object

问题 I would like two display Object data gotten from Parse in swift. I have tried using label in this way but it only displays the last element in the object. Please how can I make it display all the element in the object in the label. Like one element to one label. Thanks let query = PFQuery(className: "Questionnaire") query.findObjectsInBackground { (objects, error) -> Void in if error == nil { // There were no errors in the fetch if let returnedObjects = objects { // var text = "" // Objects

问题 I am struggling to create dynamic nested keys in javascript. My problem is that I need to have a object like this { "grandGrandFather": 'A', "firstGrandFather": { name: "AA", children: { first: 'AAA', children: { first: "AAAA" } } }, "secondGrandFather": { name: "AB", first: 'ABA', children: { first: "ABAA", second: "ABAB" } } }, "thirdGrandFather": { name: "AC", children: { name: "ACA" } } } Here problem is that I need to fetch these data from somewhere and I need to create these values

问题 I have an issue that I am struggling to grasp. Any help would be greatly appreciated. I have an Object, and I assign the current object state to a property on the current object. example below: var product = { ropeType: 'blah', ropePrice: 'blah', ropeSections: { name: 'blaah', price: 'blaah' }, memory: false } product.memory = product; Now when I look at the product object within the console I get a inifinite recursion of Product.memory.Product.memory.Product.... screenshot below: I know its

问题 I have a object with all my users, like so: var users = {user1:{}, user2:{}} , And every user has a isPlaying property. How do I get all users that have isPlaying false? 回答1: You should use Object.keys , Array.prototype.filter and Array.prototype.map : // This will turn users object properties into a string array // of user names var userNames = Object.keys(users); // #1 You need to filter which users aren't playing. So, you // filter accessing users object by user name and you check that //

问题 In my project, I generate an object obj of type CubicObject . At runtime, a GUI setting should be allowed to change the type of obj to Tofu or Box (and back), depending on what the user wants to do and what (s)he thinks the object is best represented by. Then the user should benefit from specific algorithms implemented in the corresponding classes. I am looking for a nice implementation of this behaviour. I have played with the code below, which changes the __class__ attribute, but I am sure

问题 I've written a python script to take a large file (a matrix ~50k rows X ~500 cols) and use it as a dataset to train a random forest model. My script has two functions, one to load the dataset and the other to train the random forest model using said data. These both work fine, but the file upload takes ~45 seconds and it's a pain to do this every time I want to train a subtly different model (testing many models on the same dataset). Here is the file upload code: def load_train_data(train

问题 I've written a python script to take a large file (a matrix ~50k rows X ~500 cols) and use it as a dataset to train a random forest model. My script has two functions, one to load the dataset and the other to train the random forest model using said data. These both work fine, but the file upload takes ~45 seconds and it's a pain to do this every time I want to train a subtly different model (testing many models on the same dataset). Here is the file upload code: def load_train_data(train

问题 This question already has answers here : Why does my ArrayList contain N copies of the last item added to the list? (5 answers) Closed 3 years ago . the following code: List<List<Integer>> res = new ArrayList<>(); List<Integer> row = new ArrayList<>(); for (int i = 1; i <= 3; i++) { row.add(i); res.add(row); } res: [ [1,2,3],[1,2,3] ,[1,2,3]] wrote in this way: for (int i = 1; i <= 3; i++) { row.add(i); res.add(new ArrayList<>(row)); } res: [ [1],[1,2] ,[1,2,3]] 回答1: In the first case, you've

问题 I have an ArrayList of Items and I want to be able remove one Item from the list by entering only one Item attribute, for example its number (int ItemNumber). I also wanna do the same when I check Item quantities. These are my equals() & contains() methods, do I need to make any changes here? public boolean contains(T anEntry) { boolean found = false; for (int index = 0; !found && (index < numberOfEntries); index++) { if (anEntry.equals(list[index])) found = true; }//end for return found; } /

问题 I would like to know the correct way to completely dereference a JavaScript Object from memory. To ensure it's deletion without it dangling in memory, and that the garbage collector removes the object. When I looked and this question Deleting Objects in JavaScript. It was explained that if you delete all the references of object, the GC will remove it from memory. I want to know how do I go about removing references from an object that has both methods and properties. Suppose you have and