Develop a function that takes in another function and outputs a new function that includes timestamps

Develop a function called dateStamp which takes another function as input and returns a new function. This returned function will accept the same arguments as the passed-in function and produce an object with two keys: date, representing today's date (without the time) in a human-readable string format, and output, containing the result of executing the original function.

Snippet of the code:

const dateStamp = (inputFunc) => {

    let todayDate = new Date()
    console.log(todayDate)

    let newObj = {};

    return function (num) {
        newObj.date = todayDate;
        newObj.output = inputFunc(num);
        return newObj;
    }
}

// Uncomment these to check your work!
const stampedMultBy2 = dateStamp(n => n * 2);
    
console.log(stampedMultBy2(4)); // should log: { date: (today's date), output: 8 }
console.log(stampedMultBy2(6)); // should log: { date: (today's date), output: 12 }

The above code fails in two test specifications:

https://i.sstatic.net/de2rk.png

Queries I have:

  1. How do I extract timestamp from the current date?
  2. What might be causing the failure of the last specification?

Answer №1

1) To fix the initial error, you can utilize Date.toDateString() to specifically retrieve the date part without the time component of today's date.

2) The second issue seems to be related to overlooking the capability of the function to accept multiple arguments. You can address this by defining it as:

return function (...args) { ... };

When invoking the received function, make use of inputFunc(...args). In essence, follow this approach:

const dateStamp = (inputFunc) =>
{
    let todayDate = new Date();

    return (...args) =>
    {
        return {
            date: todayDate.toDateString(),
            output: inputFunc(...args)
        }
    }
}

const stampedMultBy2 = dateStamp(n => n * 2);
console.log(stampedMultBy2(4));
console.log(stampedMultBy2(6));

const stampedMax = dateStamp((x, y) => Math.max(x, y));
console.log(stampedMax(-5, 6));
console.log(stampedMax(1, 4));
.as-console {background-color:black !important; color:lime;}
.as-console-wrapper {max-height:100% !important; top:0;}

You can also condense the dateStamp function using arrow notation in a more succinct manner:

const dateStamp = (inputFunc) => (...args) =>
    ({date: (new Date()).toDateString(), output: inputFunc(...args)});

Answer №2

The parameter in your function is num, but it should actually be a function. The value assigned to the output field of newObj should be the result of executing the function that was passed as an argument.

newObj.output = executeFunc()

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Initiating a Page with Dynamic Modal Window according to Backend Exigencies

Dear experts, can you help me with a problem? I want to implement a modal window on an vb.aspx page if a specific condition from the codebehind query is true. How can I achieve this? Thank you! ...

'Error: Points is not a valid function' encountered in Node.js

While attempting to run the code below in Node.js, I encountered the following error. The code consists of three files: the dao file which connects to a MongoDB database, the server file, and the index1 file. var mongoose = require('mongoose'); ...

Using v-for with nested objects

Have you been attempting to create a v-for loop on the child elements of the {song: "xxx"} object within the songs array? export const data = [ {id: "1", albumname: "xx", artist: "xxxx", dateadded: "xxxx", route: "xxxx", songs: [{ song : &apos ...

Adding HTML content using jQuery's document.ready feature

As a jQuery novice, I am attempting to incorporate a Facebook like button using the jQuery document.ready function. In my external Javascript file (loaded after the jQuery script), you will find the following code snippet: $(document).ready(function(){ ...

When working with AngularJS, I encountered an issue where I added two additional input text boxes with unique IDs and ng-models, but unfortunately

After countless modifications to a form, I am puzzled as to why two additional fields are not being sent this time. Controller vm.question = {}; Although most of the time these fields will be empty, I have never encountered an issue with sending blank f ...

Is it the right time to implement a JavaScript framework?

Is there a need for using JavaScript frameworks like Angular or React if you are not developing single-page websites or components that receive live updates? ...

Angular.js Issue: Repeating elements must be unique - Index tracking not functioning properly

I have been following a tutorial on the Ionic Framework, which utilizes Angular JS to develop a basic Todo application. The app adds a new task by utilizing the .push() method to append a new task object to an array of task objects. An issue arises when a ...

Do you have to host a node server to run Angular applications?

(say) I am currently working on a project that utilizes Laravel or PHP for the back-end and Angular for the front-end. In my setup, I am using angular.js files from a CDN, which should work fine. However, I find myself confused when tutorials and books me ...

Moving the layout container towards the left: a quick guide

I am currently attempting to display the legend contents in a horizontal alignment within the layout container. The issue is that while the layout containing the legend aligns horizontally as desired, it extends beyond the screen border. I do not want the ...

A curious phenomenon observed in the behavior of the jQuery offset() method

Once I executed the following code snippet multiple times: $view.offset({ left : X, //X remains constant top : this.y }); console.log($view.offset()); //displays expected output I noticed (using Firebug) that the HTML code looked like this: <di ...

Example of jQuery UI tabs - each new tab opens with a unique script assigned

Here is a jQuery tabs script that you can check out: http://jqueryui.com/demos/tabs/#manipulation var $tabs = $( "#tabs").tabs({ tabTemplate: "<li><a href='#{href}'>#{label}</a> <span class='ui-icon ...

Unable to render Javascript model in THREE JS

I am facing an issue with this code below as I can't seem to load the model. loader = new THREE.JSONLoader(true); loader.load("modelo.js" , function ( geometry, materials) { mesh = new THREE.Mesh( geometry, ...

What is the best way to merge two values with the same property in an object using a comma as a separator

Is it possible to combine the values of properties with a separator in my scenario? Here is an example of my JSON structure: { "name": "aa", "name": "bb", "name1": "cc", "name2": "dd" } I am looking to display the values of the key 'name&apo ...

Guide on saving a Facebook image to a web server directory with Node.js and Express

Looking for some help here - I'm trying to download and save images from a user's Facebook album onto my server folder. My server is running on node.js and express, but when I tried using http.get it didn't work. Any advice or solutions wou ...

Adjusting the height of a Jquery Fancybox to allow for scrolling down

I've implemented fancybox to display certain pages on my website, but I'm struggling with setting a fixed height and enabling scrolling for content that exceeds this height within the fancybox. Here are the parameters I have used: <script> ...

When you encounter an open response and need to resend it, simply click the "Send Again

After the discontinuation of Firebug, I find myself in need of two crucial functionalities that I used frequently. To replace these features, I am wondering if there are similar options available within the default Firefox Web Console. Previously, when ma ...

Is there a way to transfer the submitted data to a different page without being redirected to it using #php and #ajaxjquery?

Hey there, I could use a little assistance. How can I send data to page update.page.php when submitting a form on index.php without being redirected? I want the functionality of sending a message from one page to another without having to refresh the ent ...

Tips for maintaining an active class on parent nav items in NextJS when navigating dynamic routes

In my nextjs-application, I've implemented a Navbar showcasing several navitems: Navbar.tsx: const Navbar = ({ navitems }) => { return ( <div> {navitems?.map((navitem, idx) => ( <NavItem key={idx} navitem={nav ...

Creating HTML content in a new window with Vue.js - a step by step guide

Recently, I encountered a problem with jsPDF regarding Unicode support in table generation. To work around this issue, I decided to utilize the browser's print feature instead. I achieved this by creating a new HTML document with the table and display ...

Conceal the div element without revealing it beforehand

Is there a method to conceal a div without it initially loading? When I attempt to hide the div, it briefly appears for about 0.5 seconds before disappearing, which makes the animation look unattractive. Is there a way to prevent this, or am I approaching ...