object

问题 Compare Array of Objects function compare (arr1, arr2){ //if object key value pair from arr2 exists in arr1 return modified array for (let obj of arr2) { if(obj.key === arr1.key){ return obj } } } // Should return [{key: 1, name : "Bob", {key: 2, name : "Bill"}] compare([{key: 1}, {key: 2}], [{key: 1, name : "Bob"}, {key: 3, name : "Joe"}, {key: 2, name : "Bill"}]) I am having a disconnect with looping arrays of objects with different lengths and properties. I have tried looping and IndexOf

问题 People! It's my first question here as junior frontend dev. I have function (https://jsfiddle.net/kmjhsbt9/) which transforms a flat array like this : const filePaths = [ 'src/lib/git.js', 'src/lib/server.js', 'build/css/app.css', 'externs/test/jquery.js', ]; into object tree like this: [ src: { lib: { git.js: 'file', server.js: 'file', } }, build: { css: { app.css: 'file' } } ..... ] Please, help me to understand how I can rewrite the function so that it outputs the result in this format: [

问题 I have a use case where I have an object of varying values, and I need to get all of these keys that have a specific value. For instance, here is a sample object: myObject = { Person1: true, Person2: false, Person3: true, Person4: false }; The key names will vary, but the valid values are true or false. I want to get an array of the names that have a value of true: myArray2 = [ 'Person1', 'Person3 ]; I've been trying to use various lodash functions in combination such as _.key() and _.filter,

问题 I have a model called 'Competicion', with some objects and another model called 'Participante'. This second model has two fields: a foreignkey with the user and another foreingkey to 'Competicion'. In the view, I've made queryset from 'Competicion' and with a for loop in the template I've given each object the button of the form. With storing the user of the current session I have no problem but I want the form to know which object of the queryset it is to grab its id. #I have no problem with

问题 In R, str() is handy for showing the structure of an object, such as the list of lists returned by lm() and other modelling functions, but it gives way too much output. I'm looking for some tool to create a simple tree diagram showing only the names of the list elements and their structure. e.g., for this example, data(Prestige, package="car") out <- lm(prestige ~ income+education+women, data=Prestige) str(out, max.level=2) #> List of 12 #> $ coefficients : Named num [1:4] -6.79433 0.00131 4

问题 Today I come to your aid in favor of optimizing some code! I was asked to solve a problem on a test a few weeks ago, and came up with this non-optimal solution since I'm beggining to learn Javascript. I wonder if there's a way (of course there is) to make this better. Here's the situation: "I am a particular kind person who has an infinite ammount of $2, $5 and $10 dollar bills, and I'm willing to change cash for anyone who wants it, BUT in the most efficient way, with the minimum ammount of

问题 Today I come to your aid in favor of optimizing some code! I was asked to solve a problem on a test a few weeks ago, and came up with this non-optimal solution since I'm beggining to learn Javascript. I wonder if there's a way (of course there is) to make this better. Here's the situation: "I am a particular kind person who has an infinite ammount of $2, $5 and $10 dollar bills, and I'm willing to change cash for anyone who wants it, BUT in the most efficient way, with the minimum ammount of

问题 Today I come to your aid in favor of optimizing some code! I was asked to solve a problem on a test a few weeks ago, and came up with this non-optimal solution since I'm beggining to learn Javascript. I wonder if there's a way (of course there is) to make this better. Here's the situation: "I am a particular kind person who has an infinite ammount of $2, $5 and $10 dollar bills, and I'm willing to change cash for anyone who wants it, BUT in the most efficient way, with the minimum ammount of

问题 I'm having unseen object leak (CFRuntimeCreateInstance) when profiling my app with instrument leak tool. I have rough imagination where the leak occurs but unable to spot it :) The call tree points me to my class method for loading an image from a spritesheet. Here is a fragment of the call tree (until leaking object CFRuntimeCreateInstance): +[ImageCache loadImageOfType:andIndex:] +[NSString stringWithFormat:] _CFStringCreateWithFormatAndArgumentsAux CFStringCreateCopy _

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