methods

问题 So first I have this class: public float getPixel(int height, int width) { return data[height][width]; } public void setPixel(float value, int height, int width) { if (value > getMax()) value = getMax(); if (value < 0) value = 0; data[height][width] = value; } private Image(String magicNumber, int height, int width, float max) { this.magicNumber = magicNumber; this.width = width; this.height = height; this.max = max; data = new float[height][width]; } ... public Image clone() { Image clone =

问题 So first I have this class: public float getPixel(int height, int width) { return data[height][width]; } public void setPixel(float value, int height, int width) { if (value > getMax()) value = getMax(); if (value < 0) value = 0; data[height][width] = value; } private Image(String magicNumber, int height, int width, float max) { this.magicNumber = magicNumber; this.width = width; this.height = height; this.max = max; data = new float[height][width]; } ... public Image clone() { Image clone =

问题 Hi i have 100 annotations in mapview ontap of one of its annotations i should get annotation index related to that. Does anyone have idea about getting tag number for that? Looking for any delegate method does. 回答1: Found an answer this will return annotation tapped number: - (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view { NSUInteger index = [mapView.annotations indexOfObject:view.annotation]; NSLog(@"index no %d",index); } The above code will generate

问题 I need to call my datetime variable from another class, this is the code for querying with date condition static DataTable GetCustomerRecords(DateTime date, DateTime date2) { var connSettings = ConfigurationManager.ConnectionStrings["MyDB"]; { string CN = connSettings.ConnectionString; MySqlConnection conn = new MySqlConnection(CN); MySqlCommand cmd = new MySqlCommand("select value1, value2, value3, date2 from dummy table where date1 >= CAST(@startDate AS DATE) and date2 <= CAST(@endDate AS

问题 I've searched how to run a method from another ViewController on stackoverflow and didn't find an answer. I have a ViewController1 playing an audio using AVAudioPlayer and I want my ViewController2 to be able to change it's volume. I've tried the basic: calling a method in ViewController2 that changes the volume in ViewController1 . This doesn't work. The method is able do output Logs but isn't able to change properties. Thanks 回答1: You need to pass a message from ViewController2 to

问题 based on this XML <schedule> <flight="A01"> -<Aircraft mdy="Thursday, September 1, 2016" Destination="Mykonos" Source="Athens" ID="A320"> <FROM>ATH</FROM> <TO>MYK</TO> <Miles>300</Miles> </Aircraft> </flight> </schedule> I have the following code XDocument reservation = XDocument.Load("schedulemanager.xml"); var r = (from element in XDocument.Load("schedulemanager.xml").Descendants("Aircraft") let type = element.Attribute("mdy").Value select type == dtArrival.Text ? MessageBox.Show("Dates are

问题 This question already has an answer here : Closed 7 years ago . Possible Duplicate: Return Global Variable from Javascript Method I have this. var thisData = ""; function calculateThings(newData) { thisData = newData.things.otherthings //has a value of 10; } alert(thisData) //returns nothing What am I doing wrong? 回答1: you need to call your function: calculateThings(newData); should be more like: var thisData = ""; function calculateThings(data) { thisData = data.things.otherthings //has a

问题 I am using Ruby 1.9.2 and the Ruby on Rails v3.2.2 gem. I am trying to learn Metaprogramming "the right way" and at this time I am aliasing an instance method in the included do ... end block provided by the RoR ActiveSupport::Concern module: module MyModule extend ActiveSupport::Concern included do # Builds the instance method name. my_method_name = build_method_name.to_sym # => :my_method # Defines the :my_method instance method in the including class of MyModule. define_singleton_method(my

问题 I'm a noob to android and i am having an issue calling a method from another class. The method works works fine when called from within its own class, but i get a nullpointerexception when i call it from another class. Any help would be greatly appreciated. Here is my code; Calling method in class1 from class2: BottlesActivity inst = new BottlesActivity(); inst.call0(); Method in class 1: public void call0() { try { Intent callIntent = new Intent(Intent.ACTION_CALL); callIntent.setData(Uri

问题 I have some example code in which I declare a type foo with some methods which call each other (say: foo.get , which is called by foo.double and foo.toString ). I have another type, bar , which embeds foo and redefines get . I am forced to redefine double and toString on bar , so they can see bar.get (rather than only foo.get ), but the body of these functions is basically identical to the original. Is there a better way to organise this code, to avoid the redundancy while still having bar