populate

问题 In Objective-C, I have a dictionary: firstName -> John lastName -> Smith age -> 34 and an object Person that has corresponding instance variables and properties (that handle memory management appropriately). I'd like to create a convenience initializer that takes a dictionary as an argument and populates all the object fields (via their properties for memory management purposes) from the dictionary keys/values, instead of manually doing something like: obj.firstName = [dict objectForKey:@

问题 This question already has answers here : Javafx PropertyValueFactory not populating Tableview (2 answers) Closed 3 years ago . I just started with javafx and I wanted to create a TableView with 3 columns where I can display some values. I created the TableView and the columns with the scene editor as fxml file. Then I created a class named Values with the special properties I matched to the columns where they should fit in. Finally I set the observable list with the "Value" objects in it as

问题 db.History.find({'_file.project': 'someproject' ) .populate('_file', 'name reference project') .sort(sortField || '-created') .limit(max || 64) .exec(this); Here I'm trying to find all documents which match on a populated field from the _file reference. Is doesn't seem to work. Is something like this possible at all? I could duplicate the project field to this object, as a workaround just for querying but I'd rather not of course. 回答1: No, a find query's conditions parameter can only

问题 I am learning some node and have been trying to use mongoose. Currently, my goal is to learn how to use populate. I have a projects definition and milestone require: projectSchema = new mongoose.Schema({ id: String, title: String, description: String, owner: String, site: String, creation_date: Date, milestone_ids: Array, milestones: [{ type: mongoose.Schema.Types.ObjectId, ref: "Milestone" }] }) Project = mongoose.model("Project", projectSchema) milestones = require(__dirname + "/milestones

问题 In my code I need to remove rows from the DataGridView after a recurring interval, and so I call the following function when a timer expires: private void removeRows(DataGridView dgv) { foreach (DataGridViewRow row in dgv.Rows) { // if some condition holds dgv.Remove(row); } dgv.Refresh(); } I know the rows are successfully deleted from the DataGridView, though they still remains in the display for whatever reason. Any tips on what I might be doing wrong? 回答1: If you have bound your datagrid

问题 I have a select drop down where in i need to populate the selected value from API and the other options are hardcoded. On select of an option , I need to populate it along with the icon. After selection , the color of the option selected should be in blue color ( both text and icon ) with a tick mark besides it. How can i achieve this. Above image shows the pre population of data ( both text and icon )from API. Above image shows on click of a drop down, a tick mark is shown with change in

问题 I have a small challenge at least for me which I couldn't solve yet. Could you help me to figure it out? Actually my question consist of two and I can't split them into a different questions. I have Symfony2 (2.3.1) installed. Here is my entities: Category: // src/Acme/DemoBundle/Entity/Category.php namespace Acme\DemoBundle\Entity; use Gedmo\Mapping\Annotation as Gedmo; use Doctrine\ORM\Mapping as ORM; /** * @Gedmo\Tree(type="nested") * @ORM\Table(name="categories") * use repository for

问题 I need to populate a list with 5 positions. new_list = ___ ___ ___ ___ ___ I receive 2 lists and I have one default value to populate the new list. Now start the problems: In the good way, I receive 2 values from listA and 2 values from listB and add the default value A1 A2 DEFAULT B1 B2 But now, if for example listA is empty I need to populate in another way: DEFAULT B1 B2 B3 B4 the same if listB is empty. In case listA just has 1 element, and listB another element it should be: A1 DEFAULT

问题 This is GA for a timetable problem. I'm trying to create an initial population, but it isn't working as it isn't entering the if condition. can someone point out the error? I tried inserting statements in each condition, but everything checks out. Still, I don't seem to find a solution. #include<stdio.h> #include<math.h> #include<stdlib.h> #include<ctype.h> #include<time.h> int random_number_creator(int upper, int lower) { int n; n = rand() % (upper-lower)+ lower; return n; } struct pop{ int

问题 I'm having some difficulty populating a combobox with the values inside a list. The list contains the following. public List<Classroom> classes= new List<Classroom>(); CONTAINS: public List<Students> Members{ get;} public Classroom(string naam, string code, int maxPersonen) { Name= name; Code = code; MaxPeople= maxpeople; Members= new List<Members>(); } i'm trying to populate my combobox with List classes and show each of these classes as following (currently using this): foreach(Classroom