JavaScript Coding

Generates a new array by applying a function to each item in environments without native functionality.

Creates a new array with elements passing a test in environments lacking native support.

Takes a nested array and merges all its layers into a single, flat array.

Generates a new array by applying a function to each item in environments without native functionality.

Transforms an array into a single value using a function in unsupported environments.

Generates a new array with each numeric element squared in environments without native functionality.

Executes functions on each array element where native support is absent.

Filter unique elements from an array

Creates a new array where the original array is divided into multiple chunks each of the specified size.

Remove all falsy values from an array in JavaScript.

Currying is a technique of translating a function that takes multiple arguments into a sequence of functions.

Closures and nested functions in JavaScript using IIFEs.

callback function is only invoked once.

Creates a function that allows you to call out names from an array one by one.

Make sure the log function outputs the right value.

Manages unique elements, allowing for efficient addition, removal, and presence checks without duplicates.

Implement a browser history class with navigation functionality like back, forward, and visiting new URLs.

Adheres to First-In-First-Out (FIFO) for orderly item processing, with items added and removed from opposite ends.

Follows Last-In-First-Out (LIFO) with operations like push and pop, ideal for history tracking.

What would be the correct order of execution of the scripts?

Could you find a security issue in this code snippet?

How can I load CSS dynamically in JavaScript?

Take the rating for that pokemon and return a DIV element with the text.

Given a set of integers arr, return a new array of those integers greater than n.

Checks if a given string consists solely of numeric digits, without any spaces, symbols, or decimal points.

Implement a JavaScript function that creates customizable counters.

Write a function that takes a single string argument and returns the string in all uppercase letters.

Write a function that takes a number and returns it clamped between a minimum and maximum value.

A classic programming problem that checks for divisibility by 3 and 5.

A function that counts the frequency of each number in an nested array.

A function that reverses each word in a given string while maintaining word order.

Create a function that cycles through a list of values.

Checks if a given number falls within a specified range, adjusting for order and inclusive of boundaries.

Processing data sequentially through functions, where each uses the previous output as input.

Given a query string, return an object of key value pairs.

Processing data sequentially through functions in reverse order, where the output of the last function becomes the input of the previous.

Implement a JavaScript function that creates counter objects with multiple operations.

Write a function that takes a number and a string and returns the sum of both.

Calculate the digital root of a number.

A custom React hook for managing counter state with increment, decrement, reset and step functionality.

A custom React hook for detecting when an element is being hovered over.

A custom React hook for determining if a component has mounted for client-side vs server-side rendering.

A custom React hook for tracking the previous value of a state variable.

A custom React hook for toggling between true and false states.

objectMap that works similarly to JavaScript's Array map() method, but for objects.

Shallow equality refers to the comparison of the immediate properties of two objects or arrays, without considering nested properties.

A chaining calculator is a class with methods for arithmetic operations, enabling successive method calls to be linked together in one continuous chain.

Shallow merge combines objects, overriding duplicate properties with later values, without merging nested objects.

The memoize function takes a function and returns its memoized variant, optimizing repeated calls by storing previous results.

Transforms each element in an array using an asynchronous mapping function.

The sleep function is a way to pause or delay the execution of the subsequent code for a specified amount of time.

A classic real world use case for Promise.all

Retrieve and rank articles from a paginated API

Currying is a technique of translating a function that takes multiple arguments into a sequence of functions.

Create a timeout function with immediate cancellation capability

A function that creates a digital clock that updates every second in the console.