Can you write a generator function which will return unlimited Fibonacci numbers?

How will you return the promise which will resolve earlier than others in an array of promises and cancel others which are pending?

Please find the code below: const cacheSourceA = new Promise((resolve, reject) => { setTimeout(() => resolve({ someValue: 101 }), 1500); }); const cacheSourceB = new Promise((resolve, reject) => { setTimeout(() => resolve({ someValue: 100 })...

Can you write a function that returns same result for both sum(2, 3) and sum(2)(3)?

I was trying currying in js but it works for sum(2)(3) and not on sum(2, 3) const sum = a => b => a + b; Where can I get more such challenges to practice and learn?

How to style title of a canvas?

I'm able to dynamically update the value of title of a canvas but I'm yet to style it so that I can show it as a tooltip. Let me know if it's possible to style a canvas title. <canvas id="tutorial" title= "styleme" width="150" height="150"></canvas>...

Is it just me or it's really not that interesting or helpful to read tech blogs which involves code snippets on mobile/smaller devices?

I find it difficult to follow tech related articles which involves code snippets and in case of a long article the scrolling demotivates me to read it further or to keep track of it when I save it for later. I think the UX for articles like these can...

How to cancel a promise if it isn't resolved in some given time? What is the most effective way to achieve this in es6/reactjs?

How to write your own custom map and filter method in js?

How to write your own custom map, filter, reduce etc. in pure javascript?

How to communicate between two components in reactjs?

How to communicate between two components in reactjs in general and also how to communicate when both the components are stateless? An example will be very helpful :)

Developing an online bookings web app with MERN stack?

I'm developing a online bookings web application using MERN. My main concerns are: Concurrency (like booking a particular item by multiple users at the same time) Security (web application security) Can somebody elaborate how should I approach thes...

How to develop a real time file upload with Angular 2 and Node.js?

Usually, while we upload it takes files to the temp directory first and then move it to the desired directory. But I'm working on Big Data e.g. uploading thousands of files at once. So I need to upload those files directly to the desired location and...