights

问题 When using tf.layers.conv2d , setting the initializer is easy, it can be done through its parameter. But what if I use tf.nn.conv2d ? I use this code. Is this equivalent to setting the kernel_initializer parameter in tf.layers.conv2d ? Although the program runs without errors, I don't know how to verify whether it does what it is expected do. with tf.name_scope('conv1_2') as scope: kernel = tf.get_variable(initializer=tf.contrib.layers.xavier_initializer(), shape=[3, 3, 32, 32], name='weights

问题 I'd like to subclass MKCircle (e.g. MyCircle ) by adding another String property, let's call it " code ". This property shall not be an optional and constant, so I have to set it from an initializer, right? Of course MyCircle should also get center coordinate and the radius. These two properties are read-only, so I also need to set them via initializer. In the end I need an initializer that takes 3 parameters: coordinate , radius and code . Sounds pretty easy but Swifts designated and

问题 I'd like to subclass MKCircle (e.g. MyCircle ) by adding another String property, let's call it " code ". This property shall not be an optional and constant, so I have to set it from an initializer, right? Of course MyCircle should also get center coordinate and the radius. These two properties are read-only, so I also need to set them via initializer. In the end I need an initializer that takes 3 parameters: coordinate , radius and code . Sounds pretty easy but Swifts designated and

问题 I'd like to subclass MKCircle (e.g. MyCircle ) by adding another String property, let's call it " code ". This property shall not be an optional and constant, so I have to set it from an initializer, right? Of course MyCircle should also get center coordinate and the radius. These two properties are read-only, so I also need to set them via initializer. In the end I need an initializer that takes 3 parameters: coordinate , radius and code . Sounds pretty easy but Swifts designated and

来源： https://stackoverflow.com/questions/28791639/initializer-vs-constructor