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[Leetcode] JS 30 Array Reduce Transformation

[Leetcode] JS 30 Array Reduce Transformation

Question 2626 for...of loop / reduce function Question Given an integer array nums, a reducer function fn, and an initial value init, return the final result obtained by executing the fn function on each element of the array, sequentially, passing in the return value from the calculation on the preceding

[Leetcode] JS 30 Filter Elements from Arrays

[Leetcode] JS 30 Filter Elements from Arrays

Question 2634 truthy values Question Given an integer array arr and a filtering function fn, return a filtered array filteredArr. The fn function takes one or two arguments: * arr[i] - number from the arr * i - index of arr[i] filteredArr should only contain the elements from the arr

[Leetcode] JS 30 Apply Transform over Each Element in Array

[Leetcode] JS 30 Apply Transform over Each Element in Array

Question 2635 high-order function Question Given an integer array arr and a mapping function fn, return a new array with a transformation applied to each element. The returned array should be created such that returnedArray[i] = fn(arr[i], i). Please solve it without the built-in Array.map method. Example

Frontend, Backend, and Database: How They Work Together

Frontend, Backend, and Database: How They Work Together

What’s the question that I bear in mind? How do frontend, backend and database interact with each other? Preface Have you ever wondered how websites like Facebook remember your profile or show personalized content every time you visit? This magic happens thanks to the seamless interaction between the frontend,

[Leetcode] JS 30 Counter II

[Leetcode] JS 30 Counter II

Question 2665 arrow function/pre-increment operators/return object of functions Question Write a function createCounter. It should accept an initial integer init. It should return an object with three functions. The three functions are: * increment() increases the current value by 1 and then returns it. * decrement() reduces the current value

[Leetcode] JS 30 To Be Or Not to Be

[Leetcode] JS 30 To Be Or Not to Be

Question 2704 return object of functions / IIFE / throw error function Write a function expect that helps developers test their code. It should take in any value val and return an object with the following two functions. * toBe(val) accepts another value and returns true if the two values === each other.

[Ruby On Rails] Implementing Image Uploads

[Ruby On Rails] Implementing Image Uploads

What you can learn from this article: * How to integrate Active Storage and Cloudinary into your Ruby on Rails application for seamless image uploads and management. Tools in this article: * Active Storage * Cloudinary Background: Active Storage is a built-in Rails feature that allows you to manage file uploads and associate